./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/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_a240a2f0-b683-4300-9d38-1dc7cc498d72/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/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_a240a2f0-b683-4300-9d38-1dc7cc498d72/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 9722ff92ac7fe0a04a9fad473fb73ed6306a5571935abb587177743f8c4febdd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:45:41,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:45:41,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:45:42,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:45:42,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:45:42,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:45:42,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:45:42,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:45:42,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:45:42,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:45:42,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:45:42,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:45:42,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:45:42,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:45:42,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:45:42,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:45:42,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:45:42,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:45:42,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:45:42,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:45:42,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:45:42,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:45:42,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:45:42,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:45:42,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:45:42,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:45:42,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:45:42,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:45:42,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:45:42,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:45:42,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:45:42,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:45:42,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:45:42,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:45:42,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:45:42,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:45:42,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:45:42,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:45:42,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:45:42,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:45:42,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:45:42,039 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:45:42,059 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:45:42,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:45:42,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:45:42,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:45:42,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:45:42,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:45:42,061 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:45:42,061 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:45:42,061 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:45:42,061 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:45:42,061 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:45:42,062 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:45:42,062 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:45:42,062 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:45:42,062 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:45:42,062 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:45:42,062 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:45:42,063 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:45:42,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:45:42,063 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:45:42,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:45:42,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:45:42,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:45:42,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:45:42,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:45:42,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:45:42,065 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:45:42,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:45:42,065 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:45:42,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:45:42,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:45:42,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:45:42,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:45:42,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:45:42,066 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:45:42,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:45:42,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:45:42,066 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:45:42,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:45:42,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:45:42,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:45:42,067 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_a240a2f0-b683-4300-9d38-1dc7cc498d72/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9722ff92ac7fe0a04a9fad473fb73ed6306a5571935abb587177743f8c4febdd [2022-12-14 06:45:42,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:45:42,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:45:42,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:45:42,259 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:45:42,260 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:45:42,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2022-12-14 06:45:44,859 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:45:45,119 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:45:45,120 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2022-12-14 06:45:45,133 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/bin/utaipan-gh47qXpMRh/data/b255d5b0a/147180782e924f6ca72f17aedff9019f/FLAG708fa422c [2022-12-14 06:45:45,147 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/bin/utaipan-gh47qXpMRh/data/b255d5b0a/147180782e924f6ca72f17aedff9019f [2022-12-14 06:45:45,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:45:45,151 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:45:45,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:45:45,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:45:45,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:45:45,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:45,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb8c4e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45, skipping insertion in model container [2022-12-14 06:45:45,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:45,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:45:45,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:45:45,576 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_a240a2f0-b683-4300-9d38-1dc7cc498d72/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[26802,26815] [2022-12-14 06:45:45,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:45:45,705 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:45:45,838 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_a240a2f0-b683-4300-9d38-1dc7cc498d72/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[26802,26815] [2022-12-14 06:45:45,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:45:45,939 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:45:45,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45 WrapperNode [2022-12-14 06:45:45,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:45:45,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:45:45,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:45:45,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:45:45,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:45,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:46,033 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2394 [2022-12-14 06:45:46,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:45:46,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:45:46,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:45:46,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:45:46,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:46,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:46,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:46,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:46,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:46,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:46,108 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:46,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:46,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:45:46,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:45:46,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:45:46,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:45:46,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45" (1/1) ... [2022-12-14 06:45:46,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:45:46,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:45:46,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:45:46,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a240a2f0-b683-4300-9d38-1dc7cc498d72/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:45:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:45:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:45:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:45:46,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:45:46,318 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:45:46,320 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:45:47,489 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:45:47,950 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:45:47,950 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 06:45:47,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:45:47 BoogieIcfgContainer [2022-12-14 06:45:47,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:45:47,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:45:47,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:45:47,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:45:47,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:45:45" (1/3) ... [2022-12-14 06:45:47,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e43b64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:45:47, skipping insertion in model container [2022-12-14 06:45:47,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:45:45" (2/3) ... [2022-12-14 06:45:47,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e43b64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:45:47, skipping insertion in model container [2022-12-14 06:45:47,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:45:47" (3/3) ... [2022-12-14 06:45:47,961 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2022-12-14 06:45:47,974 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:45:47,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:45:48,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:45:48,026 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;@23bb68a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:45:48,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:45:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 518 states, 509 states have (on average 1.7229862475442044) internal successors, (877), 517 states have internal predecessors, (877), 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 06:45:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-12-14 06:45:48,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:48,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:48,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:48,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:48,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1554522921, now seen corresponding path program 1 times [2022-12-14 06:45:48,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:48,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208330670] [2022-12-14 06:45:48,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:48,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:45:48,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:48,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208330670] [2022-12-14 06:45:48,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208330670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:45:48,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:45:48,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:45:48,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143872397] [2022-12-14 06:45:48,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:45:48,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:45:48,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:49,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:45:49,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:45:49,016 INFO L87 Difference]: Start difference. First operand has 518 states, 509 states have (on average 1.7229862475442044) internal successors, (877), 517 states have internal predecessors, (877), 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 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 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 06:45:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:49,411 INFO L93 Difference]: Finished difference Result 1523 states and 2580 transitions. [2022-12-14 06:45:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:45:49,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 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 211 [2022-12-14 06:45:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:49,429 INFO L225 Difference]: With dead ends: 1523 [2022-12-14 06:45:49,429 INFO L226 Difference]: Without dead ends: 996 [2022-12-14 06:45:49,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:45:49,437 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 2448 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2448 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:49,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2448 Valid, 1624 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:45:49,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-12-14 06:45:49,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 994. [2022-12-14 06:45:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 1.4420946626384692) internal successors, (1432), 993 states have internal predecessors, (1432), 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 06:45:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1432 transitions. [2022-12-14 06:45:49,538 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1432 transitions. Word has length 211 [2022-12-14 06:45:49,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:49,539 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 1432 transitions. [2022-12-14 06:45:49,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 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 06:45:49,540 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1432 transitions. [2022-12-14 06:45:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-12-14 06:45:49,544 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:49,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:49,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:45:49,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:49,546 INFO L85 PathProgramCache]: Analyzing trace with hash 300923067, now seen corresponding path program 1 times [2022-12-14 06:45:49,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:49,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107261909] [2022-12-14 06:45:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:49,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:45:49,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:49,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107261909] [2022-12-14 06:45:49,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107261909] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:45:49,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:45:49,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:45:49,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619325800] [2022-12-14 06:45:49,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:45:49,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:45:49,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:49,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:45:49,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:45:49,749 INFO L87 Difference]: Start difference. First operand 994 states and 1432 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 06:45:49,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:49,979 INFO L93 Difference]: Finished difference Result 1987 states and 2909 transitions. [2022-12-14 06:45:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:45:49,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 213 [2022-12-14 06:45:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:49,983 INFO L225 Difference]: With dead ends: 1987 [2022-12-14 06:45:49,983 INFO L226 Difference]: Without dead ends: 1341 [2022-12-14 06:45:49,984 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 06:45:49,985 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 434 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:49,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1453 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:45:49,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-12-14 06:45:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1183. [2022-12-14 06:45:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 1.4585448392554992) internal successors, (1724), 1182 states have internal predecessors, (1724), 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 06:45:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1724 transitions. [2022-12-14 06:45:50,039 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1724 transitions. Word has length 213 [2022-12-14 06:45:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:50,039 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 1724 transitions. [2022-12-14 06:45:50,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 06:45:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1724 transitions. [2022-12-14 06:45:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-12-14 06:45:50,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:50,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:50,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:45:50,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:50,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:50,042 INFO L85 PathProgramCache]: Analyzing trace with hash -246175427, now seen corresponding path program 1 times [2022-12-14 06:45:50,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:50,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841768115] [2022-12-14 06:45:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:50,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:45:50,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:50,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841768115] [2022-12-14 06:45:50,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841768115] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:45:50,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:45:50,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:45:50,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951250881] [2022-12-14 06:45:50,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:45:50,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:45:50,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:50,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:45:50,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:45:50,206 INFO L87 Difference]: Start difference. First operand 1183 states and 1724 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 06:45:50,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:50,504 INFO L93 Difference]: Finished difference Result 3380 states and 4906 transitions. [2022-12-14 06:45:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:45:50,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 213 [2022-12-14 06:45:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:50,512 INFO L225 Difference]: With dead ends: 3380 [2022-12-14 06:45:50,513 INFO L226 Difference]: Without dead ends: 2318 [2022-12-14 06:45:50,514 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 06:45:50,515 INFO L413 NwaCegarLoop]: 1286 mSDtfsCounter, 611 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:50,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1950 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:45:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2022-12-14 06:45:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2316. [2022-12-14 06:45:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.4518358531317495) internal successors, (3361), 2315 states have internal predecessors, (3361), 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 06:45:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3361 transitions. [2022-12-14 06:45:50,690 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3361 transitions. Word has length 213 [2022-12-14 06:45:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:50,691 INFO L495 AbstractCegarLoop]: Abstraction has 2316 states and 3361 transitions. [2022-12-14 06:45:50,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 06:45:50,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3361 transitions. [2022-12-14 06:45:50,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-12-14 06:45:50,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:50,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:50,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:45:50,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:50,697 INFO L85 PathProgramCache]: Analyzing trace with hash 690374513, now seen corresponding path program 1 times [2022-12-14 06:45:50,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:50,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202098750] [2022-12-14 06:45:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:50,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:45:50,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:50,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202098750] [2022-12-14 06:45:50,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202098750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:45:50,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:45:50,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:45:50,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557265093] [2022-12-14 06:45:50,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:45:50,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:45:50,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:50,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:45:50,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:45:50,816 INFO L87 Difference]: Start difference. First operand 2316 states and 3361 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 06:45:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:51,196 INFO L93 Difference]: Finished difference Result 6796 states and 9850 transitions. [2022-12-14 06:45:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:45:51,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 213 [2022-12-14 06:45:51,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:51,205 INFO L225 Difference]: With dead ends: 6796 [2022-12-14 06:45:51,206 INFO L226 Difference]: Without dead ends: 4612 [2022-12-14 06:45:51,207 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 06:45:51,208 INFO L413 NwaCegarLoop]: 1384 mSDtfsCounter, 725 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 2074 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:51,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 2074 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:45:51,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2022-12-14 06:45:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 2319. [2022-12-14 06:45:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 1.451251078515962) internal successors, (3364), 2318 states have internal predecessors, (3364), 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 06:45:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 3364 transitions. [2022-12-14 06:45:51,377 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 3364 transitions. Word has length 213 [2022-12-14 06:45:51,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:51,377 INFO L495 AbstractCegarLoop]: Abstraction has 2319 states and 3364 transitions. [2022-12-14 06:45:51,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 06:45:51,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 3364 transitions. [2022-12-14 06:45:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-12-14 06:45:51,382 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:51,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:51,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:45:51,382 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:51,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:51,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1084389216, now seen corresponding path program 1 times [2022-12-14 06:45:51,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:51,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982882607] [2022-12-14 06:45:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:51,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:45:51,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:51,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982882607] [2022-12-14 06:45:51,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982882607] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:45:51,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:45:51,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:45:51,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636998882] [2022-12-14 06:45:51,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:45:51,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:45:51,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:51,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:45:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:45:51,853 INFO L87 Difference]: Start difference. First operand 2319 states and 3364 transitions. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 4 states have internal predecessors, (214), 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 06:45:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:52,354 INFO L93 Difference]: Finished difference Result 6733 states and 9755 transitions. [2022-12-14 06:45:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:45:52,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 4 states have internal predecessors, (214), 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 214 [2022-12-14 06:45:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:52,364 INFO L225 Difference]: With dead ends: 6733 [2022-12-14 06:45:52,364 INFO L226 Difference]: Without dead ends: 4429 [2022-12-14 06:45:52,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:45:52,368 INFO L413 NwaCegarLoop]: 1123 mSDtfsCounter, 1677 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:52,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1677 Valid, 2433 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:45:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2022-12-14 06:45:52,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 4427. [2022-12-14 06:45:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 4426 states have (on average 1.4403524627202893) internal successors, (6375), 4426 states have internal predecessors, (6375), 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 06:45:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 6375 transitions. [2022-12-14 06:45:52,742 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 6375 transitions. Word has length 214 [2022-12-14 06:45:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:52,743 INFO L495 AbstractCegarLoop]: Abstraction has 4427 states and 6375 transitions. [2022-12-14 06:45:52,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 4 states have internal predecessors, (214), 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 06:45:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 6375 transitions. [2022-12-14 06:45:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-12-14 06:45:52,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:52,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:52,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:45:52,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:52,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:52,754 INFO L85 PathProgramCache]: Analyzing trace with hash 906118663, now seen corresponding path program 1 times [2022-12-14 06:45:52,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:52,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708609501] [2022-12-14 06:45:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:52,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:45:53,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:53,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708609501] [2022-12-14 06:45:53,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708609501] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:45:53,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:45:53,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:45:53,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616456087] [2022-12-14 06:45:53,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:45:53,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:45:53,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:53,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:45:53,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:45:53,237 INFO L87 Difference]: Start difference. First operand 4427 states and 6375 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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 06:45:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:53,928 INFO L93 Difference]: Finished difference Result 12778 states and 18359 transitions. [2022-12-14 06:45:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:45:53,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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 215 [2022-12-14 06:45:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:53,948 INFO L225 Difference]: With dead ends: 12778 [2022-12-14 06:45:53,948 INFO L226 Difference]: Without dead ends: 8489 [2022-12-14 06:45:53,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:45:53,953 INFO L413 NwaCegarLoop]: 1115 mSDtfsCounter, 1569 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:53,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1569 Valid, 1774 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:45:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8489 states. [2022-12-14 06:45:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8489 to 8487. [2022-12-14 06:45:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8487 states, 8486 states have (on average 1.4291774687720953) internal successors, (12128), 8486 states have internal predecessors, (12128), 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 06:45:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8487 states to 8487 states and 12128 transitions. [2022-12-14 06:45:54,537 INFO L78 Accepts]: Start accepts. Automaton has 8487 states and 12128 transitions. Word has length 215 [2022-12-14 06:45:54,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:54,537 INFO L495 AbstractCegarLoop]: Abstraction has 8487 states and 12128 transitions. [2022-12-14 06:45:54,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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 06:45:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 8487 states and 12128 transitions. [2022-12-14 06:45:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-12-14 06:45:54,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:54,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:54,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:45:54,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:54,546 INFO L85 PathProgramCache]: Analyzing trace with hash 264160735, now seen corresponding path program 1 times [2022-12-14 06:45:54,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:54,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847931686] [2022-12-14 06:45:54,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:54,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:45:54,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:54,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847931686] [2022-12-14 06:45:54,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847931686] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:45:54,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:45:54,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:45:54,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623308815] [2022-12-14 06:45:54,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:45:54,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:45:54,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:54,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:45:54,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:45:54,885 INFO L87 Difference]: Start difference. First operand 8487 states and 12128 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 06:45:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:56,207 INFO L93 Difference]: Finished difference Result 24867 states and 35463 transitions. [2022-12-14 06:45:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:45:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 217 [2022-12-14 06:45:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:56,234 INFO L225 Difference]: With dead ends: 24867 [2022-12-14 06:45:56,234 INFO L226 Difference]: Without dead ends: 16522 [2022-12-14 06:45:56,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:45:56,242 INFO L413 NwaCegarLoop]: 698 mSDtfsCounter, 1966 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:56,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1966 Valid, 1348 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:45:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16522 states. [2022-12-14 06:45:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16522 to 16520. [2022-12-14 06:45:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16520 states, 16519 states have (on average 1.4172770748834675) internal successors, (23412), 16519 states have internal predecessors, (23412), 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 06:45:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16520 states to 16520 states and 23412 transitions. [2022-12-14 06:45:57,654 INFO L78 Accepts]: Start accepts. Automaton has 16520 states and 23412 transitions. Word has length 217 [2022-12-14 06:45:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:57,655 INFO L495 AbstractCegarLoop]: Abstraction has 16520 states and 23412 transitions. [2022-12-14 06:45:57,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 06:45:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 16520 states and 23412 transitions. [2022-12-14 06:45:57,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-12-14 06:45:57,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:57,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:45:57,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:45:57,668 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:57,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2102469661, now seen corresponding path program 1 times [2022-12-14 06:45:57,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:57,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302180670] [2022-12-14 06:45:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:57,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:45:57,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:57,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302180670] [2022-12-14 06:45:57,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302180670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:45:57,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:45:57,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:45:57,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407555427] [2022-12-14 06:45:57,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:45:57,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:45:57,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:45:57,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:45:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:45:57,786 INFO L87 Difference]: Start difference. First operand 16520 states and 23412 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 06:45:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:59,766 INFO L93 Difference]: Finished difference Result 34528 states and 50058 transitions. [2022-12-14 06:45:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:45:59,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 219 [2022-12-14 06:45:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:59,796 INFO L225 Difference]: With dead ends: 34528 [2022-12-14 06:45:59,797 INFO L226 Difference]: Without dead ends: 23154 [2022-12-14 06:45:59,805 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 06:45:59,806 INFO L413 NwaCegarLoop]: 915 mSDtfsCounter, 396 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:59,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 1417 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:45:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23154 states. [2022-12-14 06:46:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23154 to 21344. [2022-12-14 06:46:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21344 states, 21343 states have (on average 1.4403785784566367) internal successors, (30742), 21343 states have internal predecessors, (30742), 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 06:46:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21344 states to 21344 states and 30742 transitions. [2022-12-14 06:46:01,330 INFO L78 Accepts]: Start accepts. Automaton has 21344 states and 30742 transitions. Word has length 219 [2022-12-14 06:46:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:46:01,330 INFO L495 AbstractCegarLoop]: Abstraction has 21344 states and 30742 transitions. [2022-12-14 06:46:01,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 06:46:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 21344 states and 30742 transitions. [2022-12-14 06:46:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-12-14 06:46:01,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:01,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:46:01,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:46:01,342 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:01,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:01,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1469954134, now seen corresponding path program 1 times [2022-12-14 06:46:01,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:01,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468618809] [2022-12-14 06:46:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:01,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:46:01,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:01,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468618809] [2022-12-14 06:46:01,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468618809] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:46:01,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:46:01,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:46:01,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249536795] [2022-12-14 06:46:01,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:46:01,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:46:01,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:01,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:46:01,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:46:01,460 INFO L87 Difference]: Start difference. First operand 21344 states and 30742 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 06:46:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:46:04,935 INFO L93 Difference]: Finished difference Result 61419 states and 88171 transitions. [2022-12-14 06:46:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:46:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 219 [2022-12-14 06:46:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:46:04,990 INFO L225 Difference]: With dead ends: 61419 [2022-12-14 06:46:04,991 INFO L226 Difference]: Without dead ends: 41637 [2022-12-14 06:46:05,008 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 06:46:05,008 INFO L413 NwaCegarLoop]: 1302 mSDtfsCounter, 591 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:46:05,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1963 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:46:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41637 states. [2022-12-14 06:46:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41637 to 41635. [2022-12-14 06:46:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41635 states, 41634 states have (on average 1.4315943699860691) internal successors, (59603), 41634 states have internal predecessors, (59603), 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 06:46:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41635 states to 41635 states and 59603 transitions. [2022-12-14 06:46:08,536 INFO L78 Accepts]: Start accepts. Automaton has 41635 states and 59603 transitions. Word has length 219 [2022-12-14 06:46:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:46:08,536 INFO L495 AbstractCegarLoop]: Abstraction has 41635 states and 59603 transitions. [2022-12-14 06:46:08,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 06:46:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 41635 states and 59603 transitions. [2022-12-14 06:46:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-12-14 06:46:08,556 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:08,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:46:08,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:46:08,556 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:08,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:08,557 INFO L85 PathProgramCache]: Analyzing trace with hash -180575735, now seen corresponding path program 1 times [2022-12-14 06:46:08,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:08,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834023092] [2022-12-14 06:46:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:08,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:46:08,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:08,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834023092] [2022-12-14 06:46:08,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834023092] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:46:08,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:46:08,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:46:08,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510891487] [2022-12-14 06:46:08,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:46:08,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:46:08,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:46:08,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:46:08,644 INFO L87 Difference]: Start difference. First operand 41635 states and 59603 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 06:46:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:46:15,276 INFO L93 Difference]: Finished difference Result 122970 states and 175927 transitions. [2022-12-14 06:46:15,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:46:15,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 219 [2022-12-14 06:46:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:46:15,374 INFO L225 Difference]: With dead ends: 122970 [2022-12-14 06:46:15,374 INFO L226 Difference]: Without dead ends: 83021 [2022-12-14 06:46:15,397 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 06:46:15,397 INFO L413 NwaCegarLoop]: 1357 mSDtfsCounter, 698 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 2044 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:46:15,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 2044 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:46:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83021 states. [2022-12-14 06:46:19,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83021 to 41668. [2022-12-14 06:46:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41668 states, 41667 states have (on average 1.4312525499796) internal successors, (59636), 41667 states have internal predecessors, (59636), 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 06:46:19,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41668 states to 41668 states and 59636 transitions. [2022-12-14 06:46:19,608 INFO L78 Accepts]: Start accepts. Automaton has 41668 states and 59636 transitions. Word has length 219 [2022-12-14 06:46:19,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:46:19,608 INFO L495 AbstractCegarLoop]: Abstraction has 41668 states and 59636 transitions. [2022-12-14 06:46:19,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 06:46:19,608 INFO L276 IsEmpty]: Start isEmpty. Operand 41668 states and 59636 transitions. [2022-12-14 06:46:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-12-14 06:46:19,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:19,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:46:19,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:46:19,626 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1284308728, now seen corresponding path program 1 times [2022-12-14 06:46:19,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:19,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110075893] [2022-12-14 06:46:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:19,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:46:20,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:20,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110075893] [2022-12-14 06:46:20,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110075893] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:46:20,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:46:20,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:46:20,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726052695] [2022-12-14 06:46:20,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:46:20,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:46:20,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:20,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:46:20,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:46:20,067 INFO L87 Difference]: Start difference. First operand 41668 states and 59636 transitions. Second operand has 5 states, 5 states have (on average 44.0) internal successors, (220), 4 states have internal predecessors, (220), 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 06:46:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:46:27,944 INFO L93 Difference]: Finished difference Result 121607 states and 173875 transitions. [2022-12-14 06:46:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:46:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.0) internal successors, (220), 4 states have internal predecessors, (220), 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 220 [2022-12-14 06:46:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:46:28,051 INFO L225 Difference]: With dead ends: 121607 [2022-12-14 06:46:28,051 INFO L226 Difference]: Without dead ends: 80139 [2022-12-14 06:46:28,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:46:28,077 INFO L413 NwaCegarLoop]: 1100 mSDtfsCounter, 2259 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2259 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:46:28,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2259 Valid, 1756 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:46:28,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80139 states. [2022-12-14 06:46:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80139 to 80137. [2022-12-14 06:46:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80137 states, 80136 states have (on average 1.422968453628831) internal successors, (114031), 80136 states have internal predecessors, (114031), 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 06:46:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80137 states to 80137 states and 114031 transitions. [2022-12-14 06:46:36,116 INFO L78 Accepts]: Start accepts. Automaton has 80137 states and 114031 transitions. Word has length 220 [2022-12-14 06:46:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:46:36,117 INFO L495 AbstractCegarLoop]: Abstraction has 80137 states and 114031 transitions. [2022-12-14 06:46:36,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.0) internal successors, (220), 4 states have internal predecessors, (220), 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 06:46:36,117 INFO L276 IsEmpty]: Start isEmpty. Operand 80137 states and 114031 transitions. [2022-12-14 06:46:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-12-14 06:46:36,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:36,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:46:36,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:46:36,151 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:36,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:36,151 INFO L85 PathProgramCache]: Analyzing trace with hash -991283565, now seen corresponding path program 1 times [2022-12-14 06:46:36,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:36,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046914427] [2022-12-14 06:46:36,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:36,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:46:36,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:36,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046914427] [2022-12-14 06:46:36,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046914427] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:46:36,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:46:36,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:46:36,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280630337] [2022-12-14 06:46:36,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:46:36,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:46:36,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:46:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:46:36,611 INFO L87 Difference]: Start difference. First operand 80137 states and 114031 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 06:46:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:46:52,462 INFO L93 Difference]: Finished difference Result 230399 states and 326947 transitions. [2022-12-14 06:46:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:46:52,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 221 [2022-12-14 06:46:52,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:46:52,656 INFO L225 Difference]: With dead ends: 230399 [2022-12-14 06:46:52,657 INFO L226 Difference]: Without dead ends: 152526 [2022-12-14 06:46:52,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:46:52,707 INFO L413 NwaCegarLoop]: 1098 mSDtfsCounter, 1556 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1556 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:46:52,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1556 Valid, 1758 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:46:52,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152526 states. [2022-12-14 06:47:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152526 to 152524. [2022-12-14 06:47:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152524 states, 152523 states have (on average 1.412075555817811) internal successors, (215374), 152523 states have internal predecessors, (215374), 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 06:47:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152524 states to 152524 states and 215374 transitions. [2022-12-14 06:47:09,521 INFO L78 Accepts]: Start accepts. Automaton has 152524 states and 215374 transitions. Word has length 221 [2022-12-14 06:47:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:47:09,521 INFO L495 AbstractCegarLoop]: Abstraction has 152524 states and 215374 transitions. [2022-12-14 06:47:09,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 06:47:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 152524 states and 215374 transitions. [2022-12-14 06:47:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-12-14 06:47:09,596 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:47:09,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:47:09,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:47:09,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:47:09,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:47:09,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1809795328, now seen corresponding path program 1 times [2022-12-14 06:47:09,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:47:09,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803891202] [2022-12-14 06:47:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:47:09,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:47:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:47:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:47:09,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:47:09,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803891202] [2022-12-14 06:47:09,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803891202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:47:09,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:47:09,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:47:09,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275830916] [2022-12-14 06:47:09,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:47:09,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:47:09,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:47:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:47:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:47:09,897 INFO L87 Difference]: Start difference. First operand 152524 states and 215374 transitions. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 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 06:47:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:47:28,820 INFO L93 Difference]: Finished difference Result 322880 states and 453896 transitions. [2022-12-14 06:47:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:47:28,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 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 223 [2022-12-14 06:47:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:47:29,053 INFO L225 Difference]: With dead ends: 322880 [2022-12-14 06:47:29,053 INFO L226 Difference]: Without dead ends: 171857 [2022-12-14 06:47:29,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:47:29,135 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 1914 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:47:29,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1914 Valid, 1359 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:47:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171857 states. [2022-12-14 06:47:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171857 to 154447. [2022-12-14 06:47:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154447 states, 154446 states have (on average 1.4120080804941533) internal successors, (218079), 154446 states have internal predecessors, (218079), 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 06:47:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154447 states to 154447 states and 218079 transitions. [2022-12-14 06:47:47,116 INFO L78 Accepts]: Start accepts. Automaton has 154447 states and 218079 transitions. Word has length 223 [2022-12-14 06:47:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:47:47,117 INFO L495 AbstractCegarLoop]: Abstraction has 154447 states and 218079 transitions. [2022-12-14 06:47:47,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 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 06:47:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand 154447 states and 218079 transitions. [2022-12-14 06:47:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-12-14 06:47:47,194 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:47:47,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:47:47,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:47:47,194 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:47:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:47:47,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1194104234, now seen corresponding path program 1 times [2022-12-14 06:47:47,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:47:47,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28664953] [2022-12-14 06:47:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:47:47,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:47:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:47:47,276 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 06:47:47,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:47:47,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28664953] [2022-12-14 06:47:47,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28664953] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:47:47,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:47:47,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:47:47,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930343392] [2022-12-14 06:47:47,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:47:47,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:47:47,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:47:47,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:47:47,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:47:47,278 INFO L87 Difference]: Start difference. First operand 154447 states and 218079 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 06:48:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:48:16,138 INFO L93 Difference]: Finished difference Result 341019 states and 492377 transitions. [2022-12-14 06:48:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:48:16,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 225 [2022-12-14 06:48:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:48:16,504 INFO L225 Difference]: With dead ends: 341019 [2022-12-14 06:48:16,504 INFO L226 Difference]: Without dead ends: 228805 [2022-12-14 06:48:16,584 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 06:48:16,584 INFO L413 NwaCegarLoop]: 880 mSDtfsCounter, 358 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:48:16,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 1382 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:48:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228805 states. [2022-12-14 06:48:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228805 to 218563. [2022-12-14 06:48:45,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218563 states, 218562 states have (on average 1.436567198323588) internal successors, (313979), 218562 states have internal predecessors, (313979), 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 06:48:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218563 states to 218563 states and 313979 transitions. [2022-12-14 06:48:45,665 INFO L78 Accepts]: Start accepts. Automaton has 218563 states and 313979 transitions. Word has length 225 [2022-12-14 06:48:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:48:45,665 INFO L495 AbstractCegarLoop]: Abstraction has 218563 states and 313979 transitions. [2022-12-14 06:48:45,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 06:48:45,665 INFO L276 IsEmpty]: Start isEmpty. Operand 218563 states and 313979 transitions. [2022-12-14 06:48:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-12-14 06:48:45,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:48:45,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:48:45,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:48:45,737 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:48:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:48:45,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2137137458, now seen corresponding path program 1 times [2022-12-14 06:48:45,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:48:45,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562702238] [2022-12-14 06:48:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:48:45,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:48:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:48:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:48:45,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:48:45,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562702238] [2022-12-14 06:48:45,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562702238] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:48:45,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:48:45,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:48:45,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860050698] [2022-12-14 06:48:45,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:48:45,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:48:45,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:48:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:48:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:48:45,802 INFO L87 Difference]: Start difference. First operand 218563 states and 313979 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 06:49:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:49:41,693 INFO L93 Difference]: Finished difference Result 651825 states and 936571 transitions. [2022-12-14 06:49:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:49:41,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 225 [2022-12-14 06:49:41,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:49:42,462 INFO L225 Difference]: With dead ends: 651825 [2022-12-14 06:49:42,462 INFO L226 Difference]: Without dead ends: 435441 [2022-12-14 06:49:42,622 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 06:49:42,623 INFO L413 NwaCegarLoop]: 1330 mSDtfsCounter, 671 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 2014 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:49:42,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 2014 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:49:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435441 states. [2022-12-14 06:50:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435441 to 218787. [2022-12-14 06:50:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218787 states, 218786 states have (on average 1.436120227071202) internal successors, (314203), 218786 states have internal predecessors, (314203), 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 06:50:15,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218787 states to 218787 states and 314203 transitions. [2022-12-14 06:50:15,821 INFO L78 Accepts]: Start accepts. Automaton has 218787 states and 314203 transitions. Word has length 225 [2022-12-14 06:50:15,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:50:15,821 INFO L495 AbstractCegarLoop]: Abstraction has 218787 states and 314203 transitions. [2022-12-14 06:50:15,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 06:50:15,821 INFO L276 IsEmpty]: Start isEmpty. Operand 218787 states and 314203 transitions. [2022-12-14 06:50:15,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-12-14 06:50:15,900 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:50:15,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:50:15,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 06:50:15,901 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:50:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:50:15,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1457279211, now seen corresponding path program 1 times [2022-12-14 06:50:15,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:50:15,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408748323] [2022-12-14 06:50:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:50:15,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:50:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:50:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:50:16,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:50:16,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408748323] [2022-12-14 06:50:16,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408748323] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:50:16,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:50:16,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:50:16,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680873812] [2022-12-14 06:50:16,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:50:16,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:50:16,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:50:16,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:50:16,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:50:16,271 INFO L87 Difference]: Start difference. First operand 218787 states and 314203 transitions. Second operand has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 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 06:50:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:50:50,091 INFO L93 Difference]: Finished difference Result 456371 states and 653107 transitions. [2022-12-14 06:50:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:50:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 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 226 [2022-12-14 06:50:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:50:50,458 INFO L225 Difference]: With dead ends: 456371 [2022-12-14 06:50:50,459 INFO L226 Difference]: Without dead ends: 239271 [2022-12-14 06:50:50,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:50:50,585 INFO L413 NwaCegarLoop]: 1086 mSDtfsCounter, 2248 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:50:50,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2248 Valid, 1739 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:50:50,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239271 states. [2022-12-14 06:51:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239271 to 220135. [2022-12-14 06:51:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220135 states, 220134 states have (on average 1.4361570679676925) internal successors, (316147), 220134 states have internal predecessors, (316147), 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 06:51:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220135 states to 220135 states and 316147 transitions. [2022-12-14 06:51:23,930 INFO L78 Accepts]: Start accepts. Automaton has 220135 states and 316147 transitions. Word has length 226 [2022-12-14 06:51:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:23,930 INFO L495 AbstractCegarLoop]: Abstraction has 220135 states and 316147 transitions. [2022-12-14 06:51:23,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 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 06:51:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 220135 states and 316147 transitions. [2022-12-14 06:51:24,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-12-14 06:51:24,122 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:24,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:24,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 06:51:24,123 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:24,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:24,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1474050226, now seen corresponding path program 1 times [2022-12-14 06:51:24,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:24,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258204467] [2022-12-14 06:51:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:24,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:51:24,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:24,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258204467] [2022-12-14 06:51:24,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258204467] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:24,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:51:24,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:51:24,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020603689] [2022-12-14 06:51:24,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:24,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:51:24,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:24,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:51:24,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:51:24,414 INFO L87 Difference]: Start difference. First operand 220135 states and 316147 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 06:52:28,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:28,357 INFO L93 Difference]: Finished difference Result 588504 states and 848891 transitions. [2022-12-14 06:52:28,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:52:28,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 227 [2022-12-14 06:52:28,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:29,074 INFO L225 Difference]: With dead ends: 588504 [2022-12-14 06:52:29,074 INFO L226 Difference]: Without dead ends: 413774 [2022-12-14 06:52:29,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:52:29,227 INFO L413 NwaCegarLoop]: 1051 mSDtfsCounter, 1505 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:29,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1505 Valid, 1712 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:52:29,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413774 states. [2022-12-14 06:53:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413774 to 413772. [2022-12-14 06:53:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413772 states, 413771 states have (on average 1.4261052611226983) internal successors, (590081), 413771 states have internal predecessors, (590081), 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 06:53:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413772 states to 413772 states and 590081 transitions. [2022-12-14 06:53:36,896 INFO L78 Accepts]: Start accepts. Automaton has 413772 states and 590081 transitions. Word has length 227 [2022-12-14 06:53:36,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:53:36,897 INFO L495 AbstractCegarLoop]: Abstraction has 413772 states and 590081 transitions. [2022-12-14 06:53:36,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 06:53:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 413772 states and 590081 transitions. [2022-12-14 06:53:37,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-12-14 06:53:37,061 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:53:37,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:53:37,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 06:53:37,061 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:53:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:53:37,062 INFO L85 PathProgramCache]: Analyzing trace with hash 793403069, now seen corresponding path program 1 times [2022-12-14 06:53:37,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:53:37,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564895971] [2022-12-14 06:53:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:53:37,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:53:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:53:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:53:37,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:53:37,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564895971] [2022-12-14 06:53:37,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564895971] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:53:37,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:53:37,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:53:37,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863374105] [2022-12-14 06:53:37,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:53:37,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:53:37,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:53:37,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:53:37,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:53:37,404 INFO L87 Difference]: Start difference. First operand 413772 states and 590081 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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 06:55:55,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:55:55,180 INFO L93 Difference]: Finished difference Result 1204799 states and 1714183 transitions. [2022-12-14 06:55:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:55:55,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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 229 [2022-12-14 06:55:55,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:55:56,764 INFO L225 Difference]: With dead ends: 1204799 [2022-12-14 06:55:56,764 INFO L226 Difference]: Without dead ends: 798544 [2022-12-14 06:55:57,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:55:57,128 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 1836 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1836 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:55:57,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1836 Valid, 1352 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:55:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798544 states.