./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 099a6a574a6046de5acacffb386ced7bed15faed2715ea5faa9de06eb0c5ca5a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:34:15,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:34:15,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:34:15,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:34:15,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:34:15,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:34:15,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:34:15,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:34:15,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:34:15,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:34:15,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:34:15,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:34:15,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:34:15,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:34:15,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:34:15,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:34:15,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:34:15,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:34:15,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:34:15,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:34:15,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:34:15,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:34:15,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:34:15,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:34:15,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:34:15,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:34:15,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:34:15,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:34:15,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:34:15,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:34:15,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:34:15,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:34:15,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:34:15,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:34:15,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:34:15,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:34:15,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:34:15,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:34:15,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:34:15,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:34:15,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:34:15,051 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:34:15,070 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:34:15,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:34:15,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:34:15,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:34:15,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:34:15,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:34:15,071 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:34:15,071 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:34:15,071 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:34:15,072 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:34:15,072 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:34:15,072 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:34:15,072 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:34:15,072 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:34:15,072 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:34:15,072 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:34:15,073 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:34:15,073 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:34:15,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:34:15,074 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:34:15,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:34:15,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:34:15,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:34:15,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:34:15,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:34:15,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:34:15,075 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:34:15,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:34:15,075 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:34:15,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:34:15,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:34:15,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:34:15,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:34:15,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:34:15,076 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:34:15,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:34:15,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:34:15,076 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:34:15,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:34:15,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:34:15,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:34:15,077 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_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 099a6a574a6046de5acacffb386ced7bed15faed2715ea5faa9de06eb0c5ca5a [2022-12-14 14:34:15,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:34:15,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:34:15,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:34:15,305 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:34:15,306 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:34:15,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c [2022-12-14 14:34:17,968 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:34:18,375 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:34:18,376 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c [2022-12-14 14:34:18,408 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/data/56c1868ca/02d3afe89759492f94d3b59a90f9313c/FLAGd19fb266a [2022-12-14 14:34:18,420 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/data/56c1868ca/02d3afe89759492f94d3b59a90f9313c [2022-12-14 14:34:18,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:34:18,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:34:18,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:34:18,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:34:18,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:34:18,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:34:18" (1/1) ... [2022-12-14 14:34:18,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd45c1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:18, skipping insertion in model container [2022-12-14 14:34:18,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:34:18" (1/1) ... [2022-12-14 14:34:18,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:34:18,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:34:19,893 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_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c[377612,377625] [2022-12-14 14:34:19,916 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_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c[383339,383352] [2022-12-14 14:34:20,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:34:20,119 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:34:20,957 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_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c[377612,377625] [2022-12-14 14:34:20,962 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_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/sv-benchmarks/c/combinations/Problem05_label47+token_ring.07.cil-1.c[383339,383352] [2022-12-14 14:34:20,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:34:21,013 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:34:21,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21 WrapperNode [2022-12-14 14:34:21,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:34:21,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:34:21,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:34:21,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:34:21,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21" (1/1) ... [2022-12-14 14:34:21,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21" (1/1) ... [2022-12-14 14:34:21,345 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12909 [2022-12-14 14:34:21,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:34:21,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:34:21,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:34:21,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:34:21,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21" (1/1) ... [2022-12-14 14:34:21,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21" (1/1) ... [2022-12-14 14:34:21,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21" (1/1) ... [2022-12-14 14:34:21,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21" (1/1) ... [2022-12-14 14:34:21,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21" (1/1) ... [2022-12-14 14:34:21,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21" (1/1) ... [2022-12-14 14:34:21,611 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21" (1/1) ... [2022-12-14 14:34:21,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21" (1/1) ... [2022-12-14 14:34:21,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:34:21,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:34:21,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:34:21,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:34:21,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21" (1/1) ... [2022-12-14 14:34:21,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:34:21,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:21,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:34:21,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:34:21,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:34:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 14:34:21,739 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 14:34:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 14:34:21,739 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 14:34:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 14:34:21,739 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 14:34:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 14:34:21,740 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 14:34:21,740 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 14:34:21,740 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 14:34:21,740 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 14:34:21,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 14:34:21,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:34:21,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:34:21,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:34:21,848 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:34:21,849 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:34:27,458 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:34:28,936 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:34:28,937 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-14 14:34:28,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:34:28 BoogieIcfgContainer [2022-12-14 14:34:28,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:34:28,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:34:28,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:34:28,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:34:28,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:34:18" (1/3) ... [2022-12-14 14:34:28,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590fbf6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:34:28, skipping insertion in model container [2022-12-14 14:34:28,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:34:21" (2/3) ... [2022-12-14 14:34:28,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590fbf6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:34:28, skipping insertion in model container [2022-12-14 14:34:28,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:34:28" (3/3) ... [2022-12-14 14:34:28,948 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.07.cil-1.c [2022-12-14 14:34:28,965 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:34:28,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 14:34:29,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:34:29,043 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;@55f7a353, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:34:29,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 14:34:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-14 14:34:29,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 14:34:29,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:29,063 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] [2022-12-14 14:34:29,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:29,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:29,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1235999911, now seen corresponding path program 1 times [2022-12-14 14:34:29,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:29,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479230174] [2022-12-14 14:34:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:29,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:34:29,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:29,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479230174] [2022-12-14 14:34:29,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479230174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:29,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:34:29,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:34:29,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340662923] [2022-12-14 14:34:29,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:29,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:34:29,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:29,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:34:29,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:34:29,445 INFO L87 Difference]: Start difference. First operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 14:34:30,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:30,175 INFO L93 Difference]: Finished difference Result 3668 states and 7147 transitions. [2022-12-14 14:34:30,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:34:30,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 52 [2022-12-14 14:34:30,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:30,192 INFO L225 Difference]: With dead ends: 3668 [2022-12-14 14:34:30,193 INFO L226 Difference]: Without dead ends: 1891 [2022-12-14 14:34:30,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:34:30,201 INFO L413 NwaCegarLoop]: 3361 mSDtfsCounter, 3614 mSDsluCounter, 3283 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3614 SdHoareTripleChecker+Valid, 6644 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:30,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3614 Valid, 6644 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:34:30,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-12-14 14:34:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1890. [2022-12-14 14:34:30,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1838 states have (on average 1.9368879216539716) internal successors, (3560), 1841 states have internal predecessors, (3560), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 14:34:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 3636 transitions. [2022-12-14 14:34:30,290 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 3636 transitions. Word has length 52 [2022-12-14 14:34:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:30,290 INFO L495 AbstractCegarLoop]: Abstraction has 1890 states and 3636 transitions. [2022-12-14 14:34:30,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 14:34:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 3636 transitions. [2022-12-14 14:34:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 14:34:30,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:30,294 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:30,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:34:30,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash -523726026, now seen corresponding path program 1 times [2022-12-14 14:34:30,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:30,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588430119] [2022-12-14 14:34:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:30,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:34:30,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:30,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588430119] [2022-12-14 14:34:30,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588430119] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:34:30,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853950674] [2022-12-14 14:34:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:30,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:30,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:30,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:34:30,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:34:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:30,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:34:30,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 14:34:30,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:34:30,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853950674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:30,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:34:30,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:34:30,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309488217] [2022-12-14 14:34:30,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:30,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:34:30,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:34:30,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:34:30,641 INFO L87 Difference]: Start difference. First operand 1890 states and 3636 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:34:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:31,015 INFO L93 Difference]: Finished difference Result 2371 states and 4365 transitions. [2022-12-14 14:34:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:34:31,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 101 [2022-12-14 14:34:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:31,027 INFO L225 Difference]: With dead ends: 2371 [2022-12-14 14:34:31,028 INFO L226 Difference]: Without dead ends: 2127 [2022-12-14 14:34:31,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:34:31,031 INFO L413 NwaCegarLoop]: 3258 mSDtfsCounter, 3435 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:31,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 3408 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:34:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-12-14 14:34:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2123. [2022-12-14 14:34:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2027 states have (on average 1.892945239269857) internal successors, (3837), 2031 states have internal predecessors, (3837), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2022-12-14 14:34:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3977 transitions. [2022-12-14 14:34:31,112 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3977 transitions. Word has length 101 [2022-12-14 14:34:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:31,113 INFO L495 AbstractCegarLoop]: Abstraction has 2123 states and 3977 transitions. [2022-12-14 14:34:31,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:34:31,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3977 transitions. [2022-12-14 14:34:31,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 14:34:31,118 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:31,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:31,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:34:31,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:31,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:31,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash -20660488, now seen corresponding path program 1 times [2022-12-14 14:34:31,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:31,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488383232] [2022-12-14 14:34:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:31,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:34:31,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:31,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488383232] [2022-12-14 14:34:31,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488383232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:34:31,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419378503] [2022-12-14 14:34:31,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:31,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:31,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:31,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:34:31,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:34:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:31,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:34:31,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 14:34:31,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:34:31,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419378503] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:31,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:34:31,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:34:31,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972789825] [2022-12-14 14:34:31,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:31,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:34:31,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:31,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:34:31,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:34:31,629 INFO L87 Difference]: Start difference. First operand 2123 states and 3977 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:34:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:32,045 INFO L93 Difference]: Finished difference Result 3064 states and 5396 transitions. [2022-12-14 14:34:32,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:34:32,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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 101 [2022-12-14 14:34:32,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:32,059 INFO L225 Difference]: With dead ends: 3064 [2022-12-14 14:34:32,059 INFO L226 Difference]: Without dead ends: 2587 [2022-12-14 14:34:32,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:34:32,063 INFO L413 NwaCegarLoop]: 3257 mSDtfsCounter, 3438 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3438 SdHoareTripleChecker+Valid, 3407 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:32,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3438 Valid, 3407 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:34:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-12-14 14:34:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2581. [2022-12-14 14:34:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2399 states have (on average 1.8253438932888704) internal successors, (4379), 2405 states have internal predecessors, (4379), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2022-12-14 14:34:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 4643 transitions. [2022-12-14 14:34:32,150 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 4643 transitions. Word has length 101 [2022-12-14 14:34:32,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:32,150 INFO L495 AbstractCegarLoop]: Abstraction has 2581 states and 4643 transitions. [2022-12-14 14:34:32,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:34:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 4643 transitions. [2022-12-14 14:34:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 14:34:32,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:32,153 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:32,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:34:32,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:32,354 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:32,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1663886326, now seen corresponding path program 1 times [2022-12-14 14:34:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:32,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823934193] [2022-12-14 14:34:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:32,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:34:32,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:32,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823934193] [2022-12-14 14:34:32,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823934193] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:34:32,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250510994] [2022-12-14 14:34:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:32,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:32,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:32,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:34:32,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:34:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:32,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:34:32,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 14:34:32,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:34:32,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250510994] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:32,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:34:32,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:34:32,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225408828] [2022-12-14 14:34:32,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:32,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:34:32,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:32,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:34:32,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:34:32,625 INFO L87 Difference]: Start difference. First operand 2581 states and 4643 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:34:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:33,019 INFO L93 Difference]: Finished difference Result 4426 states and 7408 transitions. [2022-12-14 14:34:33,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:34:33,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 101 [2022-12-14 14:34:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:33,032 INFO L225 Difference]: With dead ends: 4426 [2022-12-14 14:34:33,032 INFO L226 Difference]: Without dead ends: 3491 [2022-12-14 14:34:33,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:34:33,036 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3429 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:33,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3429 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:34:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2022-12-14 14:34:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 3481. [2022-12-14 14:34:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3131 states have (on average 1.7371446822101566) internal successors, (5439), 3141 states have internal predecessors, (5439), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2022-12-14 14:34:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5943 transitions. [2022-12-14 14:34:33,121 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5943 transitions. Word has length 101 [2022-12-14 14:34:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:33,122 INFO L495 AbstractCegarLoop]: Abstraction has 3481 states and 5943 transitions. [2022-12-14 14:34:33,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:34:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5943 transitions. [2022-12-14 14:34:33,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 14:34:33,125 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:33,125 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:33,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:34:33,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 14:34:33,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:33,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:33,326 INFO L85 PathProgramCache]: Analyzing trace with hash 228428088, now seen corresponding path program 1 times [2022-12-14 14:34:33,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:33,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713880318] [2022-12-14 14:34:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:33,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:34:33,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:33,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713880318] [2022-12-14 14:34:33,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713880318] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:34:33,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039416180] [2022-12-14 14:34:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:33,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:33,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:33,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:34:33,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:34:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:33,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:34:33,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:34:33,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:34:33,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039416180] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:33,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:34:33,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:34:33,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365523762] [2022-12-14 14:34:33,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:33,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:34:33,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:34:33,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:34:33,559 INFO L87 Difference]: Start difference. First operand 3481 states and 5943 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:34:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:34,002 INFO L93 Difference]: Finished difference Result 7102 states and 11332 transitions. [2022-12-14 14:34:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:34:34,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-12-14 14:34:34,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:34,019 INFO L225 Difference]: With dead ends: 7102 [2022-12-14 14:34:34,019 INFO L226 Difference]: Without dead ends: 5267 [2022-12-14 14:34:34,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:34:34,025 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3423 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3423 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:34,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3423 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:34:34,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2022-12-14 14:34:34,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 5249. [2022-12-14 14:34:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5249 states, 4571 states have (on average 1.643185298621746) internal successors, (7511), 4589 states have internal predecessors, (7511), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2022-12-14 14:34:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5249 states to 5249 states and 8479 transitions. [2022-12-14 14:34:34,151 INFO L78 Accepts]: Start accepts. Automaton has 5249 states and 8479 transitions. Word has length 101 [2022-12-14 14:34:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:34,151 INFO L495 AbstractCegarLoop]: Abstraction has 5249 states and 8479 transitions. [2022-12-14 14:34:34,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:34:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 5249 states and 8479 transitions. [2022-12-14 14:34:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 14:34:34,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:34,156 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:34,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:34:34,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:34,357 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:34,357 INFO L85 PathProgramCache]: Analyzing trace with hash -306460678, now seen corresponding path program 1 times [2022-12-14 14:34:34,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:34,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283722254] [2022-12-14 14:34:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:34,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 14:34:34,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:34,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283722254] [2022-12-14 14:34:34,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283722254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:34,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:34:34,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:34:34,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292865907] [2022-12-14 14:34:34,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:34,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:34:34,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:34,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:34:34,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:34:34,431 INFO L87 Difference]: Start difference. First operand 5249 states and 8479 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2022-12-14 14:34:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:34,947 INFO L93 Difference]: Finished difference Result 8051 states and 12672 transitions. [2022-12-14 14:34:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:34:34,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 101 [2022-12-14 14:34:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:34,977 INFO L225 Difference]: With dead ends: 8051 [2022-12-14 14:34:34,977 INFO L226 Difference]: Without dead ends: 6209 [2022-12-14 14:34:34,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:34:34,984 INFO L413 NwaCegarLoop]: 3300 mSDtfsCounter, 82 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:34,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 6522 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:34:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2022-12-14 14:34:35,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 5889. [2022-12-14 14:34:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5889 states, 5179 states have (on average 1.6510909441977215) internal successors, (8551), 5197 states have internal predecessors, (8551), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2022-12-14 14:34:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 9551 transitions. [2022-12-14 14:34:35,220 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 9551 transitions. Word has length 101 [2022-12-14 14:34:35,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:35,221 INFO L495 AbstractCegarLoop]: Abstraction has 5889 states and 9551 transitions. [2022-12-14 14:34:35,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2022-12-14 14:34:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 9551 transitions. [2022-12-14 14:34:35,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 14:34:35,233 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:35,233 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:35,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 14:34:35,234 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:35,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:35,234 INFO L85 PathProgramCache]: Analyzing trace with hash -961462173, now seen corresponding path program 1 times [2022-12-14 14:34:35,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:35,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414956422] [2022-12-14 14:34:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:35,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 14:34:35,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:35,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414956422] [2022-12-14 14:34:35,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414956422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:35,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:34:35,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:34:35,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341286489] [2022-12-14 14:34:35,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:35,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:34:35,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:35,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:34:35,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:34:35,321 INFO L87 Difference]: Start difference. First operand 5889 states and 9551 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, (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) [2022-12-14 14:34:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:35,827 INFO L93 Difference]: Finished difference Result 14230 states and 22100 transitions. [2022-12-14 14:34:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:34:35,827 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, (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 136 [2022-12-14 14:34:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:35,869 INFO L225 Difference]: With dead ends: 14230 [2022-12-14 14:34:35,869 INFO L226 Difference]: Without dead ends: 9987 [2022-12-14 14:34:35,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:34:35,881 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3427 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3427 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:35,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3427 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:34:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2022-12-14 14:34:36,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 9937. [2022-12-14 14:34:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9937 states, 8555 states have (on average 1.5793103448275863) internal successors, (13511), 8589 states have internal predecessors, (13511), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2022-12-14 14:34:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9937 states to 9937 states and 15439 transitions. [2022-12-14 14:34:36,262 INFO L78 Accepts]: Start accepts. Automaton has 9937 states and 15439 transitions. Word has length 136 [2022-12-14 14:34:36,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:36,262 INFO L495 AbstractCegarLoop]: Abstraction has 9937 states and 15439 transitions. [2022-12-14 14:34:36,263 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, (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) [2022-12-14 14:34:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 9937 states and 15439 transitions. [2022-12-14 14:34:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 14:34:36,286 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:36,286 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:36,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:34:36,286 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:36,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:36,287 INFO L85 PathProgramCache]: Analyzing trace with hash -42320518, now seen corresponding path program 1 times [2022-12-14 14:34:36,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:36,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850735704] [2022-12-14 14:34:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:36,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 14:34:36,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:36,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850735704] [2022-12-14 14:34:36,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850735704] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:36,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:34:36,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:34:36,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356391495] [2022-12-14 14:34:36,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:36,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:34:36,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:36,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:34:36,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:34:36,369 INFO L87 Difference]: Start difference. First operand 9937 states and 15439 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, (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) [2022-12-14 14:34:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:37,141 INFO L93 Difference]: Finished difference Result 26230 states and 39732 transitions. [2022-12-14 14:34:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:34:37,142 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, (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 136 [2022-12-14 14:34:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:37,188 INFO L225 Difference]: With dead ends: 26230 [2022-12-14 14:34:37,188 INFO L226 Difference]: Without dead ends: 17939 [2022-12-14 14:34:37,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:34:37,210 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3429 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:37,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3429 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:34:37,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17939 states. [2022-12-14 14:34:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17939 to 17841. [2022-12-14 14:34:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17841 states, 15147 states have (on average 1.5257806826434277) internal successors, (23111), 15213 states have internal predecessors, (23111), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2022-12-14 14:34:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17841 states to 17841 states and 26831 transitions. [2022-12-14 14:34:37,716 INFO L78 Accepts]: Start accepts. Automaton has 17841 states and 26831 transitions. Word has length 136 [2022-12-14 14:34:37,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:37,716 INFO L495 AbstractCegarLoop]: Abstraction has 17841 states and 26831 transitions. [2022-12-14 14:34:37,716 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, (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) [2022-12-14 14:34:37,716 INFO L276 IsEmpty]: Start isEmpty. Operand 17841 states and 26831 transitions. [2022-12-14 14:34:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 14:34:37,741 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:37,741 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:37,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 14:34:37,742 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:37,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:37,742 INFO L85 PathProgramCache]: Analyzing trace with hash -609934200, now seen corresponding path program 1 times [2022-12-14 14:34:37,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:37,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133280528] [2022-12-14 14:34:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:37,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 14:34:37,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:37,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133280528] [2022-12-14 14:34:37,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133280528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:37,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:34:37,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:34:37,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117450631] [2022-12-14 14:34:37,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:37,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:34:37,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:37,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:34:37,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:34:37,796 INFO L87 Difference]: Start difference. First operand 17841 states and 26831 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, (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) [2022-12-14 14:34:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:38,918 INFO L93 Difference]: Finished difference Result 49654 states and 73812 transitions. [2022-12-14 14:34:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:34:38,918 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, (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 136 [2022-12-14 14:34:38,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:39,001 INFO L225 Difference]: With dead ends: 49654 [2022-12-14 14:34:39,001 INFO L226 Difference]: Without dead ends: 33459 [2022-12-14 14:34:39,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:34:39,046 INFO L413 NwaCegarLoop]: 3240 mSDtfsCounter, 3432 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:39,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3390 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:34:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33459 states. [2022-12-14 14:34:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33459 to 33265. [2022-12-14 14:34:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33265 states, 28011 states have (on average 1.4876655599585877) internal successors, (41671), 28141 states have internal predecessors, (41671), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-12-14 14:34:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33265 states to 33265 states and 48847 transitions. [2022-12-14 14:34:40,100 INFO L78 Accepts]: Start accepts. Automaton has 33265 states and 48847 transitions. Word has length 136 [2022-12-14 14:34:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:40,100 INFO L495 AbstractCegarLoop]: Abstraction has 33265 states and 48847 transitions. [2022-12-14 14:34:40,100 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, (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) [2022-12-14 14:34:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 33265 states and 48847 transitions. [2022-12-14 14:34:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:34:40,176 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:40,176 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:40,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 14:34:40,176 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:40,177 INFO L85 PathProgramCache]: Analyzing trace with hash -991523630, now seen corresponding path program 1 times [2022-12-14 14:34:40,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:40,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652007914] [2022-12-14 14:34:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:40,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 14:34:40,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:40,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652007914] [2022-12-14 14:34:40,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652007914] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:40,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:34:40,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:34:40,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800531817] [2022-12-14 14:34:40,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:40,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:34:40,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:40,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:34:40,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:34:40,252 INFO L87 Difference]: Start difference. First operand 33265 states and 48847 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:34:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:42,008 INFO L93 Difference]: Finished difference Result 84725 states and 125265 transitions. [2022-12-14 14:34:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:34:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-12-14 14:34:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:42,194 INFO L225 Difference]: With dead ends: 84725 [2022-12-14 14:34:42,194 INFO L226 Difference]: Without dead ends: 53107 [2022-12-14 14:34:42,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:34:42,236 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 92 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6475 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 [2022-12-14 14:34:42,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6475 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:34:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53107 states. [2022-12-14 14:34:43,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53107 to 46585. [2022-12-14 14:34:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46585 states, 40559 states have (on average 1.5482383687960748) internal successors, (62795), 40690 states have internal predecessors, (62795), 3974 states have call successors, (3974), 2050 states have call predecessors, (3974), 2050 states have return successors, (3974), 3845 states have call predecessors, (3974), 3974 states have call successors, (3974) [2022-12-14 14:34:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 70743 transitions. [2022-12-14 14:34:43,748 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 70743 transitions. Word has length 156 [2022-12-14 14:34:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:43,748 INFO L495 AbstractCegarLoop]: Abstraction has 46585 states and 70743 transitions. [2022-12-14 14:34:43,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:34:43,748 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 70743 transitions. [2022-12-14 14:34:43,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:34:43,823 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:43,823 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:43,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 14:34:43,823 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:43,824 INFO L85 PathProgramCache]: Analyzing trace with hash 809319430, now seen corresponding path program 2 times [2022-12-14 14:34:43,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:43,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432351490] [2022-12-14 14:34:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:43,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 14:34:44,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:44,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432351490] [2022-12-14 14:34:44,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432351490] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:34:44,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750135817] [2022-12-14 14:34:44,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:34:44,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:44,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:44,013 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:34:44,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:34:44,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:34:44,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:34:44,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:34:44,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 14:34:44,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:34:44,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750135817] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:44,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:34:44,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 14:34:44,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320675615] [2022-12-14 14:34:44,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:44,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:34:44,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:44,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:34:44,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:34:44,198 INFO L87 Difference]: Start difference. First operand 46585 states and 70743 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2022-12-14 14:34:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:46,102 INFO L93 Difference]: Finished difference Result 87933 states and 133849 transitions. [2022-12-14 14:34:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:34:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 156 [2022-12-14 14:34:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:46,238 INFO L225 Difference]: With dead ends: 87933 [2022-12-14 14:34:46,238 INFO L226 Difference]: Without dead ends: 65083 [2022-12-14 14:34:46,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:34:46,277 INFO L413 NwaCegarLoop]: 3334 mSDtfsCounter, 125 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6558 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:46,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 6558 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:34:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65083 states. [2022-12-14 14:34:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65083 to 59129. [2022-12-14 14:34:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59129 states, 52335 states have (on average 1.5740708894621191) internal successors, (82379), 52466 states have internal predecessors, (82379), 4358 states have call successors, (4358), 2434 states have call predecessors, (4358), 2434 states have return successors, (4358), 4229 states have call predecessors, (4358), 4358 states have call successors, (4358) [2022-12-14 14:34:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59129 states to 59129 states and 91095 transitions. [2022-12-14 14:34:48,116 INFO L78 Accepts]: Start accepts. Automaton has 59129 states and 91095 transitions. Word has length 156 [2022-12-14 14:34:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:48,116 INFO L495 AbstractCegarLoop]: Abstraction has 59129 states and 91095 transitions. [2022-12-14 14:34:48,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2022-12-14 14:34:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 59129 states and 91095 transitions. [2022-12-14 14:34:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:34:48,194 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:48,194 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:48,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:34:48,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 14:34:48,396 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:48,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1766061647, now seen corresponding path program 3 times [2022-12-14 14:34:48,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:48,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690259411] [2022-12-14 14:34:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:48,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 14:34:48,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:48,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690259411] [2022-12-14 14:34:48,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690259411] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:34:48,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356520009] [2022-12-14 14:34:48,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:34:48,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:48,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:48,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:34:48,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:34:48,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:34:48,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:34:48,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:34:48,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 14:34:48,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:34:48,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356520009] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:48,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:34:48,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:34:48,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053565993] [2022-12-14 14:34:48,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:48,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:34:48,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:34:48,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:34:48,792 INFO L87 Difference]: Start difference. First operand 59129 states and 91095 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2022-12-14 14:34:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:51,256 INFO L93 Difference]: Finished difference Result 88477 states and 137113 transitions. [2022-12-14 14:34:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:34:51,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 156 [2022-12-14 14:34:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:51,377 INFO L225 Difference]: With dead ends: 88477 [2022-12-14 14:34:51,378 INFO L226 Difference]: Without dead ends: 59259 [2022-12-14 14:34:51,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:34:51,431 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 166 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 6559 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:51,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 6559 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:34:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2022-12-14 14:34:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 58809. [2022-12-14 14:34:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58809 states, 52015 states have (on average 1.564068057291166) internal successors, (81355), 52146 states have internal predecessors, (81355), 4358 states have call successors, (4358), 2434 states have call predecessors, (4358), 2434 states have return successors, (4358), 4229 states have call predecessors, (4358), 4358 states have call successors, (4358) [2022-12-14 14:34:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58809 states to 58809 states and 90071 transitions. [2022-12-14 14:34:53,293 INFO L78 Accepts]: Start accepts. Automaton has 58809 states and 90071 transitions. Word has length 156 [2022-12-14 14:34:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:53,293 INFO L495 AbstractCegarLoop]: Abstraction has 58809 states and 90071 transitions. [2022-12-14 14:34:53,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2022-12-14 14:34:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 58809 states and 90071 transitions. [2022-12-14 14:34:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:34:53,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:53,366 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:53,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:34:53,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:53,567 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:53,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2005584978, now seen corresponding path program 1 times [2022-12-14 14:34:53,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:53,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171942867] [2022-12-14 14:34:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:53,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 14:34:53,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:53,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171942867] [2022-12-14 14:34:53,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171942867] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:34:53,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742611389] [2022-12-14 14:34:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:53,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:53,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:53,778 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:34:53,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:34:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:53,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:34:53,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 14:34:53,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:34:53,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742611389] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:53,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:34:53,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:34:53,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500641120] [2022-12-14 14:34:53,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:53,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:34:53,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:53,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:34:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:34:53,973 INFO L87 Difference]: Start difference. First operand 58809 states and 90071 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2022-12-14 14:34:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:56,073 INFO L93 Difference]: Finished difference Result 95989 states and 144626 transitions. [2022-12-14 14:34:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:34:56,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 156 [2022-12-14 14:34:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:56,225 INFO L225 Difference]: With dead ends: 95989 [2022-12-14 14:34:56,225 INFO L226 Difference]: Without dead ends: 67251 [2022-12-14 14:34:56,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:34:56,278 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3432 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:56,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3283 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:34:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67251 states. [2022-12-14 14:34:58,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67251 to 67251. [2022-12-14 14:34:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67251 states, 59693 states have (on average 1.519390883353157) internal successors, (90697), 59824 states have internal predecessors, (90697), 4612 states have call successors, (4612), 2944 states have call predecessors, (4612), 2944 states have return successors, (4612), 4483 states have call predecessors, (4612), 4612 states have call successors, (4612) [2022-12-14 14:34:58,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67251 states to 67251 states and 99921 transitions. [2022-12-14 14:34:58,632 INFO L78 Accepts]: Start accepts. Automaton has 67251 states and 99921 transitions. Word has length 156 [2022-12-14 14:34:58,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:58,633 INFO L495 AbstractCegarLoop]: Abstraction has 67251 states and 99921 transitions. [2022-12-14 14:34:58,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2022-12-14 14:34:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 67251 states and 99921 transitions. [2022-12-14 14:34:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:34:58,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:58,711 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:58,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 14:34:58,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:58,913 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:58,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:58,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2035540073, now seen corresponding path program 1 times [2022-12-14 14:34:58,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:58,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421706235] [2022-12-14 14:34:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:58,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 14:34:59,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:59,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421706235] [2022-12-14 14:34:59,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421706235] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:34:59,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368709085] [2022-12-14 14:34:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:59,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:59,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:59,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:34:59,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:34:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:59,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 14:34:59,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 14:34:59,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:34:59,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368709085] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:34:59,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:34:59,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 14:34:59,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585401219] [2022-12-14 14:34:59,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:59,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:34:59,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:59,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:34:59,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:34:59,313 INFO L87 Difference]: Start difference. First operand 67251 states and 99921 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:35:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:35:03,503 INFO L93 Difference]: Finished difference Result 199673 states and 294097 transitions. [2022-12-14 14:35:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:35:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 156 [2022-12-14 14:35:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:35:03,891 INFO L225 Difference]: With dead ends: 199673 [2022-12-14 14:35:03,891 INFO L226 Difference]: Without dead ends: 134069 [2022-12-14 14:35:03,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:35:03,992 INFO L413 NwaCegarLoop]: 3384 mSDtfsCounter, 3460 mSDsluCounter, 3511 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3460 SdHoareTripleChecker+Valid, 6895 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:35:03,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3460 Valid, 6895 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:35:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134069 states. [2022-12-14 14:35:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134069 to 133547. [2022-12-14 14:35:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133547 states, 118315 states have (on average 1.487072645057685) internal successors, (175943), 118831 states have internal predecessors, (175943), 9089 states have call successors, (9089), 5885 states have call predecessors, (9089), 6141 states have return successors, (10749), 8831 states have call predecessors, (10749), 9089 states have call successors, (10749) [2022-12-14 14:35:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133547 states to 133547 states and 195781 transitions. [2022-12-14 14:35:08,339 INFO L78 Accepts]: Start accepts. Automaton has 133547 states and 195781 transitions. Word has length 156 [2022-12-14 14:35:08,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:35:08,339 INFO L495 AbstractCegarLoop]: Abstraction has 133547 states and 195781 transitions. [2022-12-14 14:35:08,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:35:08,340 INFO L276 IsEmpty]: Start isEmpty. Operand 133547 states and 195781 transitions. [2022-12-14 14:35:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:35:08,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:35:08,529 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:35:08,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 14:35:08,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 14:35:08,731 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:35:08,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:35:08,732 INFO L85 PathProgramCache]: Analyzing trace with hash 417113432, now seen corresponding path program 2 times [2022-12-14 14:35:08,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:35:08,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765108992] [2022-12-14 14:35:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:35:08,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:35:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:35:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 14:35:08,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:35:08,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765108992] [2022-12-14 14:35:08,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765108992] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:35:08,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134246039] [2022-12-14 14:35:08,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:35:08,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:35:08,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:35:08,909 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:35:08,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:35:09,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 14:35:09,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:35:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:35:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:35:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 14:35:09,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:35:09,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134246039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:35:09,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:35:09,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:35:09,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136930986] [2022-12-14 14:35:09,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:35:09,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:35:09,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:35:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:35:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:35:09,088 INFO L87 Difference]: Start difference. First operand 133547 states and 195781 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2022-12-14 14:35:15,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:35:15,173 INFO L93 Difference]: Finished difference Result 265697 states and 395369 transitions. [2022-12-14 14:35:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:35:15,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 156 [2022-12-14 14:35:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:35:15,637 INFO L225 Difference]: With dead ends: 265697 [2022-12-14 14:35:15,637 INFO L226 Difference]: Without dead ends: 196581 [2022-12-14 14:35:15,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:35:15,760 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3421 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3421 SdHoareTripleChecker+Valid, 3397 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:35:15,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3421 Valid, 3397 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:35:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196581 states. [2022-12-14 14:35:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196581 to 195167. [2022-12-14 14:35:21,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195167 states, 172519 states have (on average 1.4846538642120577) internal successors, (256131), 173163 states have internal predecessors, (256131), 13565 states have call successors, (13565), 8825 states have call predecessors, (13565), 9081 states have return successors, (17397), 13179 states have call predecessors, (17397), 13565 states have call successors, (17397) [2022-12-14 14:35:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195167 states to 195167 states and 287093 transitions. [2022-12-14 14:35:22,425 INFO L78 Accepts]: Start accepts. Automaton has 195167 states and 287093 transitions. Word has length 156 [2022-12-14 14:35:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:35:22,425 INFO L495 AbstractCegarLoop]: Abstraction has 195167 states and 287093 transitions. [2022-12-14 14:35:22,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2022-12-14 14:35:22,426 INFO L276 IsEmpty]: Start isEmpty. Operand 195167 states and 287093 transitions. [2022-12-14 14:35:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:35:22,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:35:22,727 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:35:22,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 14:35:22,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 14:35:22,929 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:35:22,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:35:22,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1057564522, now seen corresponding path program 3 times [2022-12-14 14:35:22,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:35:22,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542406003] [2022-12-14 14:35:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:35:22,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:35:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:35:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 14:35:23,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:35:23,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542406003] [2022-12-14 14:35:23,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542406003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:35:23,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334538881] [2022-12-14 14:35:23,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:35:23,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:35:23,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:35:23,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:35:23,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 14:35:23,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:35:23,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:35:23,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:35:23,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:35:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:35:23,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:35:23,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334538881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:35:23,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:35:23,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:35:23,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88366305] [2022-12-14 14:35:23,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:35:23,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:35:23,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:35:23,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:35:23,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:35:23,256 INFO L87 Difference]: Start difference. First operand 195167 states and 287093 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2022-12-14 14:35:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:35:30,569 INFO L93 Difference]: Finished difference Result 338123 states and 498008 transitions. [2022-12-14 14:35:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:35:30,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 156 [2022-12-14 14:35:30,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:35:31,169 INFO L225 Difference]: With dead ends: 338123 [2022-12-14 14:35:31,170 INFO L226 Difference]: Without dead ends: 222665 [2022-12-14 14:35:31,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:35:31,337 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 3402 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3402 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:35:31,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3402 Valid, 3294 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:35:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222665 states. [2022-12-14 14:35:39,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222665 to 221697. [2022-12-14 14:35:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221697 states, 197405 states have (on average 1.4462500949823967) internal successors, (285497), 198177 states have internal predecessors, (285497), 13939 states have call successors, (13939), 9967 states have call predecessors, (13939), 10351 states have return successors, (19267), 13553 states have call predecessors, (19267), 13939 states have call successors, (19267) [2022-12-14 14:35:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221697 states to 221697 states and 318703 transitions. [2022-12-14 14:35:39,926 INFO L78 Accepts]: Start accepts. Automaton has 221697 states and 318703 transitions. Word has length 156 [2022-12-14 14:35:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:35:39,927 INFO L495 AbstractCegarLoop]: Abstraction has 221697 states and 318703 transitions. [2022-12-14 14:35:39,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2022-12-14 14:35:39,927 INFO L276 IsEmpty]: Start isEmpty. Operand 221697 states and 318703 transitions. [2022-12-14 14:35:40,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:35:40,441 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:35:40,441 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:35:40,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 14:35:40,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 14:35:40,643 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:35:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:35:40,644 INFO L85 PathProgramCache]: Analyzing trace with hash -18587914, now seen corresponding path program 1 times [2022-12-14 14:35:40,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:35:40,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55614775] [2022-12-14 14:35:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:35:40,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:35:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:35:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 14:35:40,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:35:40,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55614775] [2022-12-14 14:35:40,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55614775] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:35:40,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762126886] [2022-12-14 14:35:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:35:40,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:35:40,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:35:40,957 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:35:40,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 14:35:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:35:41,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:35:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:35:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:35:41,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:35:41,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762126886] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:35:41,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:35:41,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:35:41,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618538104] [2022-12-14 14:35:41,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:35:41,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:35:41,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:35:41,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:35:41,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:35:41,147 INFO L87 Difference]: Start difference. First operand 221697 states and 318703 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2022-12-14 14:35:48,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:35:48,586 INFO L93 Difference]: Finished difference Result 350597 states and 513617 transitions. [2022-12-14 14:35:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:35:48,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 156 [2022-12-14 14:35:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:35:49,184 INFO L225 Difference]: With dead ends: 350597 [2022-12-14 14:35:49,184 INFO L226 Difference]: Without dead ends: 221635 [2022-12-14 14:35:49,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:35:49,367 INFO L413 NwaCegarLoop]: 3355 mSDtfsCounter, 146 mSDsluCounter, 3207 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 6562 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:35:49,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 6562 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:35:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221635 states. [2022-12-14 14:35:57,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221635 to 219713. [2022-12-14 14:35:57,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219713 states, 195421 states have (on average 1.4321132324571055) internal successors, (279865), 196193 states have internal predecessors, (279865), 13939 states have call successors, (13939), 9967 states have call predecessors, (13939), 10351 states have return successors, (19267), 13553 states have call predecessors, (19267), 13939 states have call successors, (19267) [2022-12-14 14:35:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219713 states to 219713 states and 313071 transitions. [2022-12-14 14:35:58,310 INFO L78 Accepts]: Start accepts. Automaton has 219713 states and 313071 transitions. Word has length 156 [2022-12-14 14:35:58,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:35:58,310 INFO L495 AbstractCegarLoop]: Abstraction has 219713 states and 313071 transitions. [2022-12-14 14:35:58,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2022-12-14 14:35:58,311 INFO L276 IsEmpty]: Start isEmpty. Operand 219713 states and 313071 transitions. [2022-12-14 14:35:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 14:35:58,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:35:58,876 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:35:58,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 14:35:59,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 14:35:59,077 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:35:59,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:35:59,078 INFO L85 PathProgramCache]: Analyzing trace with hash 35980262, now seen corresponding path program 1 times [2022-12-14 14:35:59,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:35:59,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031134648] [2022-12-14 14:35:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:35:59,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:35:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:35:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 14:35:59,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:35:59,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031134648] [2022-12-14 14:35:59,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031134648] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:35:59,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934563852] [2022-12-14 14:35:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:35:59,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:35:59,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:35:59,321 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:35:59,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 14:35:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:35:59,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:35:59,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:35:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 14:35:59,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:35:59,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934563852] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:35:59,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:35:59,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:35:59,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505172323] [2022-12-14 14:35:59,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:35:59,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:35:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:35:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:35:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:35:59,459 INFO L87 Difference]: Start difference. First operand 219713 states and 313071 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-12-14 14:36:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:36:11,227 INFO L93 Difference]: Finished difference Result 528049 states and 766304 transitions. [2022-12-14 14:36:11,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:36:11,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 158 [2022-12-14 14:36:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:36:12,242 INFO L225 Difference]: With dead ends: 528049 [2022-12-14 14:36:12,242 INFO L226 Difference]: Without dead ends: 309983 [2022-12-14 14:36:12,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:36:12,510 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 85 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 6456 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:36:12,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 6456 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:36:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309983 states. [2022-12-14 14:36:22,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309983 to 255425. [2022-12-14 14:36:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255425 states, 228829 states have (on average 1.4604835925516433) internal successors, (334201), 229601 states have internal predecessors, (334201), 15091 states have call successors, (15091), 11119 states have call predecessors, (15091), 11503 states have return successors, (20419), 14705 states have call predecessors, (20419), 15091 states have call successors, (20419) [2022-12-14 14:36:23,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255425 states to 255425 states and 369711 transitions. [2022-12-14 14:36:23,465 INFO L78 Accepts]: Start accepts. Automaton has 255425 states and 369711 transitions. Word has length 158 [2022-12-14 14:36:23,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:36:23,466 INFO L495 AbstractCegarLoop]: Abstraction has 255425 states and 369711 transitions. [2022-12-14 14:36:23,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-12-14 14:36:23,466 INFO L276 IsEmpty]: Start isEmpty. Operand 255425 states and 369711 transitions. [2022-12-14 14:36:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 14:36:24,066 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:36:24,066 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:36:24,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 14:36:24,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 14:36:24,268 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:36:24,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:36:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash 8376063, now seen corresponding path program 1 times [2022-12-14 14:36:24,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:36:24,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192371553] [2022-12-14 14:36:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:36:24,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:36:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:36:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 14:36:24,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:36:24,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192371553] [2022-12-14 14:36:24,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192371553] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:36:24,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065090695] [2022-12-14 14:36:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:36:24,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:36:24,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:36:24,494 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:36:24,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 14:36:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:36:24,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:36:24,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:36:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 14:36:24,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:36:24,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065090695] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:36:24,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:36:24,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 14:36:24,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829078981] [2022-12-14 14:36:24,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:36:24,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:36:24,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:36:24,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:36:24,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:36:24,714 INFO L87 Difference]: Start difference. First operand 255425 states and 369711 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:36:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:36:41,126 INFO L93 Difference]: Finished difference Result 629449 states and 909157 transitions. [2022-12-14 14:36:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:36:41,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2022-12-14 14:36:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:36:42,235 INFO L225 Difference]: With dead ends: 629449 [2022-12-14 14:36:42,235 INFO L226 Difference]: Without dead ends: 375671 [2022-12-14 14:36:42,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:36:42,529 INFO L413 NwaCegarLoop]: 3215 mSDtfsCounter, 3780 mSDsluCounter, 6400 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3796 SdHoareTripleChecker+Valid, 9615 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:36:42,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3796 Valid, 9615 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:36:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375671 states. [2022-12-14 14:36:58,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375671 to 375653. [2022-12-14 14:36:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375653 states, 335977 states have (on average 1.4445899570506315) internal successors, (485349), 337133 states have internal predecessors, (485349), 22431 states have call successors, (22431), 16667 states have call predecessors, (22431), 17243 states have return successors, (30319), 21853 states have call predecessors, (30319), 22431 states have call successors, (30319) [2022-12-14 14:37:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375653 states to 375653 states and 538099 transitions. [2022-12-14 14:37:00,182 INFO L78 Accepts]: Start accepts. Automaton has 375653 states and 538099 transitions. Word has length 159 [2022-12-14 14:37:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:00,182 INFO L495 AbstractCegarLoop]: Abstraction has 375653 states and 538099 transitions. [2022-12-14 14:37:00,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:37:00,182 INFO L276 IsEmpty]: Start isEmpty. Operand 375653 states and 538099 transitions. [2022-12-14 14:37:00,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 14:37:00,942 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:00,942 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:00,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 14:37:01,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:01,144 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1843088041, now seen corresponding path program 1 times [2022-12-14 14:37:01,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:01,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647242119] [2022-12-14 14:37:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:01,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 14:37:01,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647242119] [2022-12-14 14:37:01,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647242119] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:37:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028924612] [2022-12-14 14:37:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:01,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:01,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:01,314 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:01,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 14:37:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:37:01,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 14:37:01,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:37:01,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028924612] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:37:01,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:37:01,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 14:37:01,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352653905] [2022-12-14 14:37:01,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:37:01,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:37:01,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:01,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:37:01,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:37:01,522 INFO L87 Difference]: Start difference. First operand 375653 states and 538099 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:37:28,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:28,843 INFO L93 Difference]: Finished difference Result 924965 states and 1321561 transitions. [2022-12-14 14:37:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:37:28,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2022-12-14 14:37:28,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:30,437 INFO L225 Difference]: With dead ends: 924965 [2022-12-14 14:37:30,437 INFO L226 Difference]: Without dead ends: 550959 [2022-12-14 14:37:31,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:37:31,162 INFO L413 NwaCegarLoop]: 3215 mSDtfsCounter, 3778 mSDsluCounter, 6395 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3794 SdHoareTripleChecker+Valid, 9610 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:31,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3794 Valid, 9610 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:37:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550959 states. [2022-12-14 14:37:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550959 to 550925. [2022-12-14 14:37:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550925 states, 491745 states have (on average 1.4264568017976798) internal successors, (701453), 493477 states have internal predecessors, (701453), 33335 states have call successors, (33335), 24979 states have call predecessors, (33335), 25843 states have return successors, (45007), 32469 states have call predecessors, (45007), 33335 states have call successors, (45007) [2022-12-14 14:38:00,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550925 states to 550925 states and 779795 transitions. [2022-12-14 14:38:00,331 INFO L78 Accepts]: Start accepts. Automaton has 550925 states and 779795 transitions. Word has length 161 [2022-12-14 14:38:00,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:38:00,332 INFO L495 AbstractCegarLoop]: Abstraction has 550925 states and 779795 transitions. [2022-12-14 14:38:00,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:38:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand 550925 states and 779795 transitions. [2022-12-14 14:38:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 14:38:01,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:38:01,457 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:38:01,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 14:38:01,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:38:01,660 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:38:01,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:38:01,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1531372331, now seen corresponding path program 1 times [2022-12-14 14:38:01,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:38:01,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36391952] [2022-12-14 14:38:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:38:01,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:38:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:38:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 14:38:01,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:38:01,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36391952] [2022-12-14 14:38:01,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36391952] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:38:01,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967965012] [2022-12-14 14:38:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:38:01,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:38:01,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:38:01,758 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:38:01,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 14:38:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:38:01,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:38:01,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:38:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 14:38:01,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:38:01,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967965012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:38:01,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:38:01,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 14:38:01,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061401612] [2022-12-14 14:38:01,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:38:01,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:38:01,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:38:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:38:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:38:01,877 INFO L87 Difference]: Start difference. First operand 550925 states and 779795 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2022-12-14 14:38:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:38:34,977 INFO L93 Difference]: Finished difference Result 1062997 states and 1517941 transitions. [2022-12-14 14:38:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:38:34,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 158 [2022-12-14 14:38:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:38:37,093 INFO L225 Difference]: With dead ends: 1062997 [2022-12-14 14:38:37,093 INFO L226 Difference]: Without dead ends: 697355 [2022-12-14 14:38:37,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:38:37,771 INFO L413 NwaCegarLoop]: 3321 mSDtfsCounter, 111 mSDsluCounter, 3223 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 6544 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:38:37,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 6544 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:38:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697355 states. [2022-12-14 14:39:08,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697355 to 644237. [2022-12-14 14:39:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644237 states, 578145 states have (on average 1.4484065416115335) internal successors, (837389), 579877 states have internal predecessors, (837389), 36791 states have call successors, (36791), 28435 states have call predecessors, (36791), 29299 states have return successors, (48463), 35925 states have call predecessors, (48463), 36791 states have call successors, (48463) [2022-12-14 14:39:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644237 states to 644237 states and 922643 transitions. [2022-12-14 14:39:11,076 INFO L78 Accepts]: Start accepts. Automaton has 644237 states and 922643 transitions. Word has length 158 [2022-12-14 14:39:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:39:11,076 INFO L495 AbstractCegarLoop]: Abstraction has 644237 states and 922643 transitions. [2022-12-14 14:39:11,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2022-12-14 14:39:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 644237 states and 922643 transitions. [2022-12-14 14:39:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 14:39:12,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:39:12,255 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:39:12,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 14:39:12,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:39:12,456 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:39:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:39:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash 593764943, now seen corresponding path program 1 times [2022-12-14 14:39:12,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:39:12,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468060908] [2022-12-14 14:39:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:12,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:39:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 14:39:12,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:39:12,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468060908] [2022-12-14 14:39:12,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468060908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:39:12,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603336122] [2022-12-14 14:39:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:12,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:39:12,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:39:12,593 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:39:12,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 14:39:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:12,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:39:12,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:39:12,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:39:12,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603336122] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:39:12,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:39:12,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 14:39:12,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923554303] [2022-12-14 14:39:12,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:39:12,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:39:12,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:39:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:39:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:39:12,833 INFO L87 Difference]: Start difference. First operand 644237 states and 922643 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:39:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:39:52,299 INFO L93 Difference]: Finished difference Result 1342669 states and 1891833 transitions. [2022-12-14 14:39:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:39:52,300 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2022-12-14 14:39:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:39:54,412 INFO L225 Difference]: With dead ends: 1342669 [2022-12-14 14:39:54,412 INFO L226 Difference]: Without dead ends: 700079 [2022-12-14 14:39:55,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:39:55,333 INFO L413 NwaCegarLoop]: 3218 mSDtfsCounter, 3782 mSDsluCounter, 6415 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3798 SdHoareTripleChecker+Valid, 9633 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:39:55,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3798 Valid, 9633 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:39:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700079 states. [2022-12-14 14:40:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700079 to 700013. [2022-12-14 14:40:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700013 states, 618673 states have (on average 1.3837503818657029) internal successors, (856089), 621269 states have internal predecessors, (856089), 46071 states have call successors, (46071), 33971 states have call predecessors, (46071), 35267 states have return successors, (63331), 44773 states have call predecessors, (63331), 46071 states have call successors, (63331) [2022-12-14 14:40:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700013 states to 700013 states and 965491 transitions. [2022-12-14 14:40:36,488 INFO L78 Accepts]: Start accepts. Automaton has 700013 states and 965491 transitions. Word has length 159 [2022-12-14 14:40:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:40:36,489 INFO L495 AbstractCegarLoop]: Abstraction has 700013 states and 965491 transitions. [2022-12-14 14:40:36,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:40:36,489 INFO L276 IsEmpty]: Start isEmpty. Operand 700013 states and 965491 transitions. [2022-12-14 14:40:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-12-14 14:40:37,757 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:40:37,757 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:40:37,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 14:40:37,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:37,959 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:40:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:40:37,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1322521571, now seen corresponding path program 1 times [2022-12-14 14:40:37,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:40:37,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853539390] [2022-12-14 14:40:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:40:37,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:40:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 14:40:38,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:40:38,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853539390] [2022-12-14 14:40:38,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853539390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:40:38,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148516367] [2022-12-14 14:40:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:40:38,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:40:38,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:40:38,119 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:40:38,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 14:40:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:40:38,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 14:40:38,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:40:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 14:40:38,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:40:38,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148516367] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:40:38,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:40:38,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 14:40:38,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929286878] [2022-12-14 14:40:38,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:40:38,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:40:38,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:40:38,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:40:38,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:40:38,295 INFO L87 Difference]: Start difference. First operand 700013 states and 965491 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:41:18,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:41:18,564 INFO L93 Difference]: Finished difference Result 988688 states and 1358832 transitions. [2022-12-14 14:41:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:41:18,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 160 [2022-12-14 14:41:18,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:41:20,809 INFO L225 Difference]: With dead ends: 988688 [2022-12-14 14:41:20,809 INFO L226 Difference]: Without dead ends: 748902 [2022-12-14 14:41:21,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:41:21,370 INFO L413 NwaCegarLoop]: 3309 mSDtfsCounter, 3456 mSDsluCounter, 3432 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3456 SdHoareTripleChecker+Valid, 6741 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:41:21,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 6741 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:41:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748902 states. [2022-12-14 14:42:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748902 to 724685. [2022-12-14 14:42:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724685 states, 641463 states have (on average 1.378350738857892) internal successors, (884161), 645066 states have internal predecessors, (884161), 46077 states have call successors, (46077), 33975 states have call predecessors, (46077), 37143 states have return successors, (66073), 45644 states have call predecessors, (66073), 46077 states have call successors, (66073) [2022-12-14 14:42:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724685 states to 724685 states and 996311 transitions. [2022-12-14 14:42:05,115 INFO L78 Accepts]: Start accepts. Automaton has 724685 states and 996311 transitions. Word has length 160 [2022-12-14 14:42:05,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:42:05,115 INFO L495 AbstractCegarLoop]: Abstraction has 724685 states and 996311 transitions. [2022-12-14 14:42:05,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:42:05,115 INFO L276 IsEmpty]: Start isEmpty. Operand 724685 states and 996311 transitions. [2022-12-14 14:42:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 14:42:06,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:42:06,442 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:42:06,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 14:42:06,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:42:06,645 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:42:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:42:06,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1185114666, now seen corresponding path program 1 times [2022-12-14 14:42:06,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:42:06,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301045663] [2022-12-14 14:42:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:42:06,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:42:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:42:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 14:42:06,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:42:06,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301045663] [2022-12-14 14:42:06,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301045663] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:42:06,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162260036] [2022-12-14 14:42:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:42:06,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:42:06,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:42:06,894 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:42:06,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 14:42:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:42:06,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:42:06,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:42:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 14:42:07,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:42:07,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162260036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:42:07,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:42:07,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:42:07,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150071082] [2022-12-14 14:42:07,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:42:07,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:42:07,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:42:07,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:42:07,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:42:07,013 INFO L87 Difference]: Start difference. First operand 724685 states and 996311 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2022-12-14 14:42:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:42:44,054 INFO L93 Difference]: Finished difference Result 975043 states and 1344850 transitions. [2022-12-14 14:42:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:42:44,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 161 [2022-12-14 14:42:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:42:46,186 INFO L225 Difference]: With dead ends: 975043 [2022-12-14 14:42:46,187 INFO L226 Difference]: Without dead ends: 697493 [2022-12-14 14:42:46,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:42:46,699 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 45 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6449 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:42:46,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 6449 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:42:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697493 states. [2022-12-14 14:43:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697493 to 662957. [2022-12-14 14:43:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662957 states, 585207 states have (on average 1.3922475295066532) internal successors, (814753), 587226 states have internal predecessors, (814753), 44349 states have call successors, (44349), 32247 states have call predecessors, (44349), 33399 states have return successors, (60601), 43484 states have call predecessors, (60601), 44349 states have call successors, (60601) [2022-12-14 14:43:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662957 states to 662957 states and 919703 transitions. [2022-12-14 14:43:26,251 INFO L78 Accepts]: Start accepts. Automaton has 662957 states and 919703 transitions. Word has length 161 [2022-12-14 14:43:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:26,251 INFO L495 AbstractCegarLoop]: Abstraction has 662957 states and 919703 transitions. [2022-12-14 14:43:26,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2022-12-14 14:43:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 662957 states and 919703 transitions. [2022-12-14 14:43:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 14:43:27,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:27,490 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:43:27,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 14:43:27,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 14:43:27,692 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:27,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:27,693 INFO L85 PathProgramCache]: Analyzing trace with hash -25600697, now seen corresponding path program 1 times [2022-12-14 14:43:27,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:27,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606328512] [2022-12-14 14:43:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:27,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 14:43:27,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:27,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606328512] [2022-12-14 14:43:27,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606328512] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:43:27,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800655381] [2022-12-14 14:43:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:27,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:27,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:43:27,862 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:43:27,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98d5fe15-4dd0-4d5d-a8fb-94b1838a006b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 14:43:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:27,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:43:27,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:43:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 14:43:28,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:43:28,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800655381] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:28,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:43:28,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 14:43:28,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363955970] [2022-12-14 14:43:28,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:28,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:43:28,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:28,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:43:28,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:43:28,035 INFO L87 Difference]: Start difference. First operand 662957 states and 919703 transitions. Second operand has 6 states, 5 states have (on average 22.0) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)