./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/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_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/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_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/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 d09ea01cef1d93b0c86c8a3dadfd601718ca81915e873154848504beefeee43f --- 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 04:51:29,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:51:29,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:51:29,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:51:29,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:51:29,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:51:29,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:51:29,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:51:29,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:51:29,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:51:29,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:51:29,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:51:29,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:51:29,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:51:29,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:51:29,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:51:29,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:51:29,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:51:29,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:51:29,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:51:29,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:51:29,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:51:29,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:51:29,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:51:29,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:51:29,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:51:29,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:51:29,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:51:29,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:51:29,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:51:29,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:51:29,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:51:29,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:51:29,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:51:29,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:51:29,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:51:29,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:51:29,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:51:29,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:51:29,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:51:29,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:51:29,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 04:51:29,092 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:51:29,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:51:29,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:51:29,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:51:29,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:51:29,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:51:29,094 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:51:29,094 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:51:29,094 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:51:29,094 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:51:29,094 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:51:29,094 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:51:29,095 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:51:29,095 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:51:29,095 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:51:29,095 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:51:29,095 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:51:29,096 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:51:29,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:51:29,097 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 04:51:29,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:51:29,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 04:51:29,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:51:29,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 04:51:29,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:51:29,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 04:51:29,098 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 04:51:29,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 04:51:29,098 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:51:29,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 04:51:29,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:51:29,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:51:29,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:51:29,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:51:29,099 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:51:29,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:51:29,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 04:51:29,100 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:51:29,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:51:29,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 04:51:29,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:51:29,100 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_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d09ea01cef1d93b0c86c8a3dadfd601718ca81915e873154848504beefeee43f [2022-12-14 04:51:29,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:51:29,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:51:29,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:51:29,320 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:51:29,320 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:51:29,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 04:51:31,837 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:51:32,057 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:51:32,057 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 04:51:32,067 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/data/0478e98b8/7bafb31bbbcd454e9e906be8f4d1af4e/FLAG9462c847a [2022-12-14 04:51:32,396 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/data/0478e98b8/7bafb31bbbcd454e9e906be8f4d1af4e [2022-12-14 04:51:32,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:51:32,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:51:32,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:51:32,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:51:32,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:51:32,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b37b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32, skipping insertion in model container [2022-12-14 04:51:32,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:51:32,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:51:32,670 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_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[11680,11693] [2022-12-14 04:51:32,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:51:32,733 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:51:32,793 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_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[11680,11693] [2022-12-14 04:51:32,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:51:32,839 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:51:32,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32 WrapperNode [2022-12-14 04:51:32,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:51:32,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:51:32,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:51:32,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:51:32,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,892 INFO L138 Inliner]: procedures = 28, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 949 [2022-12-14 04:51:32,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:51:32,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:51:32,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:51:32,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:51:32,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,928 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:51:32,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:51:32,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:51:32,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:51:32,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32" (1/1) ... [2022-12-14 04:51:32,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:51:32,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:51:32,967 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:51:32,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:51:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:51:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 04:51:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:51:32,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:51:33,107 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:51:33,108 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:51:33,638 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:51:33,755 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:51:33,755 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 04:51:33,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:51:33 BoogieIcfgContainer [2022-12-14 04:51:33,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:51:33,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:51:33,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:51:33,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:51:33,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:51:32" (1/3) ... [2022-12-14 04:51:33,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271b7b19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:51:33, skipping insertion in model container [2022-12-14 04:51:33,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:32" (2/3) ... [2022-12-14 04:51:33,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271b7b19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:51:33, skipping insertion in model container [2022-12-14 04:51:33,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:51:33" (3/3) ... [2022-12-14 04:51:33,763 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 04:51:33,777 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:51:33,777 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 04:51:33,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:51:33,819 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;@478d00c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:51:33,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 04:51:33,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 164 states have (on average 1.7865853658536586) internal successors, (293), 166 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 04:51:33,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:51:33,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:51:33,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:51:33,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:51:33,834 INFO L85 PathProgramCache]: Analyzing trace with hash 399396157, now seen corresponding path program 1 times [2022-12-14 04:51:33,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:51:33,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296327039] [2022-12-14 04:51:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:33,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:51:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:51:34,264 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 04:51:34,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:51:34,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296327039] [2022-12-14 04:51:34,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296327039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:51:34,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:51:34,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:51:34,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252418829] [2022-12-14 04:51:34,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:51:34,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:51:34,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:51:34,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:51:34,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:51:34,296 INFO L87 Difference]: Start difference. First operand has 167 states, 164 states have (on average 1.7865853658536586) internal successors, (293), 166 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:51:34,532 INFO L93 Difference]: Finished difference Result 256 states and 429 transitions. [2022-12-14 04:51:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:51:34,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-12-14 04:51:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:51:34,540 INFO L225 Difference]: With dead ends: 256 [2022-12-14 04:51:34,540 INFO L226 Difference]: Without dead ends: 164 [2022-12-14 04:51:34,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:51:34,545 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 716 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:51:34,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 247 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:51:34,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-14 04:51:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-12-14 04:51:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2085889570552146) internal successors, (197), 163 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 197 transitions. [2022-12-14 04:51:34,588 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 197 transitions. Word has length 107 [2022-12-14 04:51:34,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:51:34,589 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 197 transitions. [2022-12-14 04:51:34,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 197 transitions. [2022-12-14 04:51:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 04:51:34,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:51:34,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:51:34,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 04:51:34,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:51:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:51:34,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1479537915, now seen corresponding path program 1 times [2022-12-14 04:51:34,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:51:34,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219679893] [2022-12-14 04:51:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:34,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:51:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:51:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:51:34,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:51:34,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219679893] [2022-12-14 04:51:34,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219679893] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:51:34,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:51:34,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:51:34,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810342805] [2022-12-14 04:51:34,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:51:34,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:51:34,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:51:34,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:51:34,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:51:34,830 INFO L87 Difference]: Start difference. First operand 164 states and 197 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:51:34,981 INFO L93 Difference]: Finished difference Result 254 states and 317 transitions. [2022-12-14 04:51:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:51:34,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-12-14 04:51:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:51:34,983 INFO L225 Difference]: With dead ends: 254 [2022-12-14 04:51:34,983 INFO L226 Difference]: Without dead ends: 164 [2022-12-14 04:51:34,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:51:34,985 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 491 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:51:34,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 120 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:51:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-14 04:51:35,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-12-14 04:51:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.196319018404908) internal successors, (195), 163 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 195 transitions. [2022-12-14 04:51:35,004 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 195 transitions. Word has length 108 [2022-12-14 04:51:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:51:35,004 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 195 transitions. [2022-12-14 04:51:35,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:35,004 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 195 transitions. [2022-12-14 04:51:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 04:51:35,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:51:35,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:51:35,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 04:51:35,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:51:35,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:51:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash 689099325, now seen corresponding path program 1 times [2022-12-14 04:51:35,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:51:35,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589012254] [2022-12-14 04:51:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:35,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:51:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:51:35,191 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 04:51:35,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:51:35,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589012254] [2022-12-14 04:51:35,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589012254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:51:35,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:51:35,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:51:35,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324250271] [2022-12-14 04:51:35,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:51:35,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:51:35,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:51:35,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:51:35,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:51:35,194 INFO L87 Difference]: Start difference. First operand 164 states and 195 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:51:35,315 INFO L93 Difference]: Finished difference Result 250 states and 309 transitions. [2022-12-14 04:51:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:51:35,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-12-14 04:51:35,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:51:35,317 INFO L225 Difference]: With dead ends: 250 [2022-12-14 04:51:35,317 INFO L226 Difference]: Without dead ends: 164 [2022-12-14 04:51:35,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:51:35,318 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 473 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:51:35,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 128 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:51:35,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-14 04:51:35,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-12-14 04:51:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1840490797546013) internal successors, (193), 163 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2022-12-14 04:51:35,329 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 109 [2022-12-14 04:51:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:51:35,329 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2022-12-14 04:51:35,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:35,329 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2022-12-14 04:51:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 04:51:35,330 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:51:35,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:51:35,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 04:51:35,331 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:51:35,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:51:35,331 INFO L85 PathProgramCache]: Analyzing trace with hash -17731463, now seen corresponding path program 1 times [2022-12-14 04:51:35,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:51:35,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800452269] [2022-12-14 04:51:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:35,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:51:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:51:35,460 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 04:51:35,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:51:35,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800452269] [2022-12-14 04:51:35,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800452269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:51:35,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:51:35,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:51:35,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571387767] [2022-12-14 04:51:35,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:51:35,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:51:35,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:51:35,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:51:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:51:35,463 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:51:35,584 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2022-12-14 04:51:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:51:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-12-14 04:51:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:51:35,585 INFO L225 Difference]: With dead ends: 258 [2022-12-14 04:51:35,585 INFO L226 Difference]: Without dead ends: 164 [2022-12-14 04:51:35,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:51:35,586 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 490 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:51:35,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 112 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:51:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-14 04:51:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-12-14 04:51:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1717791411042944) internal successors, (191), 163 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 191 transitions. [2022-12-14 04:51:35,598 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 191 transitions. Word has length 110 [2022-12-14 04:51:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:51:35,598 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 191 transitions. [2022-12-14 04:51:35,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 191 transitions. [2022-12-14 04:51:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 04:51:35,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:51:35,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:51:35,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 04:51:35,600 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:51:35,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:51:35,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2065751845, now seen corresponding path program 1 times [2022-12-14 04:51:35,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:51:35,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802245346] [2022-12-14 04:51:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:35,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:51:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:51:35,714 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 04:51:35,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:51:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802245346] [2022-12-14 04:51:35,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802245346] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:51:35,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:51:35,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:51:35,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118101393] [2022-12-14 04:51:35,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:51:35,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:51:35,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:51:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:51:35,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:51:35,717 INFO L87 Difference]: Start difference. First operand 164 states and 191 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:35,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:51:35,852 INFO L93 Difference]: Finished difference Result 262 states and 315 transitions. [2022-12-14 04:51:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:51:35,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-12-14 04:51:35,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:51:35,853 INFO L225 Difference]: With dead ends: 262 [2022-12-14 04:51:35,853 INFO L226 Difference]: Without dead ends: 164 [2022-12-14 04:51:35,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:51:35,854 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 414 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:51:35,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 138 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:51:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-14 04:51:35,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-12-14 04:51:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.165644171779141) internal successors, (190), 163 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2022-12-14 04:51:35,864 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 111 [2022-12-14 04:51:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:51:35,864 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2022-12-14 04:51:35,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2022-12-14 04:51:35,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 04:51:35,865 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:51:35,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:51:35,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 04:51:35,866 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:51:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:51:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash -231784211, now seen corresponding path program 1 times [2022-12-14 04:51:35,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:51:35,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802608593] [2022-12-14 04:51:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:35,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:51:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:51:35,973 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 04:51:35,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:51:35,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802608593] [2022-12-14 04:51:35,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802608593] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:51:35,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:51:35,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:51:35,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421467826] [2022-12-14 04:51:35,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:51:35,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:51:35,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:51:35,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:51:35,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:51:35,976 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:51:36,111 INFO L93 Difference]: Finished difference Result 238 states and 288 transitions. [2022-12-14 04:51:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:51:36,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-12-14 04:51:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:51:36,112 INFO L225 Difference]: With dead ends: 238 [2022-12-14 04:51:36,112 INFO L226 Difference]: Without dead ends: 164 [2022-12-14 04:51:36,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:51:36,113 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 421 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:51:36,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 152 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:51:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-14 04:51:36,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-12-14 04:51:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1533742331288344) internal successors, (188), 163 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2022-12-14 04:51:36,129 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 112 [2022-12-14 04:51:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:51:36,129 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2022-12-14 04:51:36,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2022-12-14 04:51:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 04:51:36,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:51:36,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:51:36,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 04:51:36,131 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:51:36,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:51:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1640679083, now seen corresponding path program 1 times [2022-12-14 04:51:36,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:51:36,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392702202] [2022-12-14 04:51:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:36,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:51:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:51:36,256 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 04:51:36,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:51:36,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392702202] [2022-12-14 04:51:36,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392702202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:51:36,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:51:36,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:51:36,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774797992] [2022-12-14 04:51:36,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:51:36,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:51:36,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:51:36,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:51:36,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:51:36,258 INFO L87 Difference]: Start difference. First operand 164 states and 188 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:36,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:51:36,375 INFO L93 Difference]: Finished difference Result 242 states and 289 transitions. [2022-12-14 04:51:36,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:51:36,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-12-14 04:51:36,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:51:36,376 INFO L225 Difference]: With dead ends: 242 [2022-12-14 04:51:36,376 INFO L226 Difference]: Without dead ends: 164 [2022-12-14 04:51:36,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:51:36,377 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 426 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:51:36,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 144 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:51:36,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-14 04:51:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-12-14 04:51:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1411042944785277) internal successors, (186), 163 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2022-12-14 04:51:36,389 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 113 [2022-12-14 04:51:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:51:36,389 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2022-12-14 04:51:36,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2022-12-14 04:51:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 04:51:36,390 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:51:36,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:51:36,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 04:51:36,390 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:51:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:51:36,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1030439009, now seen corresponding path program 1 times [2022-12-14 04:51:36,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:51:36,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139087365] [2022-12-14 04:51:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:36,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:51:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:51:36,556 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 04:51:36,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:51:36,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139087365] [2022-12-14 04:51:36,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139087365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:51:36,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:51:36,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:51:36,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290851692] [2022-12-14 04:51:36,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:51:36,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:51:36,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:51:36,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:51:36,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:51:36,558 INFO L87 Difference]: Start difference. First operand 164 states and 186 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:51:36,660 INFO L93 Difference]: Finished difference Result 234 states and 277 transitions. [2022-12-14 04:51:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:51:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-12-14 04:51:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:51:36,661 INFO L225 Difference]: With dead ends: 234 [2022-12-14 04:51:36,661 INFO L226 Difference]: Without dead ends: 164 [2022-12-14 04:51:36,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:51:36,662 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 397 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:51:36,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 160 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:51:36,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-14 04:51:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-12-14 04:51:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1288343558282208) internal successors, (184), 163 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2022-12-14 04:51:36,674 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 114 [2022-12-14 04:51:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:51:36,675 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2022-12-14 04:51:36,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:51:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2022-12-14 04:51:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 04:51:36,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:51:36,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:51:36,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 04:51:36,676 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:51:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:51:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1691073389, now seen corresponding path program 1 times [2022-12-14 04:51:36,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:51:36,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837853451] [2022-12-14 04:51:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:36,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:51:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:51:56,276 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 04:51:56,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:51:56,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837853451] [2022-12-14 04:51:56,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837853451] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:51:56,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:51:56,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-12-14 04:51:56,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996653311] [2022-12-14 04:51:56,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:51:56,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 04:51:56,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:51:56,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 04:51:56,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2972, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 04:51:56,279 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:52:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:52:23,216 INFO L93 Difference]: Finished difference Result 280 states and 340 transitions. [2022-12-14 04:52:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 04:52:23,217 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-12-14 04:52:23,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:52:23,219 INFO L225 Difference]: With dead ends: 280 [2022-12-14 04:52:23,219 INFO L226 Difference]: Without dead ends: 224 [2022-12-14 04:52:23,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=2235, Invalid=7665, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 04:52:23,224 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 1609 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 3711 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 3718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 04:52:23,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1609 Valid, 1716 Invalid, 3718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 3711 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 04:52:23,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-12-14 04:52:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2022-12-14 04:52:23,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.1851851851851851) internal successors, (256), 216 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:52:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 256 transitions. [2022-12-14 04:52:23,274 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 256 transitions. Word has length 115 [2022-12-14 04:52:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:52:23,275 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 256 transitions. [2022-12-14 04:52:23,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:52:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 256 transitions. [2022-12-14 04:52:23,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 04:52:23,276 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:52:23,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:52:23,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 04:52:23,277 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:52:23,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:52:23,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1785184760, now seen corresponding path program 1 times [2022-12-14 04:52:23,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:52:23,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907742800] [2022-12-14 04:52:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:52:23,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:52:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:52:43,791 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 04:52:43,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:52:43,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907742800] [2022-12-14 04:52:43,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907742800] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:52:43,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:52:43,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-12-14 04:52:43,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146785008] [2022-12-14 04:52:43,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:52:43,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 04:52:43,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:52:43,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 04:52:43,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=3173, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 04:52:43,795 INFO L87 Difference]: Start difference. First operand 217 states and 256 transitions. Second operand has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:17,959 INFO L93 Difference]: Finished difference Result 385 states and 482 transitions. [2022-12-14 04:53:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-14 04:53:17,960 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-12-14 04:53:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:17,961 INFO L225 Difference]: With dead ends: 385 [2022-12-14 04:53:17,961 INFO L226 Difference]: Without dead ends: 278 [2022-12-14 04:53:17,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=2569, Invalid=8351, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 04:53:17,963 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 1950 mSDsluCounter, 2019 mSDsCounter, 0 mSdLazyCounter, 4655 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1950 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 4660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 4655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:17,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1950 Valid, 2156 Invalid, 4660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 4655 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-12-14 04:53:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-12-14 04:53:18,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 271. [2022-12-14 04:53:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.2185185185185186) internal successors, (329), 270 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 329 transitions. [2022-12-14 04:53:18,002 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 329 transitions. Word has length 117 [2022-12-14 04:53:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:18,002 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 329 transitions. [2022-12-14 04:53:18,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 329 transitions. [2022-12-14 04:53:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 04:53:18,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:18,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:18,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 04:53:18,003 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:18,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1504881241, now seen corresponding path program 1 times [2022-12-14 04:53:18,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:18,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368596980] [2022-12-14 04:53:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:18,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:18,044 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 04:53:18,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:18,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368596980] [2022-12-14 04:53:18,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368596980] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:18,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:18,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:53:18,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344339879] [2022-12-14 04:53:18,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:18,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:53:18,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:53:18,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:53:18,046 INFO L87 Difference]: Start difference. First operand 271 states and 329 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:18,126 INFO L93 Difference]: Finished difference Result 433 states and 548 transitions. [2022-12-14 04:53:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:53:18,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-12-14 04:53:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:18,127 INFO L225 Difference]: With dead ends: 433 [2022-12-14 04:53:18,128 INFO L226 Difference]: Without dead ends: 270 [2022-12-14 04:53:18,128 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 04:53:18,128 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 0 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:18,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 330 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-12-14 04:53:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2022-12-14 04:53:18,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.211895910780669) internal successors, (326), 269 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 326 transitions. [2022-12-14 04:53:18,167 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 326 transitions. Word has length 117 [2022-12-14 04:53:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:18,168 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 326 transitions. [2022-12-14 04:53:18,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 326 transitions. [2022-12-14 04:53:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 04:53:18,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:18,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:18,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 04:53:18,168 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash -495756402, now seen corresponding path program 1 times [2022-12-14 04:53:18,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:18,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134371646] [2022-12-14 04:53:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:18,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:18,334 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 04:53:18,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:18,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134371646] [2022-12-14 04:53:18,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134371646] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:18,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:18,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 04:53:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485507522] [2022-12-14 04:53:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:18,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:53:18,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:53:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:53:18,336 INFO L87 Difference]: Start difference. First operand 270 states and 326 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:18,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:18,490 INFO L93 Difference]: Finished difference Result 330 states and 402 transitions. [2022-12-14 04:53:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 04:53:18,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2022-12-14 04:53:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:18,491 INFO L225 Difference]: With dead ends: 330 [2022-12-14 04:53:18,492 INFO L226 Difference]: Without dead ends: 328 [2022-12-14 04:53:18,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:53:18,492 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 138 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:18,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 680 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:53:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-12-14 04:53:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 270. [2022-12-14 04:53:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.20817843866171) internal successors, (325), 269 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 325 transitions. [2022-12-14 04:53:18,539 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 325 transitions. Word has length 118 [2022-12-14 04:53:18,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:18,539 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 325 transitions. [2022-12-14 04:53:18,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 325 transitions. [2022-12-14 04:53:18,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 04:53:18,539 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:18,540 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:18,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 04:53:18,540 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:18,540 INFO L85 PathProgramCache]: Analyzing trace with hash -456798253, now seen corresponding path program 1 times [2022-12-14 04:53:18,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:18,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550066315] [2022-12-14 04:53:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:18,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:53:18,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:18,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550066315] [2022-12-14 04:53:18,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550066315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:18,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:18,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:53:18,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974103118] [2022-12-14 04:53:18,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:18,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:53:18,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:18,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:53:18,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:53:18,677 INFO L87 Difference]: Start difference. First operand 270 states and 325 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:18,823 INFO L93 Difference]: Finished difference Result 508 states and 644 transitions. [2022-12-14 04:53:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:53:18,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-12-14 04:53:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:18,826 INFO L225 Difference]: With dead ends: 508 [2022-12-14 04:53:18,826 INFO L226 Difference]: Without dead ends: 348 [2022-12-14 04:53:18,827 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 04:53:18,827 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 64 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:18,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 373 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:18,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-12-14 04:53:18,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 334. [2022-12-14 04:53:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.2252252252252251) internal successors, (408), 333 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 408 transitions. [2022-12-14 04:53:18,896 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 408 transitions. Word has length 137 [2022-12-14 04:53:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:18,897 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 408 transitions. [2022-12-14 04:53:18,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 408 transitions. [2022-12-14 04:53:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 04:53:18,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:18,897 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 04:53:18,898 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash -703489721, now seen corresponding path program 1 times [2022-12-14 04:53:18,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:18,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438904526] [2022-12-14 04:53:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:18,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:53:18,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:18,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438904526] [2022-12-14 04:53:18,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438904526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:18,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:18,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:53:18,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950746789] [2022-12-14 04:53:18,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:18,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:53:18,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:18,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:53:18,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:53:18,991 INFO L87 Difference]: Start difference. First operand 334 states and 408 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:19,114 INFO L93 Difference]: Finished difference Result 688 states and 882 transitions. [2022-12-14 04:53:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:53:19,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-12-14 04:53:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:19,115 INFO L225 Difference]: With dead ends: 688 [2022-12-14 04:53:19,115 INFO L226 Difference]: Without dead ends: 472 [2022-12-14 04:53:19,116 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 04:53:19,116 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 59 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:19,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 367 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-12-14 04:53:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454. [2022-12-14 04:53:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.2560706401766004) internal successors, (569), 453 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 569 transitions. [2022-12-14 04:53:19,207 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 569 transitions. Word has length 140 [2022-12-14 04:53:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:19,208 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 569 transitions. [2022-12-14 04:53:19,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:19,208 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 569 transitions. [2022-12-14 04:53:19,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 04:53:19,208 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:19,208 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:19,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 04:53:19,209 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:19,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:19,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1855362040, now seen corresponding path program 1 times [2022-12-14 04:53:19,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:19,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731784191] [2022-12-14 04:53:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:19,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:53:19,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:19,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731784191] [2022-12-14 04:53:19,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731784191] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:19,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:19,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:53:19,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23876447] [2022-12-14 04:53:19,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:19,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:53:19,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:19,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:53:19,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:53:19,306 INFO L87 Difference]: Start difference. First operand 454 states and 569 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:19,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:19,503 INFO L93 Difference]: Finished difference Result 1060 states and 1381 transitions. [2022-12-14 04:53:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:53:19,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-12-14 04:53:19,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:19,508 INFO L225 Difference]: With dead ends: 1060 [2022-12-14 04:53:19,508 INFO L226 Difference]: Without dead ends: 724 [2022-12-14 04:53:19,509 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 04:53:19,509 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 54 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:19,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 360 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-12-14 04:53:19,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 698. [2022-12-14 04:53:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 1.284074605451937) internal successors, (895), 697 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 895 transitions. [2022-12-14 04:53:19,619 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 895 transitions. Word has length 143 [2022-12-14 04:53:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:19,619 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 895 transitions. [2022-12-14 04:53:19,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 895 transitions. [2022-12-14 04:53:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 04:53:19,620 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:19,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:19,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 04:53:19,620 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:19,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:19,620 INFO L85 PathProgramCache]: Analyzing trace with hash 941260284, now seen corresponding path program 1 times [2022-12-14 04:53:19,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:19,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527652819] [2022-12-14 04:53:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:19,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:53:19,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527652819] [2022-12-14 04:53:19,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527652819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:19,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:19,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:53:19,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176438887] [2022-12-14 04:53:19,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:19,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:53:19,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:19,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:53:19,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:53:19,721 INFO L87 Difference]: Start difference. First operand 698 states and 895 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:19,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:19,979 INFO L93 Difference]: Finished difference Result 1804 states and 2375 transitions. [2022-12-14 04:53:19,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:53:19,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2022-12-14 04:53:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:19,982 INFO L225 Difference]: With dead ends: 1804 [2022-12-14 04:53:19,982 INFO L226 Difference]: Without dead ends: 1224 [2022-12-14 04:53:19,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:53:19,983 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 49 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:19,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 353 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:19,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2022-12-14 04:53:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1182. [2022-12-14 04:53:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 1.3031329381879764) internal successors, (1539), 1181 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1539 transitions. [2022-12-14 04:53:20,153 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1539 transitions. Word has length 146 [2022-12-14 04:53:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:20,153 INFO L495 AbstractCegarLoop]: Abstraction has 1182 states and 1539 transitions. [2022-12-14 04:53:20,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1539 transitions. [2022-12-14 04:53:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 04:53:20,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:20,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:20,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 04:53:20,154 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:20,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:20,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1290478460, now seen corresponding path program 1 times [2022-12-14 04:53:20,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:20,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140451950] [2022-12-14 04:53:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:20,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:53:20,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:20,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140451950] [2022-12-14 04:53:20,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140451950] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:20,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:20,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:53:20,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831362750] [2022-12-14 04:53:20,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:20,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:53:20,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:20,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:53:20,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:53:20,262 INFO L87 Difference]: Start difference. First operand 1182 states and 1539 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:20,647 INFO L93 Difference]: Finished difference Result 3268 states and 4323 transitions. [2022-12-14 04:53:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:53:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-12-14 04:53:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:20,654 INFO L225 Difference]: With dead ends: 3268 [2022-12-14 04:53:20,654 INFO L226 Difference]: Without dead ends: 2204 [2022-12-14 04:53:20,656 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 04:53:20,657 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 44 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:20,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 346 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:20,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2022-12-14 04:53:21,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2130. [2022-12-14 04:53:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2129 states have (on average 1.3128229215594176) internal successors, (2795), 2129 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2795 transitions. [2022-12-14 04:53:21,073 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2795 transitions. Word has length 149 [2022-12-14 04:53:21,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:21,073 INFO L495 AbstractCegarLoop]: Abstraction has 2130 states and 2795 transitions. [2022-12-14 04:53:21,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:21,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2795 transitions. [2022-12-14 04:53:21,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 04:53:21,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:21,074 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:21,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 04:53:21,074 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:21,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1926445181, now seen corresponding path program 1 times [2022-12-14 04:53:21,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:21,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87379709] [2022-12-14 04:53:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:21,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:53:21,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:21,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87379709] [2022-12-14 04:53:21,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87379709] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:21,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:21,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:53:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116569422] [2022-12-14 04:53:21,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:21,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:53:21,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:53:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:53:21,178 INFO L87 Difference]: Start difference. First operand 2130 states and 2795 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:21,894 INFO L93 Difference]: Finished difference Result 6124 states and 8107 transitions. [2022-12-14 04:53:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:53:21,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-12-14 04:53:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:21,902 INFO L225 Difference]: With dead ends: 6124 [2022-12-14 04:53:21,902 INFO L226 Difference]: Without dead ends: 4112 [2022-12-14 04:53:21,904 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 04:53:21,904 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 39 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:21,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 339 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:53:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4112 states. [2022-12-14 04:53:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4112 to 3974. [2022-12-14 04:53:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 1.3156305059149258) internal successors, (5227), 3973 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 5227 transitions. [2022-12-14 04:53:22,526 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 5227 transitions. Word has length 152 [2022-12-14 04:53:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:22,526 INFO L495 AbstractCegarLoop]: Abstraction has 3974 states and 5227 transitions. [2022-12-14 04:53:22,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 5227 transitions. [2022-12-14 04:53:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 04:53:22,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:22,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:22,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 04:53:22,527 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1563935058, now seen corresponding path program 1 times [2022-12-14 04:53:22,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:22,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622389412] [2022-12-14 04:53:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:22,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:53:22,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:22,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622389412] [2022-12-14 04:53:22,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622389412] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:22,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:22,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:53:22,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300382535] [2022-12-14 04:53:22,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:22,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:53:22,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:22,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:53:22,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:53:22,675 INFO L87 Difference]: Start difference. First operand 3974 states and 5227 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:23,985 INFO L93 Difference]: Finished difference Result 11668 states and 15419 transitions. [2022-12-14 04:53:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:53:23,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-12-14 04:53:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:23,998 INFO L225 Difference]: With dead ends: 11668 [2022-12-14 04:53:23,998 INFO L226 Difference]: Without dead ends: 7812 [2022-12-14 04:53:24,001 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 04:53:24,002 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 34 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:24,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 332 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:24,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7812 states. [2022-12-14 04:53:25,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7812 to 7546. [2022-12-14 04:53:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7546 states, 7545 states have (on average 1.3141153081510935) internal successors, (9915), 7545 states have internal predecessors, (9915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7546 states to 7546 states and 9915 transitions. [2022-12-14 04:53:25,368 INFO L78 Accepts]: Start accepts. Automaton has 7546 states and 9915 transitions. Word has length 155 [2022-12-14 04:53:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:25,369 INFO L495 AbstractCegarLoop]: Abstraction has 7546 states and 9915 transitions. [2022-12-14 04:53:25,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7546 states and 9915 transitions. [2022-12-14 04:53:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 04:53:25,369 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:25,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:25,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 04:53:25,370 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:25,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:25,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1785959033, now seen corresponding path program 1 times [2022-12-14 04:53:25,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:25,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401706201] [2022-12-14 04:53:25,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:25,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:53:25,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:25,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401706201] [2022-12-14 04:53:25,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401706201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:25,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:25,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:53:25,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531175985] [2022-12-14 04:53:25,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:53:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:53:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:53:25,463 INFO L87 Difference]: Start difference. First operand 7546 states and 9915 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:28,034 INFO L93 Difference]: Finished difference Result 22400 states and 29503 transitions. [2022-12-14 04:53:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:53:28,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-12-14 04:53:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:28,065 INFO L225 Difference]: With dead ends: 22400 [2022-12-14 04:53:28,065 INFO L226 Difference]: Without dead ends: 14972 [2022-12-14 04:53:28,072 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 04:53:28,073 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 31 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:28,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 335 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:28,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14972 states. [2022-12-14 04:53:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14972 to 14450. [2022-12-14 04:53:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14450 states, 14449 states have (on average 1.3099176413592637) internal successors, (18927), 14449 states have internal predecessors, (18927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14450 states to 14450 states and 18927 transitions. [2022-12-14 04:53:30,420 INFO L78 Accepts]: Start accepts. Automaton has 14450 states and 18927 transitions. Word has length 158 [2022-12-14 04:53:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:30,420 INFO L495 AbstractCegarLoop]: Abstraction has 14450 states and 18927 transitions. [2022-12-14 04:53:30,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 14450 states and 18927 transitions. [2022-12-14 04:53:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 04:53:30,421 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:30,422 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:30,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 04:53:30,422 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:30,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash 982443534, now seen corresponding path program 1 times [2022-12-14 04:53:30,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:30,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696415535] [2022-12-14 04:53:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:30,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:53:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:53:30,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:53:30,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696415535] [2022-12-14 04:53:30,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696415535] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:53:30,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:53:30,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:53:30,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521256820] [2022-12-14 04:53:30,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:53:30,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:53:30,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:53:30,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:53:30,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:53:30,533 INFO L87 Difference]: Start difference. First operand 14450 states and 18927 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:33,001 INFO L93 Difference]: Finished difference Result 28780 states and 37731 transitions. [2022-12-14 04:53:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:53:33,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2022-12-14 04:53:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:33,023 INFO L225 Difference]: With dead ends: 28780 [2022-12-14 04:53:33,023 INFO L226 Difference]: Without dead ends: 14444 [2022-12-14 04:53:33,033 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 04:53:33,034 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 67 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:33,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 383 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:53:33,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14444 states. [2022-12-14 04:53:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14444 to 12406. [2022-12-14 04:53:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12406 states, 12405 states have (on average 1.2887545344619105) internal successors, (15987), 12405 states have internal predecessors, (15987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12406 states to 12406 states and 15987 transitions. [2022-12-14 04:53:35,432 INFO L78 Accepts]: Start accepts. Automaton has 12406 states and 15987 transitions. Word has length 161 [2022-12-14 04:53:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:35,432 INFO L495 AbstractCegarLoop]: Abstraction has 12406 states and 15987 transitions. [2022-12-14 04:53:35,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:53:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 12406 states and 15987 transitions. [2022-12-14 04:53:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-14 04:53:35,434 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:35,434 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:53:35,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 04:53:35,434 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:53:35,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:35,434 INFO L85 PathProgramCache]: Analyzing trace with hash -269109358, now seen corresponding path program 1 times [2022-12-14 04:53:35,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:53:35,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425373178] [2022-12-14 04:53:35,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:53:35,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:53:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:56:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:56:49,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:56:49,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425373178] [2022-12-14 04:56:49,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425373178] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:56:49,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250079025] [2022-12-14 04:56:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:56:49,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:56:49,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:56:49,095 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:56:49,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ede02b-fec1-4e3d-8b0d-bcc5ef73c12c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 04:56:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:56:49,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 208 conjunts are in the unsatisfiable core [2022-12-14 04:56:49,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:01:48,601 WARN L233 SmtUtils]: Spent 8.95s on a formula simplification. DAG size of input: 199 DAG size of output: 196 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:02:46,161 WARN L233 SmtUtils]: Spent 19.48s on a formula simplification. DAG size of input: 290 DAG size of output: 257 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)