./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba --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 e29588631802f33e276df8c8a4376435a271a426c8b5d54fd1eb814b142c7499 --- 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-b5237d8 [2022-11-22 02:09:56,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:09:56,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:09:56,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:09:56,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:09:56,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:09:56,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:09:56,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:09:56,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:09:56,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:09:56,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:09:56,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:09:56,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:09:56,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:09:56,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:09:56,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:09:56,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:09:56,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:09:56,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:09:56,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:09:56,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:09:56,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:09:56,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:09:56,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:09:56,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:09:56,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:09:56,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:09:56,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:09:56,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:09:56,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:09:56,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:09:56,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:09:56,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:09:56,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:09:56,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:09:56,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:09:56,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:09:56,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:09:56,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:09:56,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:09:56,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:09:56,120 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:09:56,157 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:09:56,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:09:56,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:09:56,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:09:56,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:09:56,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:09:56,160 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:09:56,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:09:56,160 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:09:56,161 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:09:56,162 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:09:56,162 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:09:56,162 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:09:56,162 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:09:56,162 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:09:56,163 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:09:56,163 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:09:56,163 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:09:56,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:09:56,164 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:09:56,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:09:56,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:09:56,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:09:56,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:09:56,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:09:56,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:09:56,166 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:09:56,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:09:56,167 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:09:56,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:09:56,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:09:56,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:09:56,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:09:56,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:09:56,168 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:09:56,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:09:56,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:09:56,169 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:09:56,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:09:56,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:09:56,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:09:56,171 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_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e29588631802f33e276df8c8a4376435a271a426c8b5d54fd1eb814b142c7499 [2022-11-22 02:09:56,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:09:56,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:09:56,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:09:56,451 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:09:56,452 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:09:56,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c [2022-11-22 02:09:59,562 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:10:00,369 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:10:00,369 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c [2022-11-22 02:10:00,435 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/data/68dd83068/c10e8e7a7ef247f491edb3ebb9830f66/FLAG59c0cc1ef [2022-11-22 02:10:00,456 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/data/68dd83068/c10e8e7a7ef247f491edb3ebb9830f66 [2022-11-22 02:10:00,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:10:00,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:10:00,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:10:00,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:10:00,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:10:00,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:10:00" (1/1) ... [2022-11-22 02:10:00,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fea5220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:00, skipping insertion in model container [2022-11-22 02:10:00,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:10:00" (1/1) ... [2022-11-22 02:10:00,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:10:00,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:10:02,980 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_0f402c51-c169-4d30-84a2-5a90c4080269/sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c[377612,377625] [2022-11-22 02:10:03,052 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_0f402c51-c169-4d30-84a2-5a90c4080269/sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c[383339,383352] [2022-11-22 02:10:03,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:10:03,297 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:10:04,557 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_0f402c51-c169-4d30-84a2-5a90c4080269/sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c[377612,377625] [2022-11-22 02:10:04,566 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_0f402c51-c169-4d30-84a2-5a90c4080269/sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c[383339,383352] [2022-11-22 02:10:04,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:10:04,685 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:10:04,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04 WrapperNode [2022-11-22 02:10:04,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:10:04,687 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:10:04,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:10:04,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:10:04,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04" (1/1) ... [2022-11-22 02:10:04,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04" (1/1) ... [2022-11-22 02:10:05,363 INFO L138 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2022-11-22 02:10:05,363 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:10:05,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:10:05,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:10:05,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:10:05,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04" (1/1) ... [2022-11-22 02:10:05,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04" (1/1) ... [2022-11-22 02:10:05,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04" (1/1) ... [2022-11-22 02:10:05,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04" (1/1) ... [2022-11-22 02:10:05,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04" (1/1) ... [2022-11-22 02:10:05,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04" (1/1) ... [2022-11-22 02:10:05,794 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04" (1/1) ... [2022-11-22 02:10:05,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04" (1/1) ... [2022-11-22 02:10:05,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:10:05,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:10:05,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:10:05,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:10:05,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04" (1/1) ... [2022-11-22 02:10:05,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:10:05,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:05,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:10:05,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:10:05,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:10:05,967 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-22 02:10:05,967 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-22 02:10:05,968 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-22 02:10:05,968 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-22 02:10:05,968 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-22 02:10:05,968 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-22 02:10:05,968 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-22 02:10:05,969 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-22 02:10:05,969 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-22 02:10:05,969 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-22 02:10:05,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:10:05,969 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-22 02:10:05,969 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-22 02:10:05,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:10:05,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:10:06,079 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:10:06,082 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:10:14,954 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:10:17,209 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:10:17,209 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-22 02:10:17,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:10:17 BoogieIcfgContainer [2022-11-22 02:10:17,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:10:17,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:10:17,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:10:17,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:10:17,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:10:00" (1/3) ... [2022-11-22 02:10:17,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61abd386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:10:17, skipping insertion in model container [2022-11-22 02:10:17,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:10:04" (2/3) ... [2022-11-22 02:10:17,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61abd386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:10:17, skipping insertion in model container [2022-11-22 02:10:17,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:10:17" (3/3) ... [2022-11-22 02:10:17,225 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.02.cil-1.c [2022-11-22 02:10:17,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:10:17,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-22 02:10:17,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:10:17,369 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;@3df5553, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:10:17,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-22 02:10:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 1721 states, 1696 states have (on average 1.977004716981132) internal successors, (3353), 1699 states have internal predecessors, (3353), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-22 02:10:17,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 02:10:17,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:17,391 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] [2022-11-22 02:10:17,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:17,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1502965456, now seen corresponding path program 1 times [2022-11-22 02:10:17,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:17,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720706856] [2022-11-22 02:10:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:17,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:10:17,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:17,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720706856] [2022-11-22 02:10:17,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720706856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:17,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:10:17,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:10:17,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249304868] [2022-11-22 02:10:17,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:17,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:10:17,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:17,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:10:17,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:10:17,875 INFO L87 Difference]: Start difference. First operand has 1721 states, 1696 states have (on average 1.977004716981132) internal successors, (3353), 1699 states have internal predecessors, (3353), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2022-11-22 02:10:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:19,022 INFO L93 Difference]: Finished difference Result 3503 states and 6867 transitions. [2022-11-22 02:10:19,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:10:19,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 37 [2022-11-22 02:10:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:19,056 INFO L225 Difference]: With dead ends: 3503 [2022-11-22 02:10:19,056 INFO L226 Difference]: Without dead ends: 1781 [2022-11-22 02:10:19,073 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 [2022-11-22 02:10:19,077 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 3449 mSDsluCounter, 3153 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3449 SdHoareTripleChecker+Valid, 6364 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:19,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3449 Valid, 6364 Invalid, 580 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:10:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2022-11-22 02:10:19,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1780. [2022-11-22 02:10:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1738 states have (on average 1.9562715765247412) internal successors, (3400), 1741 states have internal predecessors, (3400), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-22 02:10:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3456 transitions. [2022-11-22 02:10:19,228 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3456 transitions. Word has length 37 [2022-11-22 02:10:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:19,229 INFO L495 AbstractCegarLoop]: Abstraction has 1780 states and 3456 transitions. [2022-11-22 02:10:19,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2022-11-22 02:10:19,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3456 transitions. [2022-11-22 02:10:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 02:10:19,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:19,234 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:10:19,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:10:19,235 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:19,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1469937969, now seen corresponding path program 1 times [2022-11-22 02:10:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:19,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259245755] [2022-11-22 02:10:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:19,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:10:19,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:19,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259245755] [2022-11-22 02:10:19,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259245755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:19,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678149347] [2022-11-22 02:10:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:19,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:19,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:19,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:10:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:19,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:10:19,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:10:19,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:10:19,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678149347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:19,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:10:19,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:10:19,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934949660] [2022-11-22 02:10:19,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:19,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:10:19,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:19,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:10:19,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:10:19,658 INFO L87 Difference]: Start difference. First operand 1780 states and 3456 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 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) [2022-11-22 02:10:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:20,182 INFO L93 Difference]: Finished difference Result 2041 states and 3815 transitions. [2022-11-22 02:10:20,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:10:20,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 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 66 [2022-11-22 02:10:20,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:20,194 INFO L225 Difference]: With dead ends: 2041 [2022-11-22 02:10:20,194 INFO L226 Difference]: Without dead ends: 1907 [2022-11-22 02:10:20,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:10:20,197 INFO L413 NwaCegarLoop]: 3173 mSDtfsCounter, 3348 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3348 SdHoareTripleChecker+Valid, 3248 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:20,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3348 Valid, 3248 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:10:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2022-11-22 02:10:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1903. [2022-11-22 02:10:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1827 states have (on average 1.9250136836343732) internal successors, (3517), 1831 states have internal predecessors, (3517), 50 states have call successors, (50), 24 states have call predecessors, (50), 24 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-22 02:10:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 3617 transitions. [2022-11-22 02:10:20,263 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 3617 transitions. Word has length 66 [2022-11-22 02:10:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:20,264 INFO L495 AbstractCegarLoop]: Abstraction has 1903 states and 3617 transitions. [2022-11-22 02:10:20,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 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) [2022-11-22 02:10:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 3617 transitions. [2022-11-22 02:10:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 02:10:20,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:20,268 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:10:20,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:20,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:20,475 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:20,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash -115121297, now seen corresponding path program 1 times [2022-11-22 02:10:20,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:20,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277071873] [2022-11-22 02:10:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:20,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:10:20,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:20,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277071873] [2022-11-22 02:10:20,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277071873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:20,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:10:20,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:10:20,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921071437] [2022-11-22 02:10:20,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:20,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:10:20,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:20,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:10:20,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:10:20,964 INFO L87 Difference]: Start difference. First operand 1903 states and 3617 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2022-11-22 02:10:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:22,018 INFO L93 Difference]: Finished difference Result 2443 states and 4338 transitions. [2022-11-22 02:10:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:10:22,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 66 [2022-11-22 02:10:22,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:22,035 INFO L225 Difference]: With dead ends: 2443 [2022-11-22 02:10:22,035 INFO L226 Difference]: Without dead ends: 2187 [2022-11-22 02:10:22,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:10:22,040 INFO L413 NwaCegarLoop]: 3150 mSDtfsCounter, 3514 mSDsluCounter, 9338 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 12488 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:22,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 12488 Invalid, 1116 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [89 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:10:22,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2022-11-22 02:10:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2133. [2022-11-22 02:10:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 1991 states have (on average 1.8719236564540431) internal successors, (3727), 1997 states have internal predecessors, (3727), 92 states have call successors, (92), 48 states have call predecessors, (92), 48 states have return successors, (92), 88 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-22 02:10:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 3911 transitions. [2022-11-22 02:10:22,124 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 3911 transitions. Word has length 66 [2022-11-22 02:10:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:22,124 INFO L495 AbstractCegarLoop]: Abstraction has 2133 states and 3911 transitions. [2022-11-22 02:10:22,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2022-11-22 02:10:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 3911 transitions. [2022-11-22 02:10:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 02:10:22,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:22,128 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:10:22,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:10:22,128 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:22,129 INFO L85 PathProgramCache]: Analyzing trace with hash 721341096, now seen corresponding path program 1 times [2022-11-22 02:10:22,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:22,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165726185] [2022-11-22 02:10:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:22,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:10:22,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:22,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165726185] [2022-11-22 02:10:22,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165726185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:22,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:10:22,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:10:22,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128743488] [2022-11-22 02:10:22,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:22,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:10:22,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:22,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:10:22,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:10:22,390 INFO L87 Difference]: Start difference. First operand 2133 states and 3911 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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) [2022-11-22 02:10:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:23,400 INFO L93 Difference]: Finished difference Result 2871 states and 4883 transitions. [2022-11-22 02:10:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:10:23,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 67 [2022-11-22 02:10:23,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:23,419 INFO L225 Difference]: With dead ends: 2871 [2022-11-22 02:10:23,419 INFO L226 Difference]: Without dead ends: 2385 [2022-11-22 02:10:23,422 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 [2022-11-22 02:10:23,427 INFO L413 NwaCegarLoop]: 3154 mSDtfsCounter, 3478 mSDsluCounter, 9348 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3484 SdHoareTripleChecker+Valid, 12502 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:23,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3484 Valid, 12502 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:10:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2022-11-22 02:10:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2359. [2022-11-22 02:10:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2151 states have (on average 1.8256624825662482) internal successors, (3927), 2159 states have internal predecessors, (3927), 134 states have call successors, (134), 72 states have call predecessors, (134), 72 states have return successors, (134), 128 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-22 02:10:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 4195 transitions. [2022-11-22 02:10:23,596 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 4195 transitions. Word has length 67 [2022-11-22 02:10:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:23,598 INFO L495 AbstractCegarLoop]: Abstraction has 2359 states and 4195 transitions. [2022-11-22 02:10:23,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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) [2022-11-22 02:10:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 4195 transitions. [2022-11-22 02:10:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 02:10:23,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:23,607 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:10:23,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:10:23,608 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash -324435957, now seen corresponding path program 1 times [2022-11-22 02:10:23,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:23,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518975469] [2022-11-22 02:10:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:23,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:10:23,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:23,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518975469] [2022-11-22 02:10:23,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518975469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:23,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:10:23,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:10:23,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324802983] [2022-11-22 02:10:23,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:23,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:10:23,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:10:23,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:10:23,681 INFO L87 Difference]: Start difference. First operand 2359 states and 4195 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2022-11-22 02:10:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:24,350 INFO L93 Difference]: Finished difference Result 2904 states and 4905 transitions. [2022-11-22 02:10:24,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:10:24,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) Word has length 68 [2022-11-22 02:10:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:24,361 INFO L225 Difference]: With dead ends: 2904 [2022-11-22 02:10:24,361 INFO L226 Difference]: Without dead ends: 2532 [2022-11-22 02:10:24,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:10:24,364 INFO L413 NwaCegarLoop]: 3180 mSDtfsCounter, 35 mSDsluCounter, 3142 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6322 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:24,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 6322 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:10:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-11-22 02:10:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2439. [2022-11-22 02:10:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2219 states have (on average 1.8138801261829653) internal successors, (4025), 2227 states have internal predecessors, (4025), 140 states have call successors, (140), 78 states have call predecessors, (140), 78 states have return successors, (140), 134 states have call predecessors, (140), 140 states have call successors, (140) [2022-11-22 02:10:24,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 4305 transitions. [2022-11-22 02:10:24,470 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 4305 transitions. Word has length 68 [2022-11-22 02:10:24,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:24,470 INFO L495 AbstractCegarLoop]: Abstraction has 2439 states and 4305 transitions. [2022-11-22 02:10:24,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2022-11-22 02:10:24,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 4305 transitions. [2022-11-22 02:10:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 02:10:24,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:24,474 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:10:24,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:10:24,475 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:24,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:24,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2073715001, now seen corresponding path program 1 times [2022-11-22 02:10:24,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:24,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941835661] [2022-11-22 02:10:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:24,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:10:24,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:24,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941835661] [2022-11-22 02:10:24,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941835661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:24,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:10:24,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:10:24,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120325699] [2022-11-22 02:10:24,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:24,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:10:24,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:24,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:10:24,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:10:24,535 INFO L87 Difference]: Start difference. First operand 2439 states and 4305 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 02:10:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:25,039 INFO L93 Difference]: Finished difference Result 3626 states and 5863 transitions. [2022-11-22 02:10:25,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:10:25,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 87 [2022-11-22 02:10:25,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:25,053 INFO L225 Difference]: With dead ends: 3626 [2022-11-22 02:10:25,053 INFO L226 Difference]: Without dead ends: 2833 [2022-11-22 02:10:25,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:10:25,059 INFO L413 NwaCegarLoop]: 3174 mSDtfsCounter, 3341 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3341 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:25,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3341 Valid, 3249 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:10:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2022-11-22 02:10:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2822. [2022-11-22 02:10:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2822 states, 2498 states have (on average 1.7502001601281025) internal successors, (4372), 2509 states have internal predecessors, (4372), 205 states have call successors, (205), 117 states have call predecessors, (205), 117 states have return successors, (205), 196 states have call predecessors, (205), 205 states have call successors, (205) [2022-11-22 02:10:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 4782 transitions. [2022-11-22 02:10:25,196 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 4782 transitions. Word has length 87 [2022-11-22 02:10:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:25,196 INFO L495 AbstractCegarLoop]: Abstraction has 2822 states and 4782 transitions. [2022-11-22 02:10:25,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 02:10:25,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 4782 transitions. [2022-11-22 02:10:25,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-22 02:10:25,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:25,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:10:25,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:10:25,206 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:25,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:25,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1328019882, now seen corresponding path program 1 times [2022-11-22 02:10:25,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:25,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045980194] [2022-11-22 02:10:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:25,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 02:10:25,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:25,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045980194] [2022-11-22 02:10:25,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045980194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:25,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191543085] [2022-11-22 02:10:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:25,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:25,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:25,319 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:25,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:10:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:25,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:10:25,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:10:25,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:10:25,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191543085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:25,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:10:25,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-22 02:10:25,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922215994] [2022-11-22 02:10:25,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:25,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:10:25,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:25,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:10:25,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:10:25,486 INFO L87 Difference]: Start difference. First operand 2822 states and 4782 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:10:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:26,062 INFO L93 Difference]: Finished difference Result 3874 states and 6153 transitions. [2022-11-22 02:10:26,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:10:26,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2022-11-22 02:10:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:26,077 INFO L225 Difference]: With dead ends: 3874 [2022-11-22 02:10:26,077 INFO L226 Difference]: Without dead ends: 3088 [2022-11-22 02:10:26,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:10:26,082 INFO L413 NwaCegarLoop]: 3188 mSDtfsCounter, 50 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:26,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 6332 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:10:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2022-11-22 02:10:26,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 2927. [2022-11-22 02:10:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2585 states have (on average 1.7388781431334623) internal successors, (4495), 2596 states have internal predecessors, (4495), 214 states have call successors, (214), 126 states have call predecessors, (214), 126 states have return successors, (214), 205 states have call predecessors, (214), 214 states have call successors, (214) [2022-11-22 02:10:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 4923 transitions. [2022-11-22 02:10:26,217 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 4923 transitions. Word has length 101 [2022-11-22 02:10:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:26,217 INFO L495 AbstractCegarLoop]: Abstraction has 2927 states and 4923 transitions. [2022-11-22 02:10:26,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:10:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 4923 transitions. [2022-11-22 02:10:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-22 02:10:26,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:26,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:10:26,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:26,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:26,428 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:26,428 INFO L85 PathProgramCache]: Analyzing trace with hash 442263137, now seen corresponding path program 2 times [2022-11-22 02:10:26,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:26,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099149195] [2022-11-22 02:10:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:26,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 02:10:26,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:26,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099149195] [2022-11-22 02:10:26,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099149195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:26,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134035181] [2022-11-22 02:10:26,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:10:26,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:26,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:26,622 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:26,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:10:26,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:10:26,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:10:26,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:10:26,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 02:10:27,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:10:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-22 02:10:27,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134035181] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:27,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:10:27,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 7] total 14 [2022-11-22 02:10:27,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070001643] [2022-11-22 02:10:27,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:27,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:10:27,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:27,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:10:27,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:10:27,455 INFO L87 Difference]: Start difference. First operand 2927 states and 4923 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:10:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:28,338 INFO L93 Difference]: Finished difference Result 4210 states and 6617 transitions. [2022-11-22 02:10:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:10:28,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2022-11-22 02:10:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:28,353 INFO L225 Difference]: With dead ends: 4210 [2022-11-22 02:10:28,354 INFO L226 Difference]: Without dead ends: 3319 [2022-11-22 02:10:28,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:10:28,359 INFO L413 NwaCegarLoop]: 3171 mSDtfsCounter, 3356 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 6327 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:28,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3356 Valid, 6327 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:10:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2022-11-22 02:10:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3255. [2022-11-22 02:10:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2877 states have (on average 1.686131386861314) internal successors, (4851), 2888 states have internal predecessors, (4851), 220 states have call successors, (220), 156 states have call predecessors, (220), 156 states have return successors, (236), 211 states have call predecessors, (236), 220 states have call successors, (236) [2022-11-22 02:10:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 5307 transitions. [2022-11-22 02:10:28,658 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 5307 transitions. Word has length 101 [2022-11-22 02:10:28,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:28,658 INFO L495 AbstractCegarLoop]: Abstraction has 3255 states and 5307 transitions. [2022-11-22 02:10:28,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:10:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 5307 transitions. [2022-11-22 02:10:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-22 02:10:28,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:28,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:10:28,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:28,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 02:10:28,872 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:28,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:28,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1346636857, now seen corresponding path program 1 times [2022-11-22 02:10:28,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:28,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661487083] [2022-11-22 02:10:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:28,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:10:29,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:29,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661487083] [2022-11-22 02:10:29,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661487083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:29,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201953356] [2022-11-22 02:10:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:29,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:29,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:29,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:29,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:10:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:29,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:10:29,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:10:29,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:10:29,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201953356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:29,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:10:29,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-22 02:10:29,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328723275] [2022-11-22 02:10:29,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:29,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:10:29,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:29,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:10:29,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:10:29,205 INFO L87 Difference]: Start difference. First operand 3255 states and 5307 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:10:29,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:29,954 INFO L93 Difference]: Finished difference Result 4699 states and 7181 transitions. [2022-11-22 02:10:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:10:29,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 100 [2022-11-22 02:10:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:29,971 INFO L225 Difference]: With dead ends: 4699 [2022-11-22 02:10:29,972 INFO L226 Difference]: Without dead ends: 3582 [2022-11-22 02:10:29,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:10:29,977 INFO L413 NwaCegarLoop]: 3180 mSDtfsCounter, 43 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 6324 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:29,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 6324 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:10:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2022-11-22 02:10:30,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3392. [2022-11-22 02:10:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 2990 states have (on average 1.6755852842809364) internal successors, (5010), 3001 states have internal predecessors, (5010), 232 states have call successors, (232), 168 states have call predecessors, (232), 168 states have return successors, (248), 223 states have call predecessors, (248), 232 states have call successors, (248) [2022-11-22 02:10:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 5490 transitions. [2022-11-22 02:10:30,226 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 5490 transitions. Word has length 100 [2022-11-22 02:10:30,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:30,226 INFO L495 AbstractCegarLoop]: Abstraction has 3392 states and 5490 transitions. [2022-11-22 02:10:30,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:10:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 5490 transitions. [2022-11-22 02:10:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-22 02:10:30,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:30,232 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:10:30,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:30,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-22 02:10:30,438 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:30,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1916218461, now seen corresponding path program 2 times [2022-11-22 02:10:30,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:30,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725720513] [2022-11-22 02:10:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:30,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:10:30,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725720513] [2022-11-22 02:10:30,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725720513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591025798] [2022-11-22 02:10:30,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:10:30,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:30,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:30,710 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:30,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:10:30,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:10:30,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:10:30,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:10:30,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 02:10:30,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:10:30,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591025798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:30,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:10:30,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 02:10:30,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892904664] [2022-11-22 02:10:30,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:30,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:10:30,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:30,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:10:30,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:10:30,875 INFO L87 Difference]: Start difference. First operand 3392 states and 5490 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:10:31,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:31,526 INFO L93 Difference]: Finished difference Result 4654 states and 7185 transitions. [2022-11-22 02:10:31,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:10:31,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2022-11-22 02:10:31,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:31,540 INFO L225 Difference]: With dead ends: 4654 [2022-11-22 02:10:31,540 INFO L226 Difference]: Without dead ends: 3400 [2022-11-22 02:10:31,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:10:31,546 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 84 mSDsluCounter, 3132 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 6325 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:31,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 6325 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:10:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-11-22 02:10:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3380. [2022-11-22 02:10:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 2978 states have (on average 1.6601746138347884) internal successors, (4944), 2989 states have internal predecessors, (4944), 232 states have call successors, (232), 168 states have call predecessors, (232), 168 states have return successors, (248), 223 states have call predecessors, (248), 232 states have call successors, (248) [2022-11-22 02:10:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 5424 transitions. [2022-11-22 02:10:31,881 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 5424 transitions. Word has length 100 [2022-11-22 02:10:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:31,882 INFO L495 AbstractCegarLoop]: Abstraction has 3380 states and 5424 transitions. [2022-11-22 02:10:31,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:10:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 5424 transitions. [2022-11-22 02:10:31,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-22 02:10:31,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:31,886 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:10:31,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:32,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:32,092 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:32,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:32,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1449390339, now seen corresponding path program 1 times [2022-11-22 02:10:32,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:32,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324487646] [2022-11-22 02:10:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:32,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:10:32,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:32,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324487646] [2022-11-22 02:10:32,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324487646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:32,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709566695] [2022-11-22 02:10:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:32,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:32,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:32,292 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:32,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:10:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:32,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:10:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 02:10:32,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:10:32,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709566695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:32,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:10:32,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 02:10:32,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811607204] [2022-11-22 02:10:32,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:32,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:10:32,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:32,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:10:32,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:10:32,462 INFO L87 Difference]: Start difference. First operand 3380 states and 5424 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:10:32,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:32,976 INFO L93 Difference]: Finished difference Result 4822 states and 7231 transitions. [2022-11-22 02:10:32,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:10:32,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2022-11-22 02:10:32,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:32,989 INFO L225 Difference]: With dead ends: 4822 [2022-11-22 02:10:32,989 INFO L226 Difference]: Without dead ends: 3629 [2022-11-22 02:10:32,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:10:32,994 INFO L413 NwaCegarLoop]: 3148 mSDtfsCounter, 3351 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3351 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:32,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3351 Valid, 3166 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:10:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2022-11-22 02:10:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3629. [2022-11-22 02:10:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3197 states have (on average 1.6158898967782296) internal successors, (5166), 3208 states have internal predecessors, (5166), 238 states have call successors, (238), 192 states have call predecessors, (238), 192 states have return successors, (254), 229 states have call predecessors, (254), 238 states have call successors, (254) [2022-11-22 02:10:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 5658 transitions. [2022-11-22 02:10:33,220 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 5658 transitions. Word has length 100 [2022-11-22 02:10:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:33,221 INFO L495 AbstractCegarLoop]: Abstraction has 3629 states and 5658 transitions. [2022-11-22 02:10:33,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:10:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 5658 transitions. [2022-11-22 02:10:33,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-22 02:10:33,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:33,225 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:10:33,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:33,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:33,432 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:33,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:33,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1330410284, now seen corresponding path program 1 times [2022-11-22 02:10:33,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:33,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868980083] [2022-11-22 02:10:33,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:33,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:10:33,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868980083] [2022-11-22 02:10:33,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868980083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:33,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655009861] [2022-11-22 02:10:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:33,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:33,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:33,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:33,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:10:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:33,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:10:33,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:10:33,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:10:33,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655009861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:33,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:10:33,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 02:10:33,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834349061] [2022-11-22 02:10:33,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:33,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:10:33,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:33,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:10:33,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:10:33,804 INFO L87 Difference]: Start difference. First operand 3629 states and 5658 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:10:34,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:34,433 INFO L93 Difference]: Finished difference Result 4993 states and 7391 transitions. [2022-11-22 02:10:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:10:34,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 100 [2022-11-22 02:10:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:34,453 INFO L225 Difference]: With dead ends: 4993 [2022-11-22 02:10:34,453 INFO L226 Difference]: Without dead ends: 3613 [2022-11-22 02:10:34,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:10:34,459 INFO L413 NwaCegarLoop]: 3201 mSDtfsCounter, 71 mSDsluCounter, 3131 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:34,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 6332 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:10:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2022-11-22 02:10:34,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3593. [2022-11-22 02:10:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3165 states have (on average 1.6018957345971565) internal successors, (5070), 3172 states have internal predecessors, (5070), 238 states have call successors, (238), 192 states have call predecessors, (238), 188 states have return successors, (250), 229 states have call predecessors, (250), 238 states have call successors, (250) [2022-11-22 02:10:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5558 transitions. [2022-11-22 02:10:34,809 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5558 transitions. Word has length 100 [2022-11-22 02:10:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:34,810 INFO L495 AbstractCegarLoop]: Abstraction has 3593 states and 5558 transitions. [2022-11-22 02:10:34,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 02:10:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5558 transitions. [2022-11-22 02:10:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-22 02:10:34,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:34,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:10:34,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:35,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 02:10:35,032 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:35,032 INFO L85 PathProgramCache]: Analyzing trace with hash 552159624, now seen corresponding path program 1 times [2022-11-22 02:10:35,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:35,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084876330] [2022-11-22 02:10:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:35,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:10:35,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084876330] [2022-11-22 02:10:35,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084876330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150066159] [2022-11-22 02:10:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:35,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:35,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:35,237 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:35,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:10:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:35,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:10:35,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:10:35,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:10:35,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150066159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:35,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:10:35,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 02:10:35,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296203962] [2022-11-22 02:10:35,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:35,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:10:35,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:35,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:10:35,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:10:35,396 INFO L87 Difference]: Start difference. First operand 3593 states and 5558 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:10:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:36,062 INFO L93 Difference]: Finished difference Result 6244 states and 8732 transitions. [2022-11-22 02:10:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:10:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2022-11-22 02:10:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:36,076 INFO L225 Difference]: With dead ends: 6244 [2022-11-22 02:10:36,076 INFO L226 Difference]: Without dead ends: 4298 [2022-11-22 02:10:36,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:10:36,082 INFO L413 NwaCegarLoop]: 3160 mSDtfsCounter, 39 mSDsluCounter, 3134 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 6294 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:36,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 6294 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:10:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2022-11-22 02:10:36,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3781. [2022-11-22 02:10:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3781 states, 3317 states have (on average 1.587579137775098) internal successors, (5266), 3325 states have internal predecessors, (5266), 256 states have call successors, (256), 210 states have call predecessors, (256), 206 states have return successors, (268), 246 states have call predecessors, (268), 256 states have call successors, (268) [2022-11-22 02:10:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3781 states to 3781 states and 5790 transitions. [2022-11-22 02:10:36,327 INFO L78 Accepts]: Start accepts. Automaton has 3781 states and 5790 transitions. Word has length 101 [2022-11-22 02:10:36,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:36,327 INFO L495 AbstractCegarLoop]: Abstraction has 3781 states and 5790 transitions. [2022-11-22 02:10:36,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:10:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3781 states and 5790 transitions. [2022-11-22 02:10:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-22 02:10:36,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:36,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:10:36,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:36,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:36,538 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2007390611, now seen corresponding path program 1 times [2022-11-22 02:10:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:36,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022793909] [2022-11-22 02:10:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:36,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 02:10:36,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:36,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022793909] [2022-11-22 02:10:36,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022793909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:36,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422217172] [2022-11-22 02:10:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:36,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:36,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:36,699 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:36,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:10:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:36,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:10:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:10:36,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:10:36,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422217172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:36,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:10:36,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-22 02:10:36,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677841037] [2022-11-22 02:10:36,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:36,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:10:36,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:36,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:10:36,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:10:36,928 INFO L87 Difference]: Start difference. First operand 3781 states and 5790 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 02:10:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:37,682 INFO L93 Difference]: Finished difference Result 5455 states and 7797 transitions. [2022-11-22 02:10:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:10:37,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2022-11-22 02:10:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:37,693 INFO L225 Difference]: With dead ends: 5455 [2022-11-22 02:10:37,694 INFO L226 Difference]: Without dead ends: 4358 [2022-11-22 02:10:37,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:10:37,697 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 6654 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6654 SdHoareTripleChecker+Valid, 3273 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:37,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6654 Valid, 3273 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:10:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2022-11-22 02:10:37,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 4037. [2022-11-22 02:10:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4037 states, 3538 states have (on average 1.5542679479932164) internal successors, (5499), 3552 states have internal predecessors, (5499), 268 states have call successors, (268), 229 states have call predecessors, (268), 229 states have return successors, (285), 256 states have call predecessors, (285), 268 states have call successors, (285) [2022-11-22 02:10:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4037 states to 4037 states and 6052 transitions. [2022-11-22 02:10:37,955 INFO L78 Accepts]: Start accepts. Automaton has 4037 states and 6052 transitions. Word has length 102 [2022-11-22 02:10:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:37,955 INFO L495 AbstractCegarLoop]: Abstraction has 4037 states and 6052 transitions. [2022-11-22 02:10:37,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 02:10:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4037 states and 6052 transitions. [2022-11-22 02:10:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-22 02:10:37,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:37,963 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:10:37,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:38,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:38,169 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:38,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:38,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2112059429, now seen corresponding path program 1 times [2022-11-22 02:10:38,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:38,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507487313] [2022-11-22 02:10:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:38,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:10:38,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:38,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507487313] [2022-11-22 02:10:38,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507487313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:38,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:10:38,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:10:38,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479650028] [2022-11-22 02:10:38,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:38,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:10:38,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:38,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:10:38,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:10:38,373 INFO L87 Difference]: Start difference. First operand 4037 states and 6052 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:10:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:39,653 INFO L93 Difference]: Finished difference Result 6219 states and 8611 transitions. [2022-11-22 02:10:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:10:39,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2022-11-22 02:10:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:39,669 INFO L225 Difference]: With dead ends: 6219 [2022-11-22 02:10:39,670 INFO L226 Difference]: Without dead ends: 4913 [2022-11-22 02:10:39,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:10:39,676 INFO L413 NwaCegarLoop]: 3186 mSDtfsCounter, 74 mSDsluCounter, 9372 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 12558 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:39,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 12558 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:10:39,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2022-11-22 02:10:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4811. [2022-11-22 02:10:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4125 states have (on average 1.4926060606060607) internal successors, (6157), 4150 states have internal predecessors, (6157), 368 states have call successors, (368), 311 states have call predecessors, (368), 316 states have return successors, (419), 350 states have call predecessors, (419), 368 states have call successors, (419) [2022-11-22 02:10:40,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 6944 transitions. [2022-11-22 02:10:40,066 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 6944 transitions. Word has length 103 [2022-11-22 02:10:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:40,066 INFO L495 AbstractCegarLoop]: Abstraction has 4811 states and 6944 transitions. [2022-11-22 02:10:40,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:10:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 6944 transitions. [2022-11-22 02:10:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-22 02:10:40,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:40,073 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:10:40,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 02:10:40,074 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:40,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:40,074 INFO L85 PathProgramCache]: Analyzing trace with hash -24333977, now seen corresponding path program 1 times [2022-11-22 02:10:40,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:40,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610635894] [2022-11-22 02:10:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:40,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:10:40,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:40,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610635894] [2022-11-22 02:10:40,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610635894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:40,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208714403] [2022-11-22 02:10:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:40,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:40,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:40,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:40,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:10:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:40,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:10:40,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:10:40,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:10:40,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208714403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:10:40,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:10:40,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-22 02:10:40,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126818513] [2022-11-22 02:10:40,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:10:40,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:10:40,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:10:40,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:10:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:10:40,658 INFO L87 Difference]: Start difference. First operand 4811 states and 6944 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-22 02:10:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:10:42,260 INFO L93 Difference]: Finished difference Result 7904 states and 10557 transitions. [2022-11-22 02:10:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:10:42,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 103 [2022-11-22 02:10:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:10:42,284 INFO L225 Difference]: With dead ends: 7904 [2022-11-22 02:10:42,284 INFO L226 Difference]: Without dead ends: 5713 [2022-11-22 02:10:42,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:10:42,292 INFO L413 NwaCegarLoop]: 3186 mSDtfsCounter, 162 mSDsluCounter, 9316 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 12502 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:10:42,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 12502 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:10:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2022-11-22 02:10:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5463. [2022-11-22 02:10:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 4630 states have (on average 1.451403887688985) internal successors, (6720), 4658 states have internal predecessors, (6720), 452 states have call successors, (452), 377 states have call predecessors, (452), 379 states have return successors, (524), 428 states have call predecessors, (524), 452 states have call successors, (524) [2022-11-22 02:10:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 7696 transitions. [2022-11-22 02:10:42,925 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 7696 transitions. Word has length 103 [2022-11-22 02:10:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:10:42,926 INFO L495 AbstractCegarLoop]: Abstraction has 5463 states and 7696 transitions. [2022-11-22 02:10:42,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-22 02:10:42,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 7696 transitions. [2022-11-22 02:10:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 02:10:42,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:10:42,932 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-11-22 02:10:42,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:10:43,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 02:10:43,139 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:10:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:10:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash -159372150, now seen corresponding path program 1 times [2022-11-22 02:10:43,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:10:43,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70876659] [2022-11-22 02:10:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:43,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:10:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:10:43,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:43,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70876659] [2022-11-22 02:10:43,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70876659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:43,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295605075] [2022-11-22 02:10:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:43,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:43,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:43,695 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:43,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:10:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:43,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:10:43,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:10:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:10:43,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:10:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-22 02:10:44,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295605075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:10:44,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [742393855] [2022-11-22 02:10:44,282 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-22 02:10:44,282 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:10:44,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:10:44,290 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:10:44,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:10:56,234 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 115 for LOIs [2022-11-22 02:10:56,268 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 115 for LOIs [2022-11-22 02:10:56,295 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 115 for LOIs [2022-11-22 02:10:56,310 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 67 for LOIs [2022-11-22 02:10:56,317 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 76 for LOIs [2022-11-22 02:10:56,459 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 113 for LOIs [2022-11-22 02:10:56,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:11:15,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '157125#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (not (= ~token~0 (+ 2 ~local~0))) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (= |#NULL.base| 0))' at error location [2022-11-22 02:11:15,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:11:15,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:11:15,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 21 [2022-11-22 02:11:15,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301740174] [2022-11-22 02:11:15,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:11:15,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 02:11:15,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:15,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 02:11:15,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=3899, Unknown=0, NotChecked=0, Total=4290 [2022-11-22 02:11:15,111 INFO L87 Difference]: Start difference. First operand 5463 states and 7696 transitions. Second operand has 21 states, 17 states have (on average 7.764705882352941) internal successors, (132), 19 states have internal predecessors, (132), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-22 02:11:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:21,540 INFO L93 Difference]: Finished difference Result 8469 states and 11299 transitions. [2022-11-22 02:11:21,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-22 02:11:21,543 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 7.764705882352941) internal successors, (132), 19 states have internal predecessors, (132), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 109 [2022-11-22 02:11:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:21,555 INFO L225 Difference]: With dead ends: 8469 [2022-11-22 02:11:21,556 INFO L226 Difference]: Without dead ends: 4647 [2022-11-22 02:11:21,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 325 SyntacticMatches, 12 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12544 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=1793, Invalid=26599, Unknown=0, NotChecked=0, Total=28392 [2022-11-22 02:11:21,569 INFO L413 NwaCegarLoop]: 3261 mSDtfsCounter, 10980 mSDsluCounter, 41886 mSDsCounter, 0 mSdLazyCounter, 5892 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10999 SdHoareTripleChecker+Valid, 45147 SdHoareTripleChecker+Invalid, 6407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 5892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:21,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10999 Valid, 45147 Invalid, 6407 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [515 Valid, 5892 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-22 02:11:21,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4647 states. [2022-11-22 02:11:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4647 to 4004. [2022-11-22 02:11:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4004 states, 3510 states have (on average 1.5433048433048433) internal successors, (5417), 3525 states have internal predecessors, (5417), 258 states have call successors, (258), 234 states have call predecessors, (258), 234 states have return successors, (286), 244 states have call predecessors, (286), 258 states have call successors, (286) [2022-11-22 02:11:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4004 states to 4004 states and 5961 transitions. [2022-11-22 02:11:21,876 INFO L78 Accepts]: Start accepts. Automaton has 4004 states and 5961 transitions. Word has length 109 [2022-11-22 02:11:21,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:21,876 INFO L495 AbstractCegarLoop]: Abstraction has 4004 states and 5961 transitions. [2022-11-22 02:11:21,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 7.764705882352941) internal successors, (132), 19 states have internal predecessors, (132), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-22 02:11:21,877 INFO L276 IsEmpty]: Start isEmpty. Operand 4004 states and 5961 transitions. [2022-11-22 02:11:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-22 02:11:21,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:21,881 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:21,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:11:22,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 02:11:22,088 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1229092478, now seen corresponding path program 1 times [2022-11-22 02:11:22,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:22,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597291041] [2022-11-22 02:11:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:22,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:11:22,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:22,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597291041] [2022-11-22 02:11:22,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597291041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:11:22,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971693633] [2022-11-22 02:11:22,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:22,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:22,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:11:22,710 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:11:22,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:11:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:22,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:11:22,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:11:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:11:23,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:11:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-22 02:11:23,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971693633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:11:23,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610111931] [2022-11-22 02:11:23,360 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-22 02:11:23,360 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:11:23,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:11:23,361 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:11:23,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:11:33,671 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 115 for LOIs [2022-11-22 02:11:33,709 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 115 for LOIs [2022-11-22 02:11:33,749 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 133 for LOIs [2022-11-22 02:11:33,772 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 115 for LOIs [2022-11-22 02:11:33,794 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 120 for LOIs [2022-11-22 02:11:33,978 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 115 for LOIs [2022-11-22 02:11:34,288 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:11:55,987 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '174248#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (not (= ~token~0 (+ 2 ~local~0))) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-22 02:11:55,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:11:55,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:11:55,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 6] total 22 [2022-11-22 02:11:55,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992067451] [2022-11-22 02:11:55,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:11:55,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 02:11:55,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:55,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 02:11:55,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=4672, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 02:11:55,991 INFO L87 Difference]: Start difference. First operand 4004 states and 5961 transitions. Second operand has 22 states, 18 states have (on average 7.833333333333333) internal successors, (141), 20 states have internal predecessors, (141), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-22 02:12:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:00,408 INFO L93 Difference]: Finished difference Result 5936 states and 8223 transitions. [2022-11-22 02:12:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-22 02:12:00,408 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 7.833333333333333) internal successors, (141), 20 states have internal predecessors, (141), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 112 [2022-11-22 02:12:00,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:00,418 INFO L225 Difference]: With dead ends: 5936 [2022-11-22 02:12:00,419 INFO L226 Difference]: Without dead ends: 3718 [2022-11-22 02:12:00,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 308 SyntacticMatches, 11 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10462 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=1477, Invalid=22085, Unknown=0, NotChecked=0, Total=23562 [2022-11-22 02:12:00,430 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 13847 mSDsluCounter, 31969 mSDsCounter, 0 mSdLazyCounter, 4055 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13860 SdHoareTripleChecker+Valid, 35183 SdHoareTripleChecker+Invalid, 4405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 4055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:00,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13860 Valid, 35183 Invalid, 4405 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [350 Valid, 4055 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-22 02:12:00,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2022-11-22 02:12:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3338. [2022-11-22 02:12:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 2988 states have (on average 1.609437751004016) internal successors, (4809), 2998 states have internal predecessors, (4809), 180 states have call successors, (180), 168 states have call predecessors, (180), 168 states have return successors, (202), 171 states have call predecessors, (202), 180 states have call successors, (202) [2022-11-22 02:12:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5191 transitions. [2022-11-22 02:12:00,673 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5191 transitions. Word has length 112 [2022-11-22 02:12:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:00,674 INFO L495 AbstractCegarLoop]: Abstraction has 3338 states and 5191 transitions. [2022-11-22 02:12:00,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 7.833333333333333) internal successors, (141), 20 states have internal predecessors, (141), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-22 02:12:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5191 transitions. [2022-11-22 02:12:00,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-22 02:12:00,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:00,678 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:00,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:12:00,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:12:00,884 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:00,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:00,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1084192011, now seen corresponding path program 1 times [2022-11-22 02:12:00,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:00,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789865999] [2022-11-22 02:12:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:00,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:12:01,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:01,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789865999] [2022-11-22 02:12:01,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789865999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:12:01,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552380137] [2022-11-22 02:12:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:01,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:01,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:12:01,611 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:12:01,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:12:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:01,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 02:12:01,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:12:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:12:02,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:12:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-22 02:12:03,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552380137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:12:03,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325825267] [2022-11-22 02:12:03,313 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-22 02:12:03,314 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:12:03,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:12:03,315 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:12:03,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:12:14,350 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 181 for LOIs [2022-11-22 02:12:14,842 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 211 for LOIs [2022-11-22 02:12:17,557 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 187 for LOIs [2022-11-22 02:12:17,603 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 69 for LOIs [2022-11-22 02:12:17,612 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 78 for LOIs [2022-11-22 02:12:17,728 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 69 for LOIs [2022-11-22 02:12:18,189 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:12:26,633 WARN L233 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 243 DAG size of output: 198 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:12:48,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '186800#(and (= ~a15~0 1) (<= ~t1_pc~0 1) (= 5 ~a20~0) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (not (= ~token~0 (+ 2 ~local~0))) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a27~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-22 02:12:48,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:12:48,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:12:48,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 14] total 39 [2022-11-22 02:12:48,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128779444] [2022-11-22 02:12:48,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:12:48,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-22 02:12:48,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:48,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-22 02:12:48,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=7726, Unknown=0, NotChecked=0, Total=8372 [2022-11-22 02:12:48,295 INFO L87 Difference]: Start difference. First operand 3338 states and 5191 transitions. Second operand has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2022-11-22 02:13:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:05,386 INFO L93 Difference]: Finished difference Result 7169 states and 9717 transitions. [2022-11-22 02:13:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-11-22 02:13:05,386 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) Word has length 114 [2022-11-22 02:13:05,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:05,399 INFO L225 Difference]: With dead ends: 7169 [2022-11-22 02:13:05,399 INFO L226 Difference]: Without dead ends: 5767 [2022-11-22 02:13:05,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 306 SyntacticMatches, 16 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25526 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=6132, Invalid=55124, Unknown=0, NotChecked=0, Total=61256 [2022-11-22 02:13:05,410 INFO L413 NwaCegarLoop]: 3171 mSDtfsCounter, 32414 mSDsluCounter, 38441 mSDsCounter, 0 mSdLazyCounter, 8866 mSolverCounterSat, 2330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32414 SdHoareTripleChecker+Valid, 41612 SdHoareTripleChecker+Invalid, 11196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2330 IncrementalHoareTripleChecker+Valid, 8866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:05,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32414 Valid, 41612 Invalid, 11196 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2330 Valid, 8866 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-22 02:13:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2022-11-22 02:13:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 3471. [2022-11-22 02:13:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3069 states have (on average 1.5927012056044314) internal successors, (4888), 3085 states have internal predecessors, (4888), 211 states have call successors, (211), 189 states have call predecessors, (211), 189 states have return successors, (211), 196 states have call predecessors, (211), 211 states have call successors, (211) [2022-11-22 02:13:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 5310 transitions. [2022-11-22 02:13:05,841 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 5310 transitions. Word has length 114 [2022-11-22 02:13:05,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:05,842 INFO L495 AbstractCegarLoop]: Abstraction has 3471 states and 5310 transitions. [2022-11-22 02:13:05,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2022-11-22 02:13:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 5310 transitions. [2022-11-22 02:13:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-22 02:13:05,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:05,847 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:13:05,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:13:06,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:06,061 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:06,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash 797805343, now seen corresponding path program 1 times [2022-11-22 02:13:06,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:06,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251208294] [2022-11-22 02:13:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-22 02:13:06,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:06,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251208294] [2022-11-22 02:13:06,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251208294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:06,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:06,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:13:06,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519546059] [2022-11-22 02:13:06,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:06,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:13:06,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:06,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:13:06,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:13:06,261 INFO L87 Difference]: Start difference. First operand 3471 states and 5310 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 02:13:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:07,823 INFO L93 Difference]: Finished difference Result 6004 states and 8191 transitions. [2022-11-22 02:13:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:13:07,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 127 [2022-11-22 02:13:07,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:07,837 INFO L225 Difference]: With dead ends: 6004 [2022-11-22 02:13:07,837 INFO L226 Difference]: Without dead ends: 5085 [2022-11-22 02:13:07,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:13:07,845 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 3492 mSDsluCounter, 6427 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 9703 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:07,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3492 Valid, 9703 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:13:07,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2022-11-22 02:13:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 4120. [2022-11-22 02:13:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4120 states, 3570 states have (on average 1.5316526610644259) internal successors, (5468), 3590 states have internal predecessors, (5468), 291 states have call successors, (291), 257 states have call predecessors, (291), 257 states have return successors, (291), 272 states have call predecessors, (291), 291 states have call successors, (291) [2022-11-22 02:13:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4120 states to 4120 states and 6050 transitions. [2022-11-22 02:13:08,405 INFO L78 Accepts]: Start accepts. Automaton has 4120 states and 6050 transitions. Word has length 127 [2022-11-22 02:13:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:08,406 INFO L495 AbstractCegarLoop]: Abstraction has 4120 states and 6050 transitions. [2022-11-22 02:13:08,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 02:13:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states and 6050 transitions. [2022-11-22 02:13:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-22 02:13:08,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:08,412 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:13:08,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-22 02:13:08,413 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:08,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:08,413 INFO L85 PathProgramCache]: Analyzing trace with hash -958663743, now seen corresponding path program 1 times [2022-11-22 02:13:08,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:08,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426345555] [2022-11-22 02:13:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:08,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-22 02:13:08,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:08,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426345555] [2022-11-22 02:13:08,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426345555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:08,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730348300] [2022-11-22 02:13:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:08,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:08,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:08,586 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:08,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:13:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:08,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:13:08,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-22 02:13:08,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:13:08,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730348300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:08,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:13:08,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-22 02:13:08,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308612657] [2022-11-22 02:13:08,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:08,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:13:08,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:08,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:13:08,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:13:08,806 INFO L87 Difference]: Start difference. First operand 4120 states and 6050 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 02:13:09,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:09,729 INFO L93 Difference]: Finished difference Result 6271 states and 8454 transitions. [2022-11-22 02:13:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:13:09,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 158 [2022-11-22 02:13:09,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:09,739 INFO L225 Difference]: With dead ends: 6271 [2022-11-22 02:13:09,740 INFO L226 Difference]: Without dead ends: 4143 [2022-11-22 02:13:09,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:13:09,746 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 3335 mSDsluCounter, 3275 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3335 SdHoareTripleChecker+Valid, 6483 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:09,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3335 Valid, 6483 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:13:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-11-22 02:13:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4060. [2022-11-22 02:13:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 3518 states have (on average 1.5207504263786242) internal successors, (5350), 3539 states have internal predecessors, (5350), 289 states have call successors, (289), 251 states have call predecessors, (289), 251 states have return successors, (289), 269 states have call predecessors, (289), 289 states have call successors, (289) [2022-11-22 02:13:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 5928 transitions. [2022-11-22 02:13:10,376 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 5928 transitions. Word has length 158 [2022-11-22 02:13:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:10,377 INFO L495 AbstractCegarLoop]: Abstraction has 4060 states and 5928 transitions. [2022-11-22 02:13:10,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 02:13:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 5928 transitions. [2022-11-22 02:13:10,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-22 02:13:10,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:10,383 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:13:10,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:13:10,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-22 02:13:10,595 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:10,595 INFO L85 PathProgramCache]: Analyzing trace with hash -463216040, now seen corresponding path program 1 times [2022-11-22 02:13:10,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:10,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087443576] [2022-11-22 02:13:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-22 02:13:10,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:10,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087443576] [2022-11-22 02:13:10,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087443576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:10,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942669768] [2022-11-22 02:13:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:10,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:10,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:10,774 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:10,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:13:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:10,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:13:10,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-22 02:13:10,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:13:10,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942669768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:10,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:13:10,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-11-22 02:13:10,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87327283] [2022-11-22 02:13:10,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:10,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:13:10,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:13:10,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:13:10,971 INFO L87 Difference]: Start difference. First operand 4060 states and 5928 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 02:13:11,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:11,716 INFO L93 Difference]: Finished difference Result 5074 states and 7027 transitions. [2022-11-22 02:13:11,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:13:11,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 159 [2022-11-22 02:13:11,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:11,724 INFO L225 Difference]: With dead ends: 5074 [2022-11-22 02:13:11,724 INFO L226 Difference]: Without dead ends: 3053 [2022-11-22 02:13:11,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:13:11,728 INFO L413 NwaCegarLoop]: 3178 mSDtfsCounter, 3320 mSDsluCounter, 3252 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3320 SdHoareTripleChecker+Valid, 6430 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:11,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3320 Valid, 6430 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:13:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3053 states. [2022-11-22 02:13:12,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3053 to 2990. [2022-11-22 02:13:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2693 states have (on average 1.6390642406238396) internal successors, (4414), 2705 states have internal predecessors, (4414), 157 states have call successors, (157), 138 states have call predecessors, (157), 138 states have return successors, (157), 146 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-22 02:13:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 4728 transitions. [2022-11-22 02:13:12,033 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 4728 transitions. Word has length 159 [2022-11-22 02:13:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:12,034 INFO L495 AbstractCegarLoop]: Abstraction has 2990 states and 4728 transitions. [2022-11-22 02:13:12,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 02:13:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 4728 transitions. [2022-11-22 02:13:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-22 02:13:12,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:12,039 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 02:13:12,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:13:12,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:12,245 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:12,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1608998491, now seen corresponding path program 1 times [2022-11-22 02:13:12,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:12,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225305598] [2022-11-22 02:13:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:12,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 89 proven. 15 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-22 02:13:12,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:12,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225305598] [2022-11-22 02:13:12,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225305598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:12,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115334811] [2022-11-22 02:13:12,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:12,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:12,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:12,487 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:12,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 02:13:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:12,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:13:12,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 02:13:12,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:13:12,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115334811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:12,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:13:12,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-22 02:13:12,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176767968] [2022-11-22 02:13:12,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:12,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:13:12,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:12,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:13:12,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:13:12,716 INFO L87 Difference]: Start difference. First operand 2990 states and 4728 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-22 02:13:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:13,654 INFO L93 Difference]: Finished difference Result 3543 states and 5329 transitions. [2022-11-22 02:13:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:13:13,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 160 [2022-11-22 02:13:13,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:13,658 INFO L225 Difference]: With dead ends: 3543 [2022-11-22 02:13:13,658 INFO L226 Difference]: Without dead ends: 1642 [2022-11-22 02:13:13,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:13:13,661 INFO L413 NwaCegarLoop]: 3164 mSDtfsCounter, 164 mSDsluCounter, 9287 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 12451 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:13,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 12451 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:13:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-11-22 02:13:13,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1642. [2022-11-22 02:13:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 1.9914686166971358) internal successors, (3268), 1641 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:13,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 3268 transitions. [2022-11-22 02:13:13,698 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 3268 transitions. Word has length 160 [2022-11-22 02:13:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:13,698 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 3268 transitions. [2022-11-22 02:13:13,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-22 02:13:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 3268 transitions. [2022-11-22 02:13:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1633 [2022-11-22 02:13:13,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:13,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:13,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:13:14,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f402c51-c169-4d30-84a2-5a90c4080269/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-22 02:13:14,002 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:14,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:14,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1574841119, now seen corresponding path program 1 times [2022-11-22 02:13:14,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:14,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508101961] [2022-11-22 02:13:14,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:14,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:16,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:16,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508101961] [2022-11-22 02:13:16,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508101961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:16,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:16,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:13:16,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943176167] [2022-11-22 02:13:16,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:16,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:13:16,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:16,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:13:16,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:16,291 INFO L87 Difference]: Start difference. First operand 1642 states and 3268 transitions. Second operand has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:23,627 INFO L93 Difference]: Finished difference Result 4920 states and 9799 transitions. [2022-11-22 02:13:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:13:23,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1632 [2022-11-22 02:13:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:23,636 INFO L225 Difference]: With dead ends: 4920 [2022-11-22 02:13:23,636 INFO L226 Difference]: Without dead ends: 3280 [2022-11-22 02:13:23,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:23,639 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 57 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4908 mSolverCounterSat, 2225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 7133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2225 IncrementalHoareTripleChecker+Valid, 4908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:23,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 623 Invalid, 7133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2225 Valid, 4908 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-22 02:13:23,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2022-11-22 02:13:23,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2022-11-22 02:13:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3279 states have (on average 1.7834705702958218) internal successors, (5848), 3279 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 5848 transitions. [2022-11-22 02:13:23,705 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 5848 transitions. Word has length 1632 [2022-11-22 02:13:23,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:23,707 INFO L495 AbstractCegarLoop]: Abstraction has 3280 states and 5848 transitions. [2022-11-22 02:13:23,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:23,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 5848 transitions. [2022-11-22 02:13:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1641 [2022-11-22 02:13:23,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:23,735 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:23,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-22 02:13:23,735 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1551249773, now seen corresponding path program 1 times [2022-11-22 02:13:23,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:23,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266552698] [2022-11-22 02:13:23,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:23,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:25,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:25,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266552698] [2022-11-22 02:13:25,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266552698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:25,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:25,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:13:25,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776618854] [2022-11-22 02:13:25,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:25,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:13:25,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:25,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:13:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:25,342 INFO L87 Difference]: Start difference. First operand 3280 states and 5848 transitions. Second operand has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:32,512 INFO L93 Difference]: Finished difference Result 9834 states and 17539 transitions. [2022-11-22 02:13:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:13:32,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1640 [2022-11-22 02:13:32,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:32,520 INFO L225 Difference]: With dead ends: 9834 [2022-11-22 02:13:32,521 INFO L226 Difference]: Without dead ends: 6556 [2022-11-22 02:13:32,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:32,526 INFO L413 NwaCegarLoop]: 1122 mSDtfsCounter, 1680 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5574 mSolverCounterSat, 1313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 6887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1313 IncrementalHoareTripleChecker+Valid, 5574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:32,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1680 Valid, 1133 Invalid, 6887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1313 Valid, 5574 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-22 02:13:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-11-22 02:13:32,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6556. [2022-11-22 02:13:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6556 states, 6555 states have (on average 1.5356216628527841) internal successors, (10066), 6555 states have internal predecessors, (10066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6556 states to 6556 states and 10066 transitions. [2022-11-22 02:13:32,624 INFO L78 Accepts]: Start accepts. Automaton has 6556 states and 10066 transitions. Word has length 1640 [2022-11-22 02:13:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:32,625 INFO L495 AbstractCegarLoop]: Abstraction has 6556 states and 10066 transitions. [2022-11-22 02:13:32,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6556 states and 10066 transitions. [2022-11-22 02:13:32,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1648 [2022-11-22 02:13:32,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:32,657 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:32,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-22 02:13:32,657 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:32,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:32,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1919773505, now seen corresponding path program 1 times [2022-11-22 02:13:32,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:32,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524418484] [2022-11-22 02:13:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:32,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:33,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:33,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524418484] [2022-11-22 02:13:33,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524418484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:33,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:33,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:13:33,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198959527] [2022-11-22 02:13:33,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:33,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:13:33,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:33,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:13:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:33,941 INFO L87 Difference]: Start difference. First operand 6556 states and 10066 transitions. Second operand has 3 states, 3 states have (on average 549.0) internal successors, (1647), 3 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:41,000 INFO L93 Difference]: Finished difference Result 19662 states and 30193 transitions. [2022-11-22 02:13:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:13:41,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 549.0) internal successors, (1647), 3 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1647 [2022-11-22 02:13:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:41,015 INFO L225 Difference]: With dead ends: 19662 [2022-11-22 02:13:41,015 INFO L226 Difference]: Without dead ends: 13108 [2022-11-22 02:13:41,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:41,021 INFO L413 NwaCegarLoop]: 2943 mSDtfsCounter, 1679 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4774 mSolverCounterSat, 2062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1679 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 6836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2062 IncrementalHoareTripleChecker+Valid, 4774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:41,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1679 Valid, 2955 Invalid, 6836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2062 Valid, 4774 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-22 02:13:41,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13108 states. [2022-11-22 02:13:41,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13108 to 13108. [2022-11-22 02:13:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13108 states, 13107 states have (on average 1.3360799572747386) internal successors, (17512), 13107 states have internal predecessors, (17512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13108 states to 13108 states and 17512 transitions. [2022-11-22 02:13:41,192 INFO L78 Accepts]: Start accepts. Automaton has 13108 states and 17512 transitions. Word has length 1647 [2022-11-22 02:13:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:41,193 INFO L495 AbstractCegarLoop]: Abstraction has 13108 states and 17512 transitions. [2022-11-22 02:13:41,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 549.0) internal successors, (1647), 3 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:41,194 INFO L276 IsEmpty]: Start isEmpty. Operand 13108 states and 17512 transitions. [2022-11-22 02:13:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1659 [2022-11-22 02:13:41,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:41,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:41,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-22 02:13:41,234 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:41,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash 547224261, now seen corresponding path program 1 times [2022-11-22 02:13:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:41,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390880468] [2022-11-22 02:13:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:41,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:42,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:42,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390880468] [2022-11-22 02:13:42,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390880468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:42,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:42,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:13:42,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251296851] [2022-11-22 02:13:42,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:42,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:13:42,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:42,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:13:42,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:42,381 INFO L87 Difference]: Start difference. First operand 13108 states and 17512 transitions. Second operand has 3 states, 3 states have (on average 552.6666666666666) internal successors, (1658), 3 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:49,705 INFO L93 Difference]: Finished difference Result 32766 states and 45085 transitions. [2022-11-22 02:13:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:13:49,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 552.6666666666666) internal successors, (1658), 3 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1658 [2022-11-22 02:13:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:49,731 INFO L225 Difference]: With dead ends: 32766 [2022-11-22 02:13:49,732 INFO L226 Difference]: Without dead ends: 19660 [2022-11-22 02:13:49,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:49,746 INFO L413 NwaCegarLoop]: 2852 mSDtfsCounter, 1649 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5294 mSolverCounterSat, 1494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 2864 SdHoareTripleChecker+Invalid, 6788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1494 IncrementalHoareTripleChecker+Valid, 5294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:49,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1649 Valid, 2864 Invalid, 6788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1494 Valid, 5294 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-22 02:13:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19660 states. [2022-11-22 02:13:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19660 to 19660. [2022-11-22 02:13:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19660 states, 19659 states have (on average 1.2631364769316853) internal successors, (24832), 19659 states have internal predecessors, (24832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19660 states to 19660 states and 24832 transitions. [2022-11-22 02:13:50,024 INFO L78 Accepts]: Start accepts. Automaton has 19660 states and 24832 transitions. Word has length 1658 [2022-11-22 02:13:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:50,025 INFO L495 AbstractCegarLoop]: Abstraction has 19660 states and 24832 transitions. [2022-11-22 02:13:50,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 552.6666666666666) internal successors, (1658), 3 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 19660 states and 24832 transitions. [2022-11-22 02:13:50,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1665 [2022-11-22 02:13:50,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:50,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:50,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-22 02:13:50,062 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:50,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:50,063 INFO L85 PathProgramCache]: Analyzing trace with hash -548542377, now seen corresponding path program 1 times [2022-11-22 02:13:50,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:50,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604768862] [2022-11-22 02:13:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:50,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:51,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:51,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604768862] [2022-11-22 02:13:51,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604768862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:51,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:51,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:13:51,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491153561] [2022-11-22 02:13:51,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:51,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:13:51,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:51,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:13:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:51,305 INFO L87 Difference]: Start difference. First operand 19660 states and 24832 transitions. Second operand has 3 states, 3 states have (on average 554.6666666666666) internal successors, (1664), 2 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:58,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:58,528 INFO L93 Difference]: Finished difference Result 42594 states and 55507 transitions. [2022-11-22 02:13:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:13:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 554.6666666666666) internal successors, (1664), 2 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1664 [2022-11-22 02:13:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:58,559 INFO L225 Difference]: With dead ends: 42594 [2022-11-22 02:13:58,559 INFO L226 Difference]: Without dead ends: 22936 [2022-11-22 02:13:58,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:58,569 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 1691 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 5472 mSolverCounterSat, 1461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1691 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 6933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1461 IncrementalHoareTripleChecker+Valid, 5472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:58,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1691 Valid, 569 Invalid, 6933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1461 Valid, 5472 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-22 02:13:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22936 states. [2022-11-22 02:13:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22936 to 22936. [2022-11-22 02:13:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22936 states, 22935 states have (on average 1.2881185960322652) internal successors, (29543), 22935 states have internal predecessors, (29543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22936 states to 22936 states and 29543 transitions. [2022-11-22 02:13:58,848 INFO L78 Accepts]: Start accepts. Automaton has 22936 states and 29543 transitions. Word has length 1664 [2022-11-22 02:13:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:58,848 INFO L495 AbstractCegarLoop]: Abstraction has 22936 states and 29543 transitions. [2022-11-22 02:13:58,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 554.6666666666666) internal successors, (1664), 2 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:13:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 22936 states and 29543 transitions. [2022-11-22 02:13:58,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1669 [2022-11-22 02:13:58,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:58,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:58,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-22 02:13:58,892 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:13:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash 820562136, now seen corresponding path program 1 times [2022-11-22 02:13:58,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:58,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695134593] [2022-11-22 02:13:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:58,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:59,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695134593] [2022-11-22 02:13:59,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695134593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:59,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:59,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:13:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522150362] [2022-11-22 02:13:59,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:59,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:13:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:13:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:59,953 INFO L87 Difference]: Start difference. First operand 22936 states and 29543 transitions. Second operand has 3 states, 3 states have (on average 556.0) internal successors, (1668), 2 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:07,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:07,339 INFO L93 Difference]: Finished difference Result 54060 states and 71278 transitions. [2022-11-22 02:14:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:07,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 556.0) internal successors, (1668), 2 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1668 [2022-11-22 02:14:07,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:07,376 INFO L225 Difference]: With dead ends: 54060 [2022-11-22 02:14:07,376 INFO L226 Difference]: Without dead ends: 31126 [2022-11-22 02:14:07,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:07,395 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 1794 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4809 mSolverCounterSat, 2302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 7111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2302 IncrementalHoareTripleChecker+Valid, 4809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:07,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1794 Valid, 725 Invalid, 7111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2302 Valid, 4809 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-22 02:14:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31126 states. [2022-11-22 02:14:07,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31126 to 31126. [2022-11-22 02:14:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31126 states, 31125 states have (on average 1.2830522088353413) internal successors, (39935), 31125 states have internal predecessors, (39935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31126 states to 31126 states and 39935 transitions. [2022-11-22 02:14:07,865 INFO L78 Accepts]: Start accepts. Automaton has 31126 states and 39935 transitions. Word has length 1668 [2022-11-22 02:14:07,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:07,865 INFO L495 AbstractCegarLoop]: Abstraction has 31126 states and 39935 transitions. [2022-11-22 02:14:07,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.0) internal successors, (1668), 2 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 31126 states and 39935 transitions. [2022-11-22 02:14:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1670 [2022-11-22 02:14:07,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:07,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:07,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-22 02:14:07,913 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:07,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:07,913 INFO L85 PathProgramCache]: Analyzing trace with hash -6441162, now seen corresponding path program 1 times [2022-11-22 02:14:07,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:07,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600223673] [2022-11-22 02:14:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:07,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:08,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:08,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600223673] [2022-11-22 02:14:08,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600223673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:08,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:08,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:14:08,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331715996] [2022-11-22 02:14:08,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:08,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:08,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:08,789 INFO L87 Difference]: Start difference. First operand 31126 states and 39935 transitions. Second operand has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:16,268 INFO L93 Difference]: Finished difference Result 91734 states and 117220 transitions. [2022-11-22 02:14:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:16,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1669 [2022-11-22 02:14:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:16,337 INFO L225 Difference]: With dead ends: 91734 [2022-11-22 02:14:16,337 INFO L226 Difference]: Without dead ends: 60610 [2022-11-22 02:14:16,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:16,364 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 2759 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4651 mSolverCounterSat, 2009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2759 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 6660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2009 IncrementalHoareTripleChecker+Valid, 4651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:16,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2759 Valid, 330 Invalid, 6660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2009 Valid, 4651 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-22 02:14:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60610 states. [2022-11-22 02:14:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60610 to 60610. [2022-11-22 02:14:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60610 states, 60609 states have (on average 1.2341896418023726) internal successors, (74803), 60609 states have internal predecessors, (74803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60610 states to 60610 states and 74803 transitions. [2022-11-22 02:14:17,272 INFO L78 Accepts]: Start accepts. Automaton has 60610 states and 74803 transitions. Word has length 1669 [2022-11-22 02:14:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:17,273 INFO L495 AbstractCegarLoop]: Abstraction has 60610 states and 74803 transitions. [2022-11-22 02:14:17,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:17,273 INFO L276 IsEmpty]: Start isEmpty. Operand 60610 states and 74803 transitions. [2022-11-22 02:14:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1759 [2022-11-22 02:14:17,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:17,340 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:17,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-22 02:14:17,340 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:17,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1738798851, now seen corresponding path program 1 times [2022-11-22 02:14:17,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:17,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567489881] [2022-11-22 02:14:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:17,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:18,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:18,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567489881] [2022-11-22 02:14:18,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567489881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:18,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:18,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:18,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896629457] [2022-11-22 02:14:18,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:18,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:18,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:18,367 INFO L87 Difference]: Start difference. First operand 60610 states and 74803 transitions. Second operand has 3 states, 3 states have (on average 586.0) internal successors, (1758), 3 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:26,339 INFO L93 Difference]: Finished difference Result 150702 states and 185637 transitions. [2022-11-22 02:14:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:26,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 586.0) internal successors, (1758), 3 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1758 [2022-11-22 02:14:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:26,435 INFO L225 Difference]: With dead ends: 150702 [2022-11-22 02:14:26,435 INFO L226 Difference]: Without dead ends: 90094 [2022-11-22 02:14:26,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:26,462 INFO L413 NwaCegarLoop]: 919 mSDtfsCounter, 1956 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4611 mSolverCounterSat, 2021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1956 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 6632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2021 IncrementalHoareTripleChecker+Valid, 4611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:26,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1956 Valid, 929 Invalid, 6632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2021 Valid, 4611 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-22 02:14:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90094 states. [2022-11-22 02:14:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90094 to 88456. [2022-11-22 02:14:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88456 states, 88455 states have (on average 1.1505285173251936) internal successors, (101770), 88455 states have internal predecessors, (101770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88456 states to 88456 states and 101770 transitions. [2022-11-22 02:14:27,556 INFO L78 Accepts]: Start accepts. Automaton has 88456 states and 101770 transitions. Word has length 1758 [2022-11-22 02:14:27,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:27,556 INFO L495 AbstractCegarLoop]: Abstraction has 88456 states and 101770 transitions. [2022-11-22 02:14:27,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 586.0) internal successors, (1758), 3 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:27,556 INFO L276 IsEmpty]: Start isEmpty. Operand 88456 states and 101770 transitions. [2022-11-22 02:14:27,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1858 [2022-11-22 02:14:27,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:27,628 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:27,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-22 02:14:27,628 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:27,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:27,629 INFO L85 PathProgramCache]: Analyzing trace with hash -930001193, now seen corresponding path program 1 times [2022-11-22 02:14:27,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:27,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452317121] [2022-11-22 02:14:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:27,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-22 02:14:28,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:28,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452317121] [2022-11-22 02:14:28,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452317121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:28,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:28,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:14:28,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298201916] [2022-11-22 02:14:28,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:28,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:28,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:28,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:28,902 INFO L87 Difference]: Start difference. First operand 88456 states and 101770 transitions. Second operand has 3 states, 3 states have (on average 579.6666666666666) internal successors, (1739), 2 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:37,470 INFO L93 Difference]: Finished difference Result 250620 states and 285202 transitions. [2022-11-22 02:14:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:37,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 579.6666666666666) internal successors, (1739), 2 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1857 [2022-11-22 02:14:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:37,675 INFO L225 Difference]: With dead ends: 250620 [2022-11-22 02:14:37,675 INFO L226 Difference]: Without dead ends: 155614 [2022-11-22 02:14:37,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:37,713 INFO L413 NwaCegarLoop]: 1030 mSDtfsCounter, 1915 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4450 mSolverCounterSat, 2275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 6725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2275 IncrementalHoareTripleChecker+Valid, 4450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:37,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1915 Valid, 1040 Invalid, 6725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2275 Valid, 4450 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-22 02:14:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155614 states. [2022-11-22 02:14:39,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155614 to 142510. [2022-11-22 02:14:39,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142510 states, 142509 states have (on average 1.1032496193222885) internal successors, (157223), 142509 states have internal predecessors, (157223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142510 states to 142510 states and 157223 transitions. [2022-11-22 02:14:40,004 INFO L78 Accepts]: Start accepts. Automaton has 142510 states and 157223 transitions. Word has length 1857 [2022-11-22 02:14:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:40,005 INFO L495 AbstractCegarLoop]: Abstraction has 142510 states and 157223 transitions. [2022-11-22 02:14:40,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 579.6666666666666) internal successors, (1739), 2 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 142510 states and 157223 transitions. [2022-11-22 02:14:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1886 [2022-11-22 02:14:40,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:40,419 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:40,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-22 02:14:40,419 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:40,420 INFO L85 PathProgramCache]: Analyzing trace with hash -649999499, now seen corresponding path program 1 times [2022-11-22 02:14:40,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:40,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225307246] [2022-11-22 02:14:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:40,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-22 02:14:42,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:42,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225307246] [2022-11-22 02:14:42,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225307246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:42,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:42,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:42,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185152325] [2022-11-22 02:14:42,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:42,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:42,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:42,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:42,132 INFO L87 Difference]: Start difference. First operand 142510 states and 157223 transitions. Second operand has 3 states, 3 states have (on average 573.6666666666666) internal successors, (1721), 3 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:51,058 INFO L93 Difference]: Finished difference Result 345624 states and 381232 transitions. [2022-11-22 02:14:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:51,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 573.6666666666666) internal successors, (1721), 3 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1885 [2022-11-22 02:14:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:51,323 INFO L225 Difference]: With dead ends: 345624 [2022-11-22 02:14:51,323 INFO L226 Difference]: Without dead ends: 203116 [2022-11-22 02:14:51,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:51,359 INFO L413 NwaCegarLoop]: 2840 mSDtfsCounter, 1701 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4635 mSolverCounterSat, 2041 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 2852 SdHoareTripleChecker+Invalid, 6676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2041 IncrementalHoareTripleChecker+Valid, 4635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:51,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1701 Valid, 2852 Invalid, 6676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2041 Valid, 4635 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-22 02:14:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203116 states. [2022-11-22 02:14:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203116 to 194926. [2022-11-22 02:14:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194926 states, 194925 states have (on average 1.0833192253430808) internal successors, (211166), 194925 states have internal predecessors, (211166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194926 states to 194926 states and 211166 transitions. [2022-11-22 02:14:54,386 INFO L78 Accepts]: Start accepts. Automaton has 194926 states and 211166 transitions. Word has length 1885 [2022-11-22 02:14:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:54,386 INFO L495 AbstractCegarLoop]: Abstraction has 194926 states and 211166 transitions. [2022-11-22 02:14:54,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 573.6666666666666) internal successors, (1721), 3 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 194926 states and 211166 transitions. [2022-11-22 02:14:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2003 [2022-11-22 02:14:54,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:54,521 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:54,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-22 02:14:54,522 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:54,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1831830519, now seen corresponding path program 1 times [2022-11-22 02:14:54,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:54,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569606518] [2022-11-22 02:14:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:54,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-22 02:14:57,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:57,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569606518] [2022-11-22 02:14:57,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569606518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:57,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:57,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:57,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553718189] [2022-11-22 02:14:57,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:57,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:57,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:57,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:57,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:57,946 INFO L87 Difference]: Start difference. First operand 194926 states and 211166 transitions. Second operand has 3 states, 3 states have (on average 616.6666666666666) internal successors, (1850), 3 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:06,434 INFO L93 Difference]: Finished difference Result 394764 states and 427374 transitions. [2022-11-22 02:15:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:15:06,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 616.6666666666666) internal successors, (1850), 3 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2002 [2022-11-22 02:15:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:06,737 INFO L225 Difference]: With dead ends: 394764 [2022-11-22 02:15:06,737 INFO L226 Difference]: Without dead ends: 199840 [2022-11-22 02:15:06,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:15:06,816 INFO L413 NwaCegarLoop]: 2556 mSDtfsCounter, 1589 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4669 mSolverCounterSat, 1688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 2568 SdHoareTripleChecker+Invalid, 6357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1688 IncrementalHoareTripleChecker+Valid, 4669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:06,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1589 Valid, 2568 Invalid, 6357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1688 Valid, 4669 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-22 02:15:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199840 states. [2022-11-22 02:15:09,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199840 to 196564. [2022-11-22 02:15:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196564 states, 196563 states have (on average 1.0738592715821391) internal successors, (211081), 196563 states have internal predecessors, (211081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196564 states to 196564 states and 211081 transitions. [2022-11-22 02:15:09,697 INFO L78 Accepts]: Start accepts. Automaton has 196564 states and 211081 transitions. Word has length 2002 [2022-11-22 02:15:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:09,697 INFO L495 AbstractCegarLoop]: Abstraction has 196564 states and 211081 transitions. [2022-11-22 02:15:09,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 616.6666666666666) internal successors, (1850), 3 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:09,697 INFO L276 IsEmpty]: Start isEmpty. Operand 196564 states and 211081 transitions. [2022-11-22 02:15:10,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2013 [2022-11-22 02:15:10,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:10,327 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:15:10,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-22 02:15:10,328 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:15:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:10,329 INFO L85 PathProgramCache]: Analyzing trace with hash -814411257, now seen corresponding path program 1 times [2022-11-22 02:15:10,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:10,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303179201] [2022-11-22 02:15:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:10,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-22 02:15:13,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:13,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303179201] [2022-11-22 02:15:13,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303179201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:13,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:15:13,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:15:13,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892724382] [2022-11-22 02:15:13,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:13,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:15:13,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:13,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:15:13,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:15:13,571 INFO L87 Difference]: Start difference. First operand 196564 states and 211081 transitions. Second operand has 3 states, 3 states have (on average 604.6666666666666) internal successors, (1814), 3 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:22,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:22,121 INFO L93 Difference]: Finished difference Result 404592 states and 434880 transitions. [2022-11-22 02:15:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:15:22,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 604.6666666666666) internal successors, (1814), 3 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2012 [2022-11-22 02:15:22,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:22,411 INFO L225 Difference]: With dead ends: 404592 [2022-11-22 02:15:22,411 INFO L226 Difference]: Without dead ends: 208030 [2022-11-22 02:15:22,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:15:22,490 INFO L413 NwaCegarLoop]: 2587 mSDtfsCounter, 1577 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5556 mSolverCounterSat, 752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 2598 SdHoareTripleChecker+Invalid, 6308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 5556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:22,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1577 Valid, 2598 Invalid, 6308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [752 Valid, 5556 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-22 02:15:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208030 states. [2022-11-22 02:15:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208030 to 203116. [2022-11-22 02:15:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203116 states, 203115 states have (on average 1.0719296950003692) internal successors, (217725), 203115 states have internal predecessors, (217725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203116 states to 203116 states and 217725 transitions. [2022-11-22 02:15:25,557 INFO L78 Accepts]: Start accepts. Automaton has 203116 states and 217725 transitions. Word has length 2012 [2022-11-22 02:15:25,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:25,557 INFO L495 AbstractCegarLoop]: Abstraction has 203116 states and 217725 transitions. [2022-11-22 02:15:25,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 604.6666666666666) internal successors, (1814), 3 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 203116 states and 217725 transitions. [2022-11-22 02:15:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2199 [2022-11-22 02:15:25,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:25,774 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:15:25,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-22 02:15:25,774 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:15:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1494100411, now seen corresponding path program 1 times [2022-11-22 02:15:25,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:25,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35626981] [2022-11-22 02:15:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:25,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms