./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+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_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/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_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/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_17da19d0-98d2-4191-a33e-2201f8aabcad/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 54f1be55645106b43145d214f59b6f833268ce7c7f84e399c536bf03a2c9679b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:10:18,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:10:18,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:10:18,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:10:18,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:10:18,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:10:18,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:10:18,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:10:18,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:10:18,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:10:18,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:10:18,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:10:18,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:10:18,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:10:18,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:10:18,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:10:18,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:10:18,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:10:18,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:10:18,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:10:18,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:10:18,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:10:18,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:10:18,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:10:18,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:10:18,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:10:18,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:10:18,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:10:18,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:10:18,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:10:18,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:10:18,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:10:18,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:10:18,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:10:18,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:10:18,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:10:18,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:10:18,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:10:18,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:10:18,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:10:18,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:10:18,958 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:10:18,978 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:10:18,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:10:18,978 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:10:18,978 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:10:18,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:10:18,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:10:18,984 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:10:18,984 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:10:18,984 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:10:18,984 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:10:18,985 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:10:18,985 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:10:18,985 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:10:18,985 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:10:18,985 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:10:18,985 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:10:18,986 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:10:18,986 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:10:18,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:10:18,987 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:10:18,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:10:18,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:10:18,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:10:18,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:10:18,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:10:18,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:10:18,988 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:10:18,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:10:18,988 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:10:18,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:10:18,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:10:18,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:10:18,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:10:18,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:10:18,989 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:10:18,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:10:18,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:10:18,990 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:10:18,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:10:18,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:10:18,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:10:18,990 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_17da19d0-98d2-4191-a33e-2201f8aabcad/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54f1be55645106b43145d214f59b6f833268ce7c7f84e399c536bf03a2c9679b [2022-12-14 05:10:19,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:10:19,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:10:19,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:10:19,184 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:10:19,184 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:10:19,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c [2022-12-14 05:10:21,685 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:10:22,122 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:10:22,122 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c [2022-12-14 05:10:22,163 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/data/c7e282e35/9e2fa80bd0a846db97facf4a5d12556b/FLAG3bf026187 [2022-12-14 05:10:22,255 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/data/c7e282e35/9e2fa80bd0a846db97facf4a5d12556b [2022-12-14 05:10:22,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:10:22,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:10:22,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:10:22,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:10:22,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:10:22,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:10:22" (1/1) ... [2022-12-14 05:10:22,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a24c7f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:22, skipping insertion in model container [2022-12-14 05:10:22,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:10:22" (1/1) ... [2022-12-14 05:10:22,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:10:22,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:10:23,730 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_17da19d0-98d2-4191-a33e-2201f8aabcad/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c[381679,381692] [2022-12-14 05:10:23,749 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_17da19d0-98d2-4191-a33e-2201f8aabcad/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c[383339,383352] [2022-12-14 05:10:23,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:10:23,934 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:10:24,733 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_17da19d0-98d2-4191-a33e-2201f8aabcad/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c[381679,381692] [2022-12-14 05:10:24,736 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_17da19d0-98d2-4191-a33e-2201f8aabcad/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c[383339,383352] [2022-12-14 05:10:24,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:10:24,780 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:10:24,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24 WrapperNode [2022-12-14 05:10:24,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:10:24,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:10:24,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:10:24,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:10:24,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24" (1/1) ... [2022-12-14 05:10:24,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24" (1/1) ... [2022-12-14 05:10:25,123 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12909 [2022-12-14 05:10:25,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:10:25,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:10:25,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:10:25,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:10:25,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24" (1/1) ... [2022-12-14 05:10:25,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24" (1/1) ... [2022-12-14 05:10:25,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24" (1/1) ... [2022-12-14 05:10:25,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24" (1/1) ... [2022-12-14 05:10:25,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24" (1/1) ... [2022-12-14 05:10:25,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24" (1/1) ... [2022-12-14 05:10:25,428 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24" (1/1) ... [2022-12-14 05:10:25,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24" (1/1) ... [2022-12-14 05:10:25,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:10:25,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:10:25,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:10:25,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:10:25,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24" (1/1) ... [2022-12-14 05:10:25,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:10:25,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:25,575 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:10:25,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:10:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:10:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 05:10:25,609 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 05:10:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 05:10:25,609 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 05:10:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 05:10:25,609 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 05:10:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 05:10:25,610 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 05:10:25,610 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 05:10:25,610 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 05:10:25,610 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 05:10:25,610 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 05:10:25,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:10:25,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:10:25,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:10:25,715 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:10:25,717 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:10:31,257 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:10:32,678 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:10:32,678 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-14 05:10:32,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:10:32 BoogieIcfgContainer [2022-12-14 05:10:32,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:10:32,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:10:32,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:10:32,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:10:32,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:10:22" (1/3) ... [2022-12-14 05:10:32,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb6a9dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:10:32, skipping insertion in model container [2022-12-14 05:10:32,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:24" (2/3) ... [2022-12-14 05:10:32,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb6a9dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:10:32, skipping insertion in model container [2022-12-14 05:10:32,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:10:32" (3/3) ... [2022-12-14 05:10:32,688 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.07.cil-1.c [2022-12-14 05:10:32,701 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:10:32,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 05:10:32,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:10:32,765 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;@58630796, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:10:32,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 05:10:32,774 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 05:10:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 05:10:32,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:32,782 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 05:10:32,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:32,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1224944951, now seen corresponding path program 1 times [2022-12-14 05:10:32,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:32,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745604500] [2022-12-14 05:10:32,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:32,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:10:33,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:33,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745604500] [2022-12-14 05:10:33,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745604500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:33,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:10:33,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:10:33,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284982172] [2022-12-14 05:10:33,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:33,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:10:33,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:33,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:10:33,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:10:33,085 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 05:10:33,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:33,782 INFO L93 Difference]: Finished difference Result 3668 states and 7147 transitions. [2022-12-14 05:10:33,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:10:33,784 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 05:10:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:33,803 INFO L225 Difference]: With dead ends: 3668 [2022-12-14 05:10:33,803 INFO L226 Difference]: Without dead ends: 1891 [2022-12-14 05:10:33,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:10:33,814 INFO L413 NwaCegarLoop]: 3361 mSDtfsCounter, 3614 mSDsluCounter, 3283 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 05:10:33,814 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 05:10:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-12-14 05:10:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1890. [2022-12-14 05:10:33,912 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 05:10:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 3636 transitions. [2022-12-14 05:10:33,923 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 3636 transitions. Word has length 52 [2022-12-14 05:10:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:33,924 INFO L495 AbstractCegarLoop]: Abstraction has 1890 states and 3636 transitions. [2022-12-14 05:10:33,924 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 05:10:33,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 3636 transitions. [2022-12-14 05:10:33,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 05:10:33,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:33,929 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 05:10:33,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:10:33,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:33,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:33,930 INFO L85 PathProgramCache]: Analyzing trace with hash 973190522, now seen corresponding path program 1 times [2022-12-14 05:10:33,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:33,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483886794] [2022-12-14 05:10:33,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:33,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:34,119 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 05:10:34,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:34,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483886794] [2022-12-14 05:10:34,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483886794] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:34,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891890643] [2022-12-14 05:10:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:34,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:34,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:34,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:34,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:10:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:34,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:10:34,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:34,303 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 05:10:34,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:34,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891890643] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:34,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:34,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:10:34,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211649963] [2022-12-14 05:10:34,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:34,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:34,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:34,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:34,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:10:34,306 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 05:10:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:34,714 INFO L93 Difference]: Finished difference Result 2371 states and 4365 transitions. [2022-12-14 05:10:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:34,715 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 05:10:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:34,723 INFO L225 Difference]: With dead ends: 2371 [2022-12-14 05:10:34,724 INFO L226 Difference]: Without dead ends: 2127 [2022-12-14 05:10:34,725 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 05:10:34,725 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 05:10:34,726 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 05:10:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-12-14 05:10:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2123. [2022-12-14 05:10:34,763 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 05:10:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3977 transitions. [2022-12-14 05:10:34,769 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3977 transitions. Word has length 101 [2022-12-14 05:10:34,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:34,770 INFO L495 AbstractCegarLoop]: Abstraction has 2123 states and 3977 transitions. [2022-12-14 05:10:34,770 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 05:10:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3977 transitions. [2022-12-14 05:10:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 05:10:34,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:34,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:34,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:10:34,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:34,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:34,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:34,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1476256060, now seen corresponding path program 1 times [2022-12-14 05:10:34,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:34,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586918852] [2022-12-14 05:10:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:34,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:35,063 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 05:10:35,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:35,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586918852] [2022-12-14 05:10:35,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586918852] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:35,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335595546] [2022-12-14 05:10:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:35,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:35,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:35,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:35,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:10:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:35,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:10:35,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:35,238 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 05:10:35,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:35,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335595546] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:35,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:35,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:10:35,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126837196] [2022-12-14 05:10:35,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:35,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:35,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:10:35,240 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 05:10:35,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:35,630 INFO L93 Difference]: Finished difference Result 3064 states and 5396 transitions. [2022-12-14 05:10:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:35,631 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 05:10:35,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:35,641 INFO L225 Difference]: With dead ends: 3064 [2022-12-14 05:10:35,641 INFO L226 Difference]: Without dead ends: 2587 [2022-12-14 05:10:35,644 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 05:10:35,644 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 05:10:35,645 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 05:10:35,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-12-14 05:10:35,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2581. [2022-12-14 05:10:35,695 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 05:10:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 4643 transitions. [2022-12-14 05:10:35,702 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 4643 transitions. Word has length 101 [2022-12-14 05:10:35,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:35,702 INFO L495 AbstractCegarLoop]: Abstraction has 2581 states and 4643 transitions. [2022-12-14 05:10:35,703 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 05:10:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 4643 transitions. [2022-12-14 05:10:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 05:10:35,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:35,705 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 05:10:35,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:10:35,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:35,906 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:35,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1134164422, now seen corresponding path program 1 times [2022-12-14 05:10:35,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:35,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622379057] [2022-12-14 05:10:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:35,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:35,996 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 05:10:35,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:35,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622379057] [2022-12-14 05:10:35,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622379057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:35,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605629027] [2022-12-14 05:10:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:35,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:35,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:35,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:35,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:10:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:36,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:10:36,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:36,148 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 05:10:36,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:36,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605629027] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:36,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:36,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:10:36,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319471952] [2022-12-14 05:10:36,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:36,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:36,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:36,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:36,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:10:36,150 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 05:10:36,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:36,543 INFO L93 Difference]: Finished difference Result 4426 states and 7408 transitions. [2022-12-14 05:10:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:36,543 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 05:10:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:36,558 INFO L225 Difference]: With dead ends: 4426 [2022-12-14 05:10:36,558 INFO L226 Difference]: Without dead ends: 3491 [2022-12-14 05:10:36,561 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 05:10:36,562 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 05:10:36,563 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 05:10:36,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2022-12-14 05:10:36,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 3481. [2022-12-14 05:10:36,646 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 05:10:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5943 transitions. [2022-12-14 05:10:36,656 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5943 transitions. Word has length 101 [2022-12-14 05:10:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:36,656 INFO L495 AbstractCegarLoop]: Abstraction has 3481 states and 5943 transitions. [2022-12-14 05:10:36,657 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 05:10:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5943 transitions. [2022-12-14 05:10:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 05:10:36,660 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:36,661 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 05:10:36,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:10:36,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:36,861 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:36,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:36,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1725344636, now seen corresponding path program 1 times [2022-12-14 05:10:36,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:36,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444085941] [2022-12-14 05:10:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:36,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:37,005 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 05:10:37,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:37,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444085941] [2022-12-14 05:10:37,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444085941] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:37,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891764779] [2022-12-14 05:10:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:37,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:37,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:37,007 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:37,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:10:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:37,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:10:37,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:37,155 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 05:10:37,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:37,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891764779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:37,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:37,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 05:10:37,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944577588] [2022-12-14 05:10:37,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:37,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:37,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:10:37,158 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 05:10:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:37,615 INFO L93 Difference]: Finished difference Result 7102 states and 11332 transitions. [2022-12-14 05:10:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:37,615 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 05:10:37,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:37,633 INFO L225 Difference]: With dead ends: 7102 [2022-12-14 05:10:37,633 INFO L226 Difference]: Without dead ends: 5267 [2022-12-14 05:10:37,639 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 05:10:37,639 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 05:10:37,639 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 05:10:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2022-12-14 05:10:37,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 5249. [2022-12-14 05:10:37,814 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 05:10:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5249 states to 5249 states and 8479 transitions. [2022-12-14 05:10:37,824 INFO L78 Accepts]: Start accepts. Automaton has 5249 states and 8479 transitions. Word has length 101 [2022-12-14 05:10:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:37,825 INFO L495 AbstractCegarLoop]: Abstraction has 5249 states and 8479 transitions. [2022-12-14 05:10:37,825 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 05:10:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 5249 states and 8479 transitions. [2022-12-14 05:10:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 05:10:37,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:37,829 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 05:10:37,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 05:10:38,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:38,030 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:38,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1190455870, now seen corresponding path program 1 times [2022-12-14 05:10:38,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:38,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538710031] [2022-12-14 05:10:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:38,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:38,180 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 05:10:38,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:38,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538710031] [2022-12-14 05:10:38,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538710031] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:38,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:10:38,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:10:38,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792725835] [2022-12-14 05:10:38,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:38,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:38,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:38,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:38,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:10:38,183 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 05:10:38,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:38,642 INFO L93 Difference]: Finished difference Result 8051 states and 12672 transitions. [2022-12-14 05:10:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:38,643 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 05:10:38,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:38,669 INFO L225 Difference]: With dead ends: 8051 [2022-12-14 05:10:38,669 INFO L226 Difference]: Without dead ends: 6209 [2022-12-14 05:10:38,677 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 05:10:38,678 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 05:10:38,678 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 05:10:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2022-12-14 05:10:38,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 5889. [2022-12-14 05:10:38,810 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 05:10:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 9551 transitions. [2022-12-14 05:10:38,821 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 9551 transitions. Word has length 101 [2022-12-14 05:10:38,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:38,822 INFO L495 AbstractCegarLoop]: Abstraction has 5889 states and 9551 transitions. [2022-12-14 05:10:38,822 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 05:10:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 9551 transitions. [2022-12-14 05:10:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 05:10:38,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:38,829 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 05:10:38,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 05:10:38,829 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:38,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1177539360, now seen corresponding path program 1 times [2022-12-14 05:10:38,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:38,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857036863] [2022-12-14 05:10:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:38,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:38,887 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 05:10:38,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857036863] [2022-12-14 05:10:38,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857036863] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:38,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:10:38,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:10:38,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440067837] [2022-12-14 05:10:38,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:38,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:38,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:38,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:10:38,890 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 05:10:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:39,449 INFO L93 Difference]: Finished difference Result 14230 states and 22100 transitions. [2022-12-14 05:10:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:39,449 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 05:10:39,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:39,477 INFO L225 Difference]: With dead ends: 14230 [2022-12-14 05:10:39,477 INFO L226 Difference]: Without dead ends: 9987 [2022-12-14 05:10:39,485 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 05:10:39,486 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3427 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 05:10:39,486 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 05:10:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2022-12-14 05:10:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 9937. [2022-12-14 05:10:39,709 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 05:10:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9937 states to 9937 states and 15439 transitions. [2022-12-14 05:10:39,728 INFO L78 Accepts]: Start accepts. Automaton has 9937 states and 15439 transitions. Word has length 136 [2022-12-14 05:10:39,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:39,728 INFO L495 AbstractCegarLoop]: Abstraction has 9937 states and 15439 transitions. [2022-12-14 05:10:39,729 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 05:10:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 9937 states and 15439 transitions. [2022-12-14 05:10:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 05:10:39,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:39,742 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 05:10:39,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 05:10:39,742 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:39,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:39,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1058886168, now seen corresponding path program 1 times [2022-12-14 05:10:39,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:39,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875228535] [2022-12-14 05:10:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:39,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:39,798 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 05:10:39,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:39,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875228535] [2022-12-14 05:10:39,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875228535] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:39,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:10:39,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:10:39,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011142097] [2022-12-14 05:10:39,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:39,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:39,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:39,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:39,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:10:39,801 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 05:10:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:40,636 INFO L93 Difference]: Finished difference Result 26230 states and 39732 transitions. [2022-12-14 05:10:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:40,637 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 05:10:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:40,688 INFO L225 Difference]: With dead ends: 26230 [2022-12-14 05:10:40,688 INFO L226 Difference]: Without dead ends: 17939 [2022-12-14 05:10:40,708 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 05:10:40,708 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 05:10:40,708 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 05:10:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17939 states. [2022-12-14 05:10:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17939 to 17841. [2022-12-14 05:10:41,195 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 05:10:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17841 states to 17841 states and 26831 transitions. [2022-12-14 05:10:41,238 INFO L78 Accepts]: Start accepts. Automaton has 17841 states and 26831 transitions. Word has length 136 [2022-12-14 05:10:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:41,239 INFO L495 AbstractCegarLoop]: Abstraction has 17841 states and 26831 transitions. [2022-12-14 05:10:41,239 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 05:10:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 17841 states and 26831 transitions. [2022-12-14 05:10:41,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 05:10:41,268 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:41,268 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 05:10:41,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 05:10:41,268 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash 878563429, now seen corresponding path program 1 times [2022-12-14 05:10:41,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:41,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155167389] [2022-12-14 05:10:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:41,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:41,325 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 05:10:41,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:41,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155167389] [2022-12-14 05:10:41,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155167389] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:41,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:10:41,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:10:41,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220172597] [2022-12-14 05:10:41,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:41,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:41,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:10:41,328 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 05:10:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:42,398 INFO L93 Difference]: Finished difference Result 49654 states and 73812 transitions. [2022-12-14 05:10:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:42,398 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 05:10:42,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:42,469 INFO L225 Difference]: With dead ends: 49654 [2022-12-14 05:10:42,469 INFO L226 Difference]: Without dead ends: 33459 [2022-12-14 05:10:42,497 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 05:10:42,497 INFO L413 NwaCegarLoop]: 3240 mSDtfsCounter, 3432 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 05:10:42,497 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 05:10:42,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33459 states. [2022-12-14 05:10:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33459 to 33265. [2022-12-14 05:10:43,316 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 05:10:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33265 states to 33265 states and 48847 transitions. [2022-12-14 05:10:43,379 INFO L78 Accepts]: Start accepts. Automaton has 33265 states and 48847 transitions. Word has length 136 [2022-12-14 05:10:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:43,379 INFO L495 AbstractCegarLoop]: Abstraction has 33265 states and 48847 transitions. [2022-12-14 05:10:43,380 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 05:10:43,380 INFO L276 IsEmpty]: Start isEmpty. Operand 33265 states and 48847 transitions. [2022-12-14 05:10:43,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:10:43,439 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:43,439 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 05:10:43,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 05:10:43,439 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:43,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:43,439 INFO L85 PathProgramCache]: Analyzing trace with hash -161090355, now seen corresponding path program 1 times [2022-12-14 05:10:43,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:43,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285032830] [2022-12-14 05:10:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:43,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:43,494 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 05:10:43,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:43,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285032830] [2022-12-14 05:10:43,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285032830] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:43,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:10:43,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:10:43,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896651415] [2022-12-14 05:10:43,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:43,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:43,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:43,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:43,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:10:43,496 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 05:10:45,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:45,259 INFO L93 Difference]: Finished difference Result 84725 states and 125265 transitions. [2022-12-14 05:10:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:45,260 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 05:10:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:45,386 INFO L225 Difference]: With dead ends: 84725 [2022-12-14 05:10:45,386 INFO L226 Difference]: Without dead ends: 53107 [2022-12-14 05:10:45,437 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 05:10:45,437 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, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:45,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6475 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:10:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53107 states. [2022-12-14 05:10:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53107 to 46585. [2022-12-14 05:10:46,892 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 05:10:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 70743 transitions. [2022-12-14 05:10:46,976 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 70743 transitions. Word has length 156 [2022-12-14 05:10:46,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:46,976 INFO L495 AbstractCegarLoop]: Abstraction has 46585 states and 70743 transitions. [2022-12-14 05:10:46,976 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 05:10:46,976 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 70743 transitions. [2022-12-14 05:10:47,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:10:47,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:47,041 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 05:10:47,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 05:10:47,041 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:47,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1240150307, now seen corresponding path program 2 times [2022-12-14 05:10:47,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:47,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556074701] [2022-12-14 05:10:47,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:47,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:47,129 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 05:10:47,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:47,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556074701] [2022-12-14 05:10:47,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556074701] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:47,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182229026] [2022-12-14 05:10:47,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:10:47,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:47,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:47,131 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:47,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:10:47,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 05:10:47,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:10:47,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:10:47,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:47,296 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 05:10:47,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:47,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182229026] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:47,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:47,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 05:10:47,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052552370] [2022-12-14 05:10:47,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:47,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:47,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:47,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:47,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:10:47,298 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 05:10:49,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:49,448 INFO L93 Difference]: Finished difference Result 87933 states and 133849 transitions. [2022-12-14 05:10:49,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:49,449 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 05:10:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:49,571 INFO L225 Difference]: With dead ends: 87933 [2022-12-14 05:10:49,571 INFO L226 Difference]: Without dead ends: 65083 [2022-12-14 05:10:49,601 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 05:10:49,601 INFO L413 NwaCegarLoop]: 3334 mSDtfsCounter, 125 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 05:10:49,601 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 05:10:49,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65083 states. [2022-12-14 05:10:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65083 to 59129. [2022-12-14 05:10:51,203 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 05:10:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59129 states to 59129 states and 91095 transitions. [2022-12-14 05:10:51,320 INFO L78 Accepts]: Start accepts. Automaton has 59129 states and 91095 transitions. Word has length 156 [2022-12-14 05:10:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:51,320 INFO L495 AbstractCegarLoop]: Abstraction has 59129 states and 91095 transitions. [2022-12-14 05:10:51,320 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 05:10:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 59129 states and 91095 transitions. [2022-12-14 05:10:51,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:10:51,391 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:51,391 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 05:10:51,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:10:51,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 05:10:51,593 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:51,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash -904042516, now seen corresponding path program 3 times [2022-12-14 05:10:51,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:51,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577856251] [2022-12-14 05:10:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:51,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:51,827 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 05:10:51,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:51,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577856251] [2022-12-14 05:10:51,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577856251] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:51,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428767539] [2022-12-14 05:10:51,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:10:51,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:51,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:51,829 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:51,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:10:51,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:10:51,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:10:51,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:10:51,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:51,973 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 05:10:51,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:51,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428767539] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:51,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:51,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:10:51,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383162515] [2022-12-14 05:10:51,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:51,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:51,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:10:51,975 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 05:10:54,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:54,148 INFO L93 Difference]: Finished difference Result 88477 states and 137113 transitions. [2022-12-14 05:10:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:54,148 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 05:10:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:54,280 INFO L225 Difference]: With dead ends: 88477 [2022-12-14 05:10:54,281 INFO L226 Difference]: Without dead ends: 59259 [2022-12-14 05:10:54,334 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 05:10:54,335 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 166 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:54,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 6559 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:10:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2022-12-14 05:10:56,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 58809. [2022-12-14 05:10:56,274 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 05:10:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58809 states to 58809 states and 90071 transitions. [2022-12-14 05:10:56,378 INFO L78 Accepts]: Start accepts. Automaton has 58809 states and 90071 transitions. Word has length 156 [2022-12-14 05:10:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:56,379 INFO L495 AbstractCegarLoop]: Abstraction has 58809 states and 90071 transitions. [2022-12-14 05:10:56,379 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 05:10:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 58809 states and 90071 transitions. [2022-12-14 05:10:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:10:56,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:56,445 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 05:10:56,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 05:10:56,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:56,647 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:56,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1427363187, now seen corresponding path program 1 times [2022-12-14 05:10:56,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:56,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647892772] [2022-12-14 05:10:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:56,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:56,863 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 05:10:56,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:56,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647892772] [2022-12-14 05:10:56,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647892772] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:56,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927257057] [2022-12-14 05:10:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:56,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:56,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:56,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:56,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:10:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:57,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:10:57,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:57,060 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 05:10:57,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:57,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927257057] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:57,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:57,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:10:57,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372970464] [2022-12-14 05:10:57,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:57,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:57,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:57,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:57,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:10:57,062 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 05:10:59,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:59,106 INFO L93 Difference]: Finished difference Result 95989 states and 144626 transitions. [2022-12-14 05:10:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:59,107 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 05:10:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:59,233 INFO L225 Difference]: With dead ends: 95989 [2022-12-14 05:10:59,233 INFO L226 Difference]: Without dead ends: 67251 [2022-12-14 05:10:59,279 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 05:10:59,279 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 05:10:59,280 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 05:10:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67251 states. [2022-12-14 05:11:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67251 to 67251. [2022-12-14 05:11:01,170 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 05:11:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67251 states to 67251 states and 99921 transitions. [2022-12-14 05:11:01,295 INFO L78 Accepts]: Start accepts. Automaton has 67251 states and 99921 transitions. Word has length 156 [2022-12-14 05:11:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:01,296 INFO L495 AbstractCegarLoop]: Abstraction has 67251 states and 99921 transitions. [2022-12-14 05:11:01,296 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 05:11:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 67251 states and 99921 transitions. [2022-12-14 05:11:01,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:11:01,372 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:01,372 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 05:11:01,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 05:11:01,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 05:11:01,574 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:01,575 INFO L85 PathProgramCache]: Analyzing trace with hash 471490229, now seen corresponding path program 1 times [2022-12-14 05:11:01,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:01,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701739268] [2022-12-14 05:11:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:01,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:01,757 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 05:11:01,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:01,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701739268] [2022-12-14 05:11:01,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701739268] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:01,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493361687] [2022-12-14 05:11:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:01,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:01,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:01,759 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:01,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:11:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:01,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:11:01,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:01,974 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 05:11:01,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:01,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493361687] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:01,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:01,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 05:11:01,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213485186] [2022-12-14 05:11:01,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:01,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:11:01,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:11:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:11:01,976 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 05:11:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:06,540 INFO L93 Difference]: Finished difference Result 199673 states and 294097 transitions. [2022-12-14 05:11:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:11:06,540 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 05:11:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:06,854 INFO L225 Difference]: With dead ends: 199673 [2022-12-14 05:11:06,855 INFO L226 Difference]: Without dead ends: 134069 [2022-12-14 05:11:06,940 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 05:11:06,941 INFO L413 NwaCegarLoop]: 3384 mSDtfsCounter, 3460 mSDsluCounter, 3511 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 05:11:06,941 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 05:11:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134069 states. [2022-12-14 05:11:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134069 to 133547. [2022-12-14 05:11:11,287 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 05:11:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133547 states to 133547 states and 195781 transitions. [2022-12-14 05:11:11,646 INFO L78 Accepts]: Start accepts. Automaton has 133547 states and 195781 transitions. Word has length 156 [2022-12-14 05:11:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:11,646 INFO L495 AbstractCegarLoop]: Abstraction has 133547 states and 195781 transitions. [2022-12-14 05:11:11,646 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 05:11:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 133547 states and 195781 transitions. [2022-12-14 05:11:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:11:11,908 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:11,908 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 05:11:11,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:11:12,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 05:11:12,110 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:12,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:12,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1370823562, now seen corresponding path program 2 times [2022-12-14 05:11:12,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:12,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227419714] [2022-12-14 05:11:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:12,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:12,313 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 05:11:12,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:12,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227419714] [2022-12-14 05:11:12,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227419714] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:12,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126857605] [2022-12-14 05:11:12,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:11:12,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:12,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:12,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:12,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:11:12,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 05:11:12,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:11:12,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:11:12,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:12,462 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 05:11:12,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:12,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126857605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:12,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:12,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:11:12,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832579821] [2022-12-14 05:11:12,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:12,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:12,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:11:12,464 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 05:11:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:17,889 INFO L93 Difference]: Finished difference Result 265697 states and 395369 transitions. [2022-12-14 05:11:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:17,890 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 05:11:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:18,359 INFO L225 Difference]: With dead ends: 265697 [2022-12-14 05:11:18,360 INFO L226 Difference]: Without dead ends: 196581 [2022-12-14 05:11:18,507 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 05:11:18,507 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3421 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 05:11:18,507 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 05:11:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196581 states. [2022-12-14 05:11:25,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196581 to 195167. [2022-12-14 05:11:25,365 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 05:11:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195167 states to 195167 states and 287093 transitions. [2022-12-14 05:11:25,879 INFO L78 Accepts]: Start accepts. Automaton has 195167 states and 287093 transitions. Word has length 156 [2022-12-14 05:11:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:25,879 INFO L495 AbstractCegarLoop]: Abstraction has 195167 states and 287093 transitions. [2022-12-14 05:11:25,880 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 05:11:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 195167 states and 287093 transitions. [2022-12-14 05:11:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:11:26,174 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:26,174 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 05:11:26,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 05:11:26,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 05:11:26,376 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:26,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1509573900, now seen corresponding path program 3 times [2022-12-14 05:11:26,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:26,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487735894] [2022-12-14 05:11:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:26,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:26,633 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 05:11:26,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:26,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487735894] [2022-12-14 05:11:26,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487735894] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:26,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627384030] [2022-12-14 05:11:26,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:11:26,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:26,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:26,635 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:26,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:11:26,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:11:26,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:11:26,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:11:26,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:26,812 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 05:11:26,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:26,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627384030] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:26,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:26,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:11:26,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286726786] [2022-12-14 05:11:26,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:26,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:26,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:26,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:26,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:11:26,815 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 05:11:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:33,723 INFO L93 Difference]: Finished difference Result 338123 states and 498008 transitions. [2022-12-14 05:11:33,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:33,724 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 05:11:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:34,291 INFO L225 Difference]: With dead ends: 338123 [2022-12-14 05:11:34,291 INFO L226 Difference]: Without dead ends: 222665 [2022-12-14 05:11:34,449 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 05:11:34,449 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 05:11:34,450 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 05:11:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222665 states. [2022-12-14 05:11:42,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222665 to 221697. [2022-12-14 05:11:42,228 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 05:11:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221697 states to 221697 states and 318703 transitions. [2022-12-14 05:11:42,722 INFO L78 Accepts]: Start accepts. Automaton has 221697 states and 318703 transitions. Word has length 156 [2022-12-14 05:11:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:42,723 INFO L495 AbstractCegarLoop]: Abstraction has 221697 states and 318703 transitions. [2022-12-14 05:11:42,723 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 05:11:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand 221697 states and 318703 transitions. [2022-12-14 05:11:43,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:11:43,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:43,038 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 05:11:43,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 05:11:43,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 05:11:43,240 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:43,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:43,241 INFO L85 PathProgramCache]: Analyzing trace with hash -470597292, now seen corresponding path program 1 times [2022-12-14 05:11:43,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:43,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744686781] [2022-12-14 05:11:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:43,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:43,421 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 05:11:43,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:43,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744686781] [2022-12-14 05:11:43,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744686781] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:43,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467928501] [2022-12-14 05:11:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:43,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:43,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:43,423 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:43,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 05:11:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:43,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:11:43,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:43,588 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 05:11:43,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:43,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467928501] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:43,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:43,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:11:43,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739905944] [2022-12-14 05:11:43,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:43,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:43,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:43,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:43,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:11:43,590 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 05:11:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:51,484 INFO L93 Difference]: Finished difference Result 350597 states and 513617 transitions. [2022-12-14 05:11:51,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:51,485 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 05:11:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:52,071 INFO L225 Difference]: With dead ends: 350597 [2022-12-14 05:11:52,072 INFO L226 Difference]: Without dead ends: 221635 [2022-12-14 05:11:52,245 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 05:11:52,246 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 05:11:52,246 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 05:11:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221635 states. [2022-12-14 05:11:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221635 to 219713. [2022-12-14 05:11:59,883 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 05:12:00,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219713 states to 219713 states and 313071 transitions. [2022-12-14 05:12:00,493 INFO L78 Accepts]: Start accepts. Automaton has 219713 states and 313071 transitions. Word has length 156 [2022-12-14 05:12:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:12:00,493 INFO L495 AbstractCegarLoop]: Abstraction has 219713 states and 313071 transitions. [2022-12-14 05:12:00,493 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 05:12:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 219713 states and 313071 transitions. [2022-12-14 05:12:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 05:12:00,946 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:12:00,946 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 05:12:00,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 05:12:01,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 05:12:01,148 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:12:01,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:12:01,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1819745992, now seen corresponding path program 1 times [2022-12-14 05:12:01,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:12:01,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135090392] [2022-12-14 05:12:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:12:01,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:12:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:12:01,337 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 05:12:01,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:12:01,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135090392] [2022-12-14 05:12:01,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135090392] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:12:01,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265352416] [2022-12-14 05:12:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:12:01,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:12:01,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:12:01,339 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:12:01,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:12:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:12:01,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:12:01,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:12:01,514 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 05:12:01,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:12:01,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265352416] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:12:01,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:12:01,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:12:01,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287227085] [2022-12-14 05:12:01,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:12:01,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:12:01,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:12:01,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:12:01,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:12:01,516 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 05:12:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:12:12,836 INFO L93 Difference]: Finished difference Result 528049 states and 766304 transitions. [2022-12-14 05:12:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:12:12,837 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 05:12:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:12:13,730 INFO L225 Difference]: With dead ends: 528049 [2022-12-14 05:12:13,731 INFO L226 Difference]: Without dead ends: 309983 [2022-12-14 05:12:13,980 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 05:12:13,980 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, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:12:13,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 6456 Invalid, 497 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:12:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309983 states. [2022-12-14 05:12:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309983 to 255425. [2022-12-14 05:12:23,833 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 05:12:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255425 states to 255425 states and 369711 transitions. [2022-12-14 05:12:24,531 INFO L78 Accepts]: Start accepts. Automaton has 255425 states and 369711 transitions. Word has length 158 [2022-12-14 05:12:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:12:24,531 INFO L495 AbstractCegarLoop]: Abstraction has 255425 states and 369711 transitions. [2022-12-14 05:12:24,531 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 05:12:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 255425 states and 369711 transitions. [2022-12-14 05:12:25,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 05:12:25,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:12:25,035 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 05:12:25,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 05:12:25,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:12:25,237 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:12:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:12:25,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1682877669, now seen corresponding path program 1 times [2022-12-14 05:12:25,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:12:25,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034554228] [2022-12-14 05:12:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:12:25,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:12:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:12:25,410 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 05:12:25,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:12:25,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034554228] [2022-12-14 05:12:25,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034554228] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:12:25,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390466737] [2022-12-14 05:12:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:12:25,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:12:25,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:12:25,412 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:12:25,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 05:12:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:12:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:12:25,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:12:25,593 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 05:12:25,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:12:25,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390466737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:12:25,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:12:25,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 05:12:25,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056689600] [2022-12-14 05:12:25,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:12:25,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:12:25,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:12:25,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:12:25,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:12:25,595 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 05:12:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:12:41,384 INFO L93 Difference]: Finished difference Result 629449 states and 909157 transitions. [2022-12-14 05:12:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:12:41,384 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 05:12:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:12:42,338 INFO L225 Difference]: With dead ends: 629449 [2022-12-14 05:12:42,338 INFO L226 Difference]: Without dead ends: 375671 [2022-12-14 05:12:42,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 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 05:12:42,645 INFO L413 NwaCegarLoop]: 3215 mSDtfsCounter, 3780 mSDsluCounter, 6400 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:12:42,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3796 Valid, 9615 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:12:43,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375671 states. [2022-12-14 05:12:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375671 to 375653. [2022-12-14 05:12:59,940 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 05:13:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375653 states to 375653 states and 538099 transitions. [2022-12-14 05:13:00,970 INFO L78 Accepts]: Start accepts. Automaton has 375653 states and 538099 transitions. Word has length 159 [2022-12-14 05:13:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:00,970 INFO L495 AbstractCegarLoop]: Abstraction has 375653 states and 538099 transitions. [2022-12-14 05:13:00,970 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 05:13:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 375653 states and 538099 transitions. [2022-12-14 05:13:01,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 05:13:01,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:01,695 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 05:13:01,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 05:13:01,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:01,897 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:01,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:01,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1292419203, now seen corresponding path program 1 times [2022-12-14 05:13:01,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:01,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667794337] [2022-12-14 05:13:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:01,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:02,046 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 05:13:02,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:02,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667794337] [2022-12-14 05:13:02,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667794337] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:13:02,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267414088] [2022-12-14 05:13:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:02,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:02,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:13:02,048 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:13:02,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 05:13:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:02,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:13:02,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:13:02,363 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 05:13:02,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:13:02,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267414088] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:02,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:13:02,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 05:13:02,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025033221] [2022-12-14 05:13:02,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:02,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:13:02,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:02,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:13:02,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:13:02,365 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 05:13:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:29,971 INFO L93 Difference]: Finished difference Result 924965 states and 1321561 transitions. [2022-12-14 05:13:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:13:29,972 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 05:13:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:31,634 INFO L225 Difference]: With dead ends: 924965 [2022-12-14 05:13:31,635 INFO L226 Difference]: Without dead ends: 550959 [2022-12-14 05:13:32,213 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 05:13:32,213 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 05:13:32,214 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 05:13:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550959 states. [2022-12-14 05:13:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550959 to 550925. [2022-12-14 05:13:58,484 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 05:14:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550925 states to 550925 states and 779795 transitions. [2022-12-14 05:14:00,289 INFO L78 Accepts]: Start accepts. Automaton has 550925 states and 779795 transitions. Word has length 161 [2022-12-14 05:14:00,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:14:00,289 INFO L495 AbstractCegarLoop]: Abstraction has 550925 states and 779795 transitions. [2022-12-14 05:14:00,289 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 05:14:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 550925 states and 779795 transitions. [2022-12-14 05:14:01,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 05:14:01,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:14:01,396 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 05:14:01,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 05:14:01,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-14 05:14:01,597 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:14:01,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:14:01,597 INFO L85 PathProgramCache]: Analyzing trace with hash 86093167, now seen corresponding path program 1 times [2022-12-14 05:14:01,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:14:01,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136054338] [2022-12-14 05:14:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:01,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:14:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:01,715 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 05:14:01,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:14:01,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136054338] [2022-12-14 05:14:01,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136054338] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:14:01,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541087626] [2022-12-14 05:14:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:01,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:14:01,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:14:01,717 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:14:01,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:14:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:01,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:14:01,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:14:01,858 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 05:14:01,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:14:01,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541087626] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:14:01,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:14:01,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 05:14:01,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512886654] [2022-12-14 05:14:01,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:14:01,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:14:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:14:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:14:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:14:01,860 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 05:14:35,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:14:35,376 INFO L93 Difference]: Finished difference Result 1062997 states and 1517941 transitions. [2022-12-14 05:14:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:14:35,377 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 05:14:35,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:14:37,405 INFO L225 Difference]: With dead ends: 1062997 [2022-12-14 05:14:37,405 INFO L226 Difference]: Without dead ends: 697355 [2022-12-14 05:14:38,064 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 05:14:38,065 INFO L413 NwaCegarLoop]: 3321 mSDtfsCounter, 111 mSDsluCounter, 3223 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:14:38,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 6544 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:14:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697355 states. [2022-12-14 05:15:08,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697355 to 644237. [2022-12-14 05:15:08,728 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 05:15:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644237 states to 644237 states and 922643 transitions. [2022-12-14 05:15:10,581 INFO L78 Accepts]: Start accepts. Automaton has 644237 states and 922643 transitions. Word has length 158 [2022-12-14 05:15:10,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:15:10,582 INFO L495 AbstractCegarLoop]: Abstraction has 644237 states and 922643 transitions. [2022-12-14 05:15:10,582 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 05:15:10,582 INFO L276 IsEmpty]: Start isEmpty. Operand 644237 states and 922643 transitions. [2022-12-14 05:15:11,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 05:15:11,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:15:11,564 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 05:15:11,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 05:15:11,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:15:11,767 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:15:11,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:15:11,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1238749549, now seen corresponding path program 1 times [2022-12-14 05:15:11,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:15:11,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042203425] [2022-12-14 05:15:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:11,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:15:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:12,125 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 05:15:12,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:15:12,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042203425] [2022-12-14 05:15:12,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042203425] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:15:12,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470742090] [2022-12-14 05:15:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:12,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:15:12,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:15:12,127 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:15:12,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 05:15:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:12,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:15:12,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:15:12,321 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 05:15:12,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:15:12,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470742090] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:15:12,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:15:12,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 05:15:12,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519914623] [2022-12-14 05:15:12,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:15:12,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:15:12,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:15:12,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:15:12,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:15:12,323 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 05:15:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:15:51,320 INFO L93 Difference]: Finished difference Result 1342669 states and 1891833 transitions. [2022-12-14 05:15:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:15:51,320 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 05:15:51,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:15:53,481 INFO L225 Difference]: With dead ends: 1342669 [2022-12-14 05:15:53,482 INFO L226 Difference]: Without dead ends: 700079 [2022-12-14 05:15:54,243 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 05:15:54,244 INFO L413 NwaCegarLoop]: 3218 mSDtfsCounter, 3782 mSDsluCounter, 6415 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:15:54,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3798 Valid, 9633 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:15:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700079 states. [2022-12-14 05:16:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700079 to 700013. [2022-12-14 05:16:32,022 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 05:16:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700013 states to 700013 states and 965491 transitions. [2022-12-14 05:16:34,163 INFO L78 Accepts]: Start accepts. Automaton has 700013 states and 965491 transitions. Word has length 159 [2022-12-14 05:16:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:16:34,164 INFO L495 AbstractCegarLoop]: Abstraction has 700013 states and 965491 transitions. [2022-12-14 05:16:34,164 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 05:16:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 700013 states and 965491 transitions. [2022-12-14 05:16:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-12-14 05:16:35,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:16:35,398 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 05:16:35,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 05:16:35,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:16:35,600 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:16:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:16:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1592808418, now seen corresponding path program 1 times [2022-12-14 05:16:35,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:16:35,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719407555] [2022-12-14 05:16:35,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:35,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:16:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:35,759 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 05:16:35,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:16:35,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719407555] [2022-12-14 05:16:35,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719407555] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:16:35,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765748885] [2022-12-14 05:16:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:35,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:16:35,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:16:35,761 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:16:35,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 05:16:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:35,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:16:35,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:16:35,923 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 05:16:35,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:16:35,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765748885] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:16:35,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:16:35,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 05:16:35,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942866705] [2022-12-14 05:16:35,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:16:35,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:16:35,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:16:35,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:16:35,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:16:35,925 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 05:17:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:17:12,577 INFO L93 Difference]: Finished difference Result 988688 states and 1358832 transitions. [2022-12-14 05:17:12,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:17:12,578 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 05:17:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:17:14,767 INFO L225 Difference]: With dead ends: 988688 [2022-12-14 05:17:14,767 INFO L226 Difference]: Without dead ends: 748902 [2022-12-14 05:17:15,195 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 05:17:15,196 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, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:17:15,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 6741 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:17:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748902 states. [2022-12-14 05:17:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748902 to 724685. [2022-12-14 05:17:53,822 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 05:17:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724685 states to 724685 states and 996311 transitions. [2022-12-14 05:17:56,284 INFO L78 Accepts]: Start accepts. Automaton has 724685 states and 996311 transitions. Word has length 160 [2022-12-14 05:17:56,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:17:56,285 INFO L495 AbstractCegarLoop]: Abstraction has 724685 states and 996311 transitions. [2022-12-14 05:17:56,285 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 05:17:56,285 INFO L276 IsEmpty]: Start isEmpty. Operand 724685 states and 996311 transitions. [2022-12-14 05:17:57,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 05:17:57,508 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:17:57,508 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 05:17:57,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 05:17:57,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:17:57,710 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:17:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:17:57,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1283770519, now seen corresponding path program 1 times [2022-12-14 05:17:57,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:17:57,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327319271] [2022-12-14 05:17:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:17:57,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:17:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:17:57,879 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 05:17:57,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:17:57,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327319271] [2022-12-14 05:17:57,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327319271] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:17:57,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950101702] [2022-12-14 05:17:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:17:57,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:17:57,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:17:57,880 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:17:57,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17da19d0-98d2-4191-a33e-2201f8aabcad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 05:17:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:17:57,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:17:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:17:58,003 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 05:17:58,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:17:58,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950101702] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:17:58,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:17:58,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:17:58,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52472079] [2022-12-14 05:17:58,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:17:58,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:17:58,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:17:58,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:17:58,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:17:58,004 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)