./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c10298174dc8a10464920798633331c54bfb52691f05a28be9f9c0183eefe1d6 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:27:40,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:27:40,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:27:40,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:27:40,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:27:40,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:27:40,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:27:40,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:27:40,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:27:40,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:27:40,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:27:40,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:27:40,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:27:40,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:27:40,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:27:40,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:27:40,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:27:40,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:27:40,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:27:40,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:27:40,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:27:40,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:27:40,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:27:40,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:27:40,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:27:40,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:27:40,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:27:40,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:27:40,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:27:40,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:27:40,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:27:40,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:27:40,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:27:40,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:27:40,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:27:40,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:27:40,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:27:40,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:27:40,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:27:40,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:27:40,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:27:40,231 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:27:40,254 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:27:40,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:27:40,255 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:27:40,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:27:40,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:27:40,255 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:27:40,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:27:40,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:27:40,256 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:27:40,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:27:40,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:27:40,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:27:40,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:27:40,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:27:40,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:27:40,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:27:40,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:27:40,258 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:27:40,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:27:40,258 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:27:40,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:27:40,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:27:40,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:27:40,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:27:40,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:27:40,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:27:40,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:27:40,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:27:40,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:27:40,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:27:40,259 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:27:40,260 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:27:40,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:27:40,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:27:40,260 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_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10298174dc8a10464920798633331c54bfb52691f05a28be9f9c0183eefe1d6 [2021-12-06 19:27:40,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:27:40,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:27:40,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:27:40,468 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:27:40,469 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:27:40,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c [2021-12-06 19:27:40,524 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/data/31d23ef46/455150485aa547c99c0950568bcecbf8/FLAG022319b53 [2021-12-06 19:27:41,039 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:27:41,039 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c [2021-12-06 19:27:41,057 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/data/31d23ef46/455150485aa547c99c0950568bcecbf8/FLAG022319b53 [2021-12-06 19:27:41,547 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/data/31d23ef46/455150485aa547c99c0950568bcecbf8 [2021-12-06 19:27:41,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:27:41,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:27:41,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:27:41,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:27:41,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:27:41,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:27:41" (1/1) ... [2021-12-06 19:27:41,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@243efd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41, skipping insertion in model container [2021-12-06 19:27:41,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:27:41" (1/1) ... [2021-12-06 19:27:41,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:27:41,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:27:41,829 WARN L230 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_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c[55979,55992] [2021-12-06 19:27:41,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:27:41,839 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:27:41,908 WARN L230 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_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c[55979,55992] [2021-12-06 19:27:41,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:27:41,920 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:27:41,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41 WrapperNode [2021-12-06 19:27:41,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:27:41,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:27:41,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:27:41,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:27:41,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41" (1/1) ... [2021-12-06 19:27:41,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41" (1/1) ... [2021-12-06 19:27:41,997 INFO L137 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 2093 [2021-12-06 19:27:41,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:27:41,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:27:41,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:27:41,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:27:42,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41" (1/1) ... [2021-12-06 19:27:42,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41" (1/1) ... [2021-12-06 19:27:42,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41" (1/1) ... [2021-12-06 19:27:42,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41" (1/1) ... [2021-12-06 19:27:42,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41" (1/1) ... [2021-12-06 19:27:42,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41" (1/1) ... [2021-12-06 19:27:42,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41" (1/1) ... [2021-12-06 19:27:42,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:27:42,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:27:42,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:27:42,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:27:42,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41" (1/1) ... [2021-12-06 19:27:42,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:27:42,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:27:42,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:27:42,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d935ea0-ef2b-4cf7-a5c0-836f73bc505f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:27:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:27:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:27:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:27:42,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:27:42,266 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:27:42,267 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:27:43,201 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:27:43,214 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:27:43,214 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 19:27:43,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:27:43 BoogieIcfgContainer [2021-12-06 19:27:43,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:27:43,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:27:43,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:27:43,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:27:43,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:27:41" (1/3) ... [2021-12-06 19:27:43,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4584d749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:27:43, skipping insertion in model container [2021-12-06 19:27:43,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:27:41" (2/3) ... [2021-12-06 19:27:43,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4584d749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:27:43, skipping insertion in model container [2021-12-06 19:27:43,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:27:43" (3/3) ... [2021-12-06 19:27:43,223 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c [2021-12-06 19:27:43,227 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:27:43,227 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:27:43,265 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:27:43,270 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:27:43,270 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:27:43,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 726 states, 724 states have (on average 1.841160220994475) internal successors, (1333), 725 states have internal predecessors, (1333), 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) [2021-12-06 19:27:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 19:27:43,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:43,314 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:43,314 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash 551316022, now seen corresponding path program 1 times [2021-12-06 19:27:43,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:43,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375877247] [2021-12-06 19:27:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:43,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:43,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:43,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375877247] [2021-12-06 19:27:43,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375877247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:43,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:43,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:27:43,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281526076] [2021-12-06 19:27:43,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:43,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:27:43,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:43,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:27:43,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:27:43,712 INFO L87 Difference]: Start difference. First operand has 726 states, 724 states have (on average 1.841160220994475) internal successors, (1333), 725 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 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) [2021-12-06 19:27:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:43,900 INFO L93 Difference]: Finished difference Result 921 states and 1671 transitions. [2021-12-06 19:27:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:27:43,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 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 153 [2021-12-06 19:27:43,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:43,922 INFO L225 Difference]: With dead ends: 921 [2021-12-06 19:27:43,922 INFO L226 Difference]: Without dead ends: 722 [2021-12-06 19:27:43,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:27:43,930 INFO L933 BasicCegarLoop]: 1324 mSDtfsCounter, 3 mSDsluCounter, 3924 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5248 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:43,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5248 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:27:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-12-06 19:27:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 722. [2021-12-06 19:27:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 1.7766990291262137) internal successors, (1281), 721 states have internal predecessors, (1281), 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) [2021-12-06 19:27:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1281 transitions. [2021-12-06 19:27:44,012 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1281 transitions. Word has length 153 [2021-12-06 19:27:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:44,013 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 1281 transitions. [2021-12-06 19:27:44,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 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) [2021-12-06 19:27:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1281 transitions. [2021-12-06 19:27:44,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-06 19:27:44,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:44,019 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:44,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:27:44,019 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:44,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2070541714, now seen corresponding path program 1 times [2021-12-06 19:27:44,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:44,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624167485] [2021-12-06 19:27:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:44,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:44,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:44,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624167485] [2021-12-06 19:27:44,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624167485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:44,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:44,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:27:44,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931799221] [2021-12-06 19:27:44,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:44,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:27:44,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:44,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:27:44,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:27:44,191 INFO L87 Difference]: Start difference. First operand 722 states and 1281 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:27:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:44,239 INFO L93 Difference]: Finished difference Result 1090 states and 1915 transitions. [2021-12-06 19:27:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:27:44,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-12-06 19:27:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:44,245 INFO L225 Difference]: With dead ends: 1090 [2021-12-06 19:27:44,245 INFO L226 Difference]: Without dead ends: 899 [2021-12-06 19:27:44,247 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:27:44,248 INFO L933 BasicCegarLoop]: 1274 mSDtfsCounter, 295 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:44,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 2504 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:27:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-12-06 19:27:44,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 896. [2021-12-06 19:27:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.7620111731843575) internal successors, (1577), 895 states have internal predecessors, (1577), 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) [2021-12-06 19:27:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1577 transitions. [2021-12-06 19:27:44,271 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1577 transitions. Word has length 197 [2021-12-06 19:27:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:44,272 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1577 transitions. [2021-12-06 19:27:44,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:27:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1577 transitions. [2021-12-06 19:27:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-06 19:27:44,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:44,275 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:44,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:27:44,275 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1987778070, now seen corresponding path program 1 times [2021-12-06 19:27:44,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:44,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715600080] [2021-12-06 19:27:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:44,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:44,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:44,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715600080] [2021-12-06 19:27:44,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715600080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:44,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:44,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:27:44,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809848279] [2021-12-06 19:27:44,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:44,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:27:44,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:44,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:27:44,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:27:44,399 INFO L87 Difference]: Start difference. First operand 896 states and 1577 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2021-12-06 19:27:44,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:44,449 INFO L93 Difference]: Finished difference Result 1602 states and 2785 transitions. [2021-12-06 19:27:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:27:44,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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 201 [2021-12-06 19:27:44,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:44,458 INFO L225 Difference]: With dead ends: 1602 [2021-12-06 19:27:44,458 INFO L226 Difference]: Without dead ends: 1237 [2021-12-06 19:27:44,460 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:27:44,461 INFO L933 BasicCegarLoop]: 1278 mSDtfsCounter, 295 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:44,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 2517 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:27:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-12-06 19:27:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1233. [2021-12-06 19:27:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 1.7467532467532467) internal successors, (2152), 1232 states have internal predecessors, (2152), 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) [2021-12-06 19:27:44,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2152 transitions. [2021-12-06 19:27:44,505 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2152 transitions. Word has length 201 [2021-12-06 19:27:44,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:44,506 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 2152 transitions. [2021-12-06 19:27:44,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2021-12-06 19:27:44,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2152 transitions. [2021-12-06 19:27:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-06 19:27:44,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:44,511 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:44,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:27:44,511 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2063135678, now seen corresponding path program 1 times [2021-12-06 19:27:44,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:44,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709443727] [2021-12-06 19:27:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:44,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:44,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:44,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709443727] [2021-12-06 19:27:44,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709443727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:44,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:44,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:27:44,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207291684] [2021-12-06 19:27:44,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:44,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:27:44,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:44,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:27:44,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:27:44,629 INFO L87 Difference]: Start difference. First operand 1233 states and 2152 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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) [2021-12-06 19:27:44,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:44,693 INFO L93 Difference]: Finished difference Result 2589 states and 4466 transitions. [2021-12-06 19:27:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:27:44,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 205 [2021-12-06 19:27:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:44,705 INFO L225 Difference]: With dead ends: 2589 [2021-12-06 19:27:44,706 INFO L226 Difference]: Without dead ends: 1887 [2021-12-06 19:27:44,707 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:27:44,709 INFO L933 BasicCegarLoop]: 1278 mSDtfsCounter, 287 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:44,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 2518 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:27:44,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-12-06 19:27:44,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1881. [2021-12-06 19:27:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 1.7297872340425533) internal successors, (3252), 1880 states have internal predecessors, (3252), 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) [2021-12-06 19:27:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 3252 transitions. [2021-12-06 19:27:44,760 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 3252 transitions. Word has length 205 [2021-12-06 19:27:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:44,761 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 3252 transitions. [2021-12-06 19:27:44,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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) [2021-12-06 19:27:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 3252 transitions. [2021-12-06 19:27:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-06 19:27:44,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:44,765 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:44,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:27:44,765 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:44,766 INFO L85 PathProgramCache]: Analyzing trace with hash 817472358, now seen corresponding path program 1 times [2021-12-06 19:27:44,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:44,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166927108] [2021-12-06 19:27:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:44,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:44,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:44,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166927108] [2021-12-06 19:27:44,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166927108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:44,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:44,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:27:44,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997201588] [2021-12-06 19:27:44,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:44,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:27:44,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:27:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:27:44,869 INFO L87 Difference]: Start difference. First operand 1881 states and 3252 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 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) [2021-12-06 19:27:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:44,923 INFO L93 Difference]: Finished difference Result 4485 states and 7678 transitions. [2021-12-06 19:27:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:27:44,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 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 209 [2021-12-06 19:27:44,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:44,942 INFO L225 Difference]: With dead ends: 4485 [2021-12-06 19:27:44,942 INFO L226 Difference]: Without dead ends: 3135 [2021-12-06 19:27:44,945 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:27:44,946 INFO L933 BasicCegarLoop]: 1278 mSDtfsCounter, 279 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2519 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:44,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 2519 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:27:44,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2021-12-06 19:27:45,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3125. [2021-12-06 19:27:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 3124 states have (on average 1.7131882202304738) internal successors, (5352), 3124 states have internal predecessors, (5352), 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) [2021-12-06 19:27:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 5352 transitions. [2021-12-06 19:27:45,027 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 5352 transitions. Word has length 209 [2021-12-06 19:27:45,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:45,028 INFO L470 AbstractCegarLoop]: Abstraction has 3125 states and 5352 transitions. [2021-12-06 19:27:45,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 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) [2021-12-06 19:27:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 5352 transitions. [2021-12-06 19:27:45,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-06 19:27:45,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:45,032 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:45,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:27:45,032 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:45,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash -85514994, now seen corresponding path program 1 times [2021-12-06 19:27:45,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:45,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384447111] [2021-12-06 19:27:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:45,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:45,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:45,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384447111] [2021-12-06 19:27:45,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384447111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:45,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:45,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:27:45,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453677275] [2021-12-06 19:27:45,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:45,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:27:45,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:27:45,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:27:45,116 INFO L87 Difference]: Start difference. First operand 3125 states and 5352 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) [2021-12-06 19:27:45,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:45,219 INFO L93 Difference]: Finished difference Result 8121 states and 13802 transitions. [2021-12-06 19:27:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:27:45,220 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 [2021-12-06 19:27:45,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:45,250 INFO L225 Difference]: With dead ends: 8121 [2021-12-06 19:27:45,251 INFO L226 Difference]: Without dead ends: 5527 [2021-12-06 19:27:45,255 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:27:45,256 INFO L933 BasicCegarLoop]: 1278 mSDtfsCounter, 271 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:45,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 2520 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:27:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5527 states. [2021-12-06 19:27:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5527 to 5509. [2021-12-06 19:27:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5509 states, 5508 states have (on average 1.6978939724037763) internal successors, (9352), 5508 states have internal predecessors, (9352), 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) [2021-12-06 19:27:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5509 states to 5509 states and 9352 transitions. [2021-12-06 19:27:45,390 INFO L78 Accepts]: Start accepts. Automaton has 5509 states and 9352 transitions. Word has length 213 [2021-12-06 19:27:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:45,390 INFO L470 AbstractCegarLoop]: Abstraction has 5509 states and 9352 transitions. [2021-12-06 19:27:45,390 INFO L471 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) [2021-12-06 19:27:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 5509 states and 9352 transitions. [2021-12-06 19:27:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-06 19:27:45,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:45,394 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:45,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:27:45,394 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:45,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2127857482, now seen corresponding path program 1 times [2021-12-06 19:27:45,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:45,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754277839] [2021-12-06 19:27:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:45,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:45,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:45,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754277839] [2021-12-06 19:27:45,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754277839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:45,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:45,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:27:45,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514261687] [2021-12-06 19:27:45,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:45,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:27:45,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:45,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:27:45,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:27:45,507 INFO L87 Difference]: Start difference. First operand 5509 states and 9352 transitions. Second operand has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 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) [2021-12-06 19:27:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:46,122 INFO L93 Difference]: Finished difference Result 33737 states and 57330 transitions. [2021-12-06 19:27:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:27:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 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 [2021-12-06 19:27:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:46,201 INFO L225 Difference]: With dead ends: 33737 [2021-12-06 19:27:46,201 INFO L226 Difference]: Without dead ends: 28759 [2021-12-06 19:27:46,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:27:46,209 INFO L933 BasicCegarLoop]: 1266 mSDtfsCounter, 5025 mSDsluCounter, 8614 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5025 SdHoareTripleChecker+Valid, 9880 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:46,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5025 Valid, 9880 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:27:46,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28759 states. [2021-12-06 19:27:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28759 to 10303. [2021-12-06 19:27:46,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10303 states, 10302 states have (on average 1.692195690157251) internal successors, (17433), 10302 states have internal predecessors, (17433), 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) [2021-12-06 19:27:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10303 states to 10303 states and 17433 transitions. [2021-12-06 19:27:46,675 INFO L78 Accepts]: Start accepts. Automaton has 10303 states and 17433 transitions. Word has length 217 [2021-12-06 19:27:46,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:46,676 INFO L470 AbstractCegarLoop]: Abstraction has 10303 states and 17433 transitions. [2021-12-06 19:27:46,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 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) [2021-12-06 19:27:46,676 INFO L276 IsEmpty]: Start isEmpty. Operand 10303 states and 17433 transitions. [2021-12-06 19:27:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-06 19:27:46,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:46,685 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:46,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:27:46,685 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:46,686 INFO L85 PathProgramCache]: Analyzing trace with hash 489515435, now seen corresponding path program 1 times [2021-12-06 19:27:46,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:46,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950447623] [2021-12-06 19:27:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:46,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:46,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:46,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950447623] [2021-12-06 19:27:46,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950447623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:46,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:46,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:27:46,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339062393] [2021-12-06 19:27:46,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:46,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:27:46,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:46,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:27:46,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:27:46,816 INFO L87 Difference]: Start difference. First operand 10303 states and 17433 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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) [2021-12-06 19:27:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:47,103 INFO L93 Difference]: Finished difference Result 30237 states and 51251 transitions. [2021-12-06 19:27:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:27:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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 218 [2021-12-06 19:27:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:47,134 INFO L225 Difference]: With dead ends: 30237 [2021-12-06 19:27:47,134 INFO L226 Difference]: Without dead ends: 20465 [2021-12-06 19:27:47,147 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:27:47,147 INFO L933 BasicCegarLoop]: 1273 mSDtfsCounter, 961 mSDsluCounter, 2807 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 4080 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:47,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 4080 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:27:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20465 states. [2021-12-06 19:27:47,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20465 to 15351. [2021-12-06 19:27:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15351 states, 15350 states have (on average 1.6922475570032574) internal successors, (25976), 15350 states have internal predecessors, (25976), 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) [2021-12-06 19:27:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15351 states to 15351 states and 25976 transitions. [2021-12-06 19:27:47,507 INFO L78 Accepts]: Start accepts. Automaton has 15351 states and 25976 transitions. Word has length 218 [2021-12-06 19:27:47,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:47,507 INFO L470 AbstractCegarLoop]: Abstraction has 15351 states and 25976 transitions. [2021-12-06 19:27:47,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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) [2021-12-06 19:27:47,508 INFO L276 IsEmpty]: Start isEmpty. Operand 15351 states and 25976 transitions. [2021-12-06 19:27:47,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-06 19:27:47,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:47,516 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:47,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:27:47,516 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash 192701581, now seen corresponding path program 1 times [2021-12-06 19:27:47,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:47,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073346029] [2021-12-06 19:27:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:47,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:47,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:47,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073346029] [2021-12-06 19:27:47,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073346029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:47,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:47,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:27:47,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261575680] [2021-12-06 19:27:47,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:47,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:27:47,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:47,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:27:47,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:27:47,605 INFO L87 Difference]: Start difference. First operand 15351 states and 25976 transitions. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 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) [2021-12-06 19:27:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:47,972 INFO L93 Difference]: Finished difference Result 45311 states and 76711 transitions. [2021-12-06 19:27:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:27:47,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 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 [2021-12-06 19:27:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:48,016 INFO L225 Difference]: With dead ends: 45311 [2021-12-06 19:27:48,016 INFO L226 Difference]: Without dead ends: 30491 [2021-12-06 19:27:48,032 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:27:48,033 INFO L933 BasicCegarLoop]: 1272 mSDtfsCounter, 959 mSDsluCounter, 2809 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 4081 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:48,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 4081 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:27:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30491 states. [2021-12-06 19:27:48,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30491 to 22873. [2021-12-06 19:27:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22873 states, 22872 states have (on average 1.6896642182581323) internal successors, (38646), 22872 states have internal predecessors, (38646), 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) [2021-12-06 19:27:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22873 states to 22873 states and 38646 transitions. [2021-12-06 19:27:48,455 INFO L78 Accepts]: Start accepts. Automaton has 22873 states and 38646 transitions. Word has length 219 [2021-12-06 19:27:48,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:48,456 INFO L470 AbstractCegarLoop]: Abstraction has 22873 states and 38646 transitions. [2021-12-06 19:27:48,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 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) [2021-12-06 19:27:48,456 INFO L276 IsEmpty]: Start isEmpty. Operand 22873 states and 38646 transitions. [2021-12-06 19:27:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-06 19:27:48,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:48,464 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:48,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 19:27:48,464 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:48,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:48,464 INFO L85 PathProgramCache]: Analyzing trace with hash -249588958, now seen corresponding path program 1 times [2021-12-06 19:27:48,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:48,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252751986] [2021-12-06 19:27:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:48,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:48,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:48,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252751986] [2021-12-06 19:27:48,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252751986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:48,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:48,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:27:48,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724605605] [2021-12-06 19:27:48,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:48,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:27:48,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:48,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:27:48,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:27:48,539 INFO L87 Difference]: Start difference. First operand 22873 states and 38646 transitions. Second operand has 4 states, 4 states have (on average 55.0) 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) [2021-12-06 19:27:49,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:49,064 INFO L93 Difference]: Finished difference Result 67859 states and 114763 transitions. [2021-12-06 19:27:49,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:27:49,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) 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 [2021-12-06 19:27:49,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:49,126 INFO L225 Difference]: With dead ends: 67859 [2021-12-06 19:27:49,126 INFO L226 Difference]: Without dead ends: 45517 [2021-12-06 19:27:49,151 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:27:49,151 INFO L933 BasicCegarLoop]: 1272 mSDtfsCounter, 957 mSDsluCounter, 2811 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 4083 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:49,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 4083 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:27:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45517 states. [2021-12-06 19:27:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45517 to 34125. [2021-12-06 19:27:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34125 states, 34124 states have (on average 1.687492673777986) internal successors, (57584), 34124 states have internal predecessors, (57584), 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) [2021-12-06 19:27:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34125 states to 34125 states and 57584 transitions. [2021-12-06 19:27:49,809 INFO L78 Accepts]: Start accepts. Automaton has 34125 states and 57584 transitions. Word has length 220 [2021-12-06 19:27:49,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:49,809 INFO L470 AbstractCegarLoop]: Abstraction has 34125 states and 57584 transitions. [2021-12-06 19:27:49,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) 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) [2021-12-06 19:27:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 34125 states and 57584 transitions. [2021-12-06 19:27:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-06 19:27:49,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:49,818 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:49,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 19:27:49,818 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:49,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:49,818 INFO L85 PathProgramCache]: Analyzing trace with hash -906689436, now seen corresponding path program 1 times [2021-12-06 19:27:49,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:49,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505879704] [2021-12-06 19:27:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:49,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:49,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:49,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505879704] [2021-12-06 19:27:49,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505879704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:49,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:49,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:27:49,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443978323] [2021-12-06 19:27:49,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:49,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:27:49,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:49,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:27:49,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:27:49,890 INFO L87 Difference]: Start difference. First operand 34125 states and 57584 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 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) [2021-12-06 19:27:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:50,462 INFO L93 Difference]: Finished difference Result 101399 states and 171319 transitions. [2021-12-06 19:27:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:27:50,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 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 [2021-12-06 19:27:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:50,534 INFO L225 Difference]: With dead ends: 101399 [2021-12-06 19:27:50,534 INFO L226 Difference]: Without dead ends: 67805 [2021-12-06 19:27:50,560 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:27:50,561 INFO L933 BasicCegarLoop]: 1272 mSDtfsCounter, 955 mSDsluCounter, 2813 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 4085 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:50,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [955 Valid, 4085 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:27:50,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67805 states. [2021-12-06 19:27:51,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67805 to 50863. [2021-12-06 19:27:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50863 states, 50862 states have (on average 1.6856199127049665) internal successors, (85734), 50862 states have internal predecessors, (85734), 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) [2021-12-06 19:27:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50863 states to 50863 states and 85734 transitions. [2021-12-06 19:27:51,645 INFO L78 Accepts]: Start accepts. Automaton has 50863 states and 85734 transitions. Word has length 221 [2021-12-06 19:27:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:51,646 INFO L470 AbstractCegarLoop]: Abstraction has 50863 states and 85734 transitions. [2021-12-06 19:27:51,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 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) [2021-12-06 19:27:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 50863 states and 85734 transitions. [2021-12-06 19:27:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-06 19:27:51,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:51,657 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:51,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 19:27:51,657 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:51,658 INFO L85 PathProgramCache]: Analyzing trace with hash 880345225, now seen corresponding path program 1 times [2021-12-06 19:27:51,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:51,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59501945] [2021-12-06 19:27:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:51,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:51,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:51,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59501945] [2021-12-06 19:27:51,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59501945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:51,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:51,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:27:51,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412047096] [2021-12-06 19:27:51,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:51,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:27:51,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:51,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:27:51,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:27:51,737 INFO L87 Difference]: Start difference. First operand 50863 states and 85734 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) 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) [2021-12-06 19:27:52,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:52,466 INFO L93 Difference]: Finished difference Result 103167 states and 173697 transitions. [2021-12-06 19:27:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:27:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) 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 [2021-12-06 19:27:52,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:52,542 INFO L225 Difference]: With dead ends: 103167 [2021-12-06 19:27:52,543 INFO L226 Difference]: Without dead ends: 75641 [2021-12-06 19:27:52,565 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:27:52,565 INFO L933 BasicCegarLoop]: 1323 mSDtfsCounter, 270 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:52,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 2558 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:27:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75641 states. [2021-12-06 19:27:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75641 to 75639. [2021-12-06 19:27:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75639 states, 75638 states have (on average 1.6778471138845554) internal successors, (126909), 75638 states have internal predecessors, (126909), 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) [2021-12-06 19:27:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75639 states to 75639 states and 126909 transitions. [2021-12-06 19:27:53,774 INFO L78 Accepts]: Start accepts. Automaton has 75639 states and 126909 transitions. Word has length 221 [2021-12-06 19:27:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:53,774 INFO L470 AbstractCegarLoop]: Abstraction has 75639 states and 126909 transitions. [2021-12-06 19:27:53,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) 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) [2021-12-06 19:27:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 75639 states and 126909 transitions. [2021-12-06 19:27:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-06 19:27:53,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:53,781 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:53,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 19:27:53,782 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:53,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:53,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1223508087, now seen corresponding path program 1 times [2021-12-06 19:27:53,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:53,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887830106] [2021-12-06 19:27:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:53,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:53,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:53,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887830106] [2021-12-06 19:27:53,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887830106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:53,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:53,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:27:53,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581076780] [2021-12-06 19:27:53,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:53,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:27:53,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:53,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:27:53,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:27:53,847 INFO L87 Difference]: Start difference. First operand 75639 states and 126909 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) 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) [2021-12-06 19:27:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:54,897 INFO L93 Difference]: Finished difference Result 165761 states and 278415 transitions. [2021-12-06 19:27:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:27:54,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) 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 [2021-12-06 19:27:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:55,033 INFO L225 Difference]: With dead ends: 165761 [2021-12-06 19:27:55,034 INFO L226 Difference]: Without dead ends: 114823 [2021-12-06 19:27:55,072 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:27:55,073 INFO L933 BasicCegarLoop]: 1379 mSDtfsCounter, 278 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:55,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 2613 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:27:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114823 states. [2021-12-06 19:27:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114823 to 114821. [2021-12-06 19:27:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114821 states, 114820 states have (on average 1.6743337397665912) internal successors, (192247), 114820 states have internal predecessors, (192247), 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) [2021-12-06 19:27:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114821 states to 114821 states and 192247 transitions. [2021-12-06 19:27:57,338 INFO L78 Accepts]: Start accepts. Automaton has 114821 states and 192247 transitions. Word has length 221 [2021-12-06 19:27:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:27:57,338 INFO L470 AbstractCegarLoop]: Abstraction has 114821 states and 192247 transitions. [2021-12-06 19:27:57,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) 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) [2021-12-06 19:27:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 114821 states and 192247 transitions. [2021-12-06 19:27:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-06 19:27:57,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:27:57,343 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:27:57,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 19:27:57,344 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:27:57,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:27:57,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1619165559, now seen corresponding path program 1 times [2021-12-06 19:27:57,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:27:57,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944506497] [2021-12-06 19:27:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:27:57,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:27:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:27:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:27:57,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:27:57,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944506497] [2021-12-06 19:27:57,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944506497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:27:57,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:27:57,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:27:57,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414683820] [2021-12-06 19:27:57,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:27:57,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:27:57,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:27:57,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:27:57,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:27:57,407 INFO L87 Difference]: Start difference. First operand 114821 states and 192247 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) 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) [2021-12-06 19:27:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:27:59,171 INFO L93 Difference]: Finished difference Result 253775 states and 425037 transitions. [2021-12-06 19:27:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:27:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) 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 [2021-12-06 19:27:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:27:59,411 INFO L225 Difference]: With dead ends: 253775 [2021-12-06 19:27:59,411 INFO L226 Difference]: Without dead ends: 175061 [2021-12-06 19:27:59,485 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:27:59,485 INFO L933 BasicCegarLoop]: 1436 mSDtfsCounter, 286 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 2669 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:27:59,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 2669 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:27:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175061 states. [2021-12-06 19:28:02,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175061 to 175059. [2021-12-06 19:28:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175059 states, 175058 states have (on average 1.6687669229626751) internal successors, (292131), 175058 states have internal predecessors, (292131), 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) [2021-12-06 19:28:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175059 states to 175059 states and 292131 transitions. [2021-12-06 19:28:02,497 INFO L78 Accepts]: Start accepts. Automaton has 175059 states and 292131 transitions. Word has length 221 [2021-12-06 19:28:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:28:02,497 INFO L470 AbstractCegarLoop]: Abstraction has 175059 states and 292131 transitions. [2021-12-06 19:28:02,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) 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) [2021-12-06 19:28:02,497 INFO L276 IsEmpty]: Start isEmpty. Operand 175059 states and 292131 transitions. [2021-12-06 19:28:02,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-06 19:28:02,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:28:02,500 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:28:02,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 19:28:02,500 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:28:02,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:28:02,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1934017143, now seen corresponding path program 1 times [2021-12-06 19:28:02,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:28:02,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482922335] [2021-12-06 19:28:02,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:28:02,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:28:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:28:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:28:02,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:28:02,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482922335] [2021-12-06 19:28:02,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482922335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:28:02,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:28:02,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:28:02,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131653972] [2021-12-06 19:28:02,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:28:02,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:28:02,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:28:02,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:28:02,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:28:02,571 INFO L87 Difference]: Start difference. First operand 175059 states and 292131 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) 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) [2021-12-06 19:28:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:28:05,867 INFO L93 Difference]: Finished difference Result 387775 states and 647033 transitions. [2021-12-06 19:28:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:28:05,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) 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 [2021-12-06 19:28:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:28:06,313 INFO L225 Difference]: With dead ends: 387775 [2021-12-06 19:28:06,313 INFO L226 Difference]: Without dead ends: 267039 [2021-12-06 19:28:06,361 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:28:06,362 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 294 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 2725 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:28:06,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 2725 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:28:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267039 states. [2021-12-06 19:28:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267039 to 267037. [2021-12-06 19:28:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267037 states, 267036 states have (on average 1.6614576311808145) internal successors, (443669), 267036 states have internal predecessors, (443669), 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) [2021-12-06 19:28:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267037 states to 267037 states and 443669 transitions. [2021-12-06 19:28:11,130 INFO L78 Accepts]: Start accepts. Automaton has 267037 states and 443669 transitions. Word has length 221 [2021-12-06 19:28:11,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:28:11,131 INFO L470 AbstractCegarLoop]: Abstraction has 267037 states and 443669 transitions. [2021-12-06 19:28:11,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) 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) [2021-12-06 19:28:11,131 INFO L276 IsEmpty]: Start isEmpty. Operand 267037 states and 443669 transitions. [2021-12-06 19:28:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-06 19:28:11,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:28:11,133 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:28:11,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 19:28:11,133 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:28:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:28:11,133 INFO L85 PathProgramCache]: Analyzing trace with hash 499514505, now seen corresponding path program 1 times [2021-12-06 19:28:11,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:28:11,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106736749] [2021-12-06 19:28:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:28:11,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:28:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:28:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:28:11,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:28:11,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106736749] [2021-12-06 19:28:11,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106736749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:28:11,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:28:11,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:28:11,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404906521] [2021-12-06 19:28:11,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:28:11,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:28:11,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:28:11,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:28:11,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:28:11,201 INFO L87 Difference]: Start difference. First operand 267037 states and 443669 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) 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) [2021-12-06 19:28:15,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:28:15,984 INFO L93 Difference]: Finished difference Result 593762 states and 989373 transitions. [2021-12-06 19:28:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:28:15,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) 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 [2021-12-06 19:28:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:28:16,648 INFO L225 Difference]: With dead ends: 593762 [2021-12-06 19:28:16,648 INFO L226 Difference]: Without dead ends: 406991 [2021-12-06 19:28:16,736 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:28:16,736 INFO L933 BasicCegarLoop]: 1542 mSDtfsCounter, 302 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 2773 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:28:16,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 2773 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:28:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406991 states. [2021-12-06 19:28:23,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406991 to 406989. [2021-12-06 19:28:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406989 states, 406988 states have (on average 1.6565721839464553) internal successors, (674205), 406988 states have internal predecessors, (674205), 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) [2021-12-06 19:28:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406989 states to 406989 states and 674205 transitions. [2021-12-06 19:28:24,955 INFO L78 Accepts]: Start accepts. Automaton has 406989 states and 674205 transitions. Word has length 221 [2021-12-06 19:28:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:28:24,955 INFO L470 AbstractCegarLoop]: Abstraction has 406989 states and 674205 transitions. [2021-12-06 19:28:24,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) 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) [2021-12-06 19:28:24,956 INFO L276 IsEmpty]: Start isEmpty. Operand 406989 states and 674205 transitions. [2021-12-06 19:28:24,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-06 19:28:24,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:28:24,957 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:28:24,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 19:28:24,957 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:28:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:28:24,958 INFO L85 PathProgramCache]: Analyzing trace with hash 367036569, now seen corresponding path program 1 times [2021-12-06 19:28:24,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:28:24,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368789411] [2021-12-06 19:28:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:28:24,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:28:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:28:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:28:25,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:28:25,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368789411] [2021-12-06 19:28:25,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368789411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:28:25,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:28:25,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:28:25,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547481159] [2021-12-06 19:28:25,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:28:25,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:28:25,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:28:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:28:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:28:25,198 INFO L87 Difference]: Start difference. First operand 406989 states and 674205 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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) [2021-12-06 19:28:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:28:36,812 INFO L93 Difference]: Finished difference Result 1326837 states and 2200457 transitions. [2021-12-06 19:28:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:28:36,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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 222 [2021-12-06 19:28:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:28:38,545 INFO L225 Difference]: With dead ends: 1326837 [2021-12-06 19:28:38,545 INFO L226 Difference]: Without dead ends: 920461 [2021-12-06 19:28:38,736 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:28:38,736 INFO L933 BasicCegarLoop]: 1277 mSDtfsCounter, 953 mSDsluCounter, 2815 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 4092 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:28:38,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [953 Valid, 4092 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:28:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920461 states. [2021-12-06 19:28:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920461 to 662554. [2021-12-06 19:28:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662554 states, 662553 states have (on average 1.652581755723693) internal successors, (1094923), 662553 states have internal predecessors, (1094923), 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) [2021-12-06 19:28:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662554 states to 662554 states and 1094923 transitions. [2021-12-06 19:28:53,990 INFO L78 Accepts]: Start accepts. Automaton has 662554 states and 1094923 transitions. Word has length 222 [2021-12-06 19:28:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:28:53,990 INFO L470 AbstractCegarLoop]: Abstraction has 662554 states and 1094923 transitions. [2021-12-06 19:28:53,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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) [2021-12-06 19:28:53,990 INFO L276 IsEmpty]: Start isEmpty. Operand 662554 states and 1094923 transitions. [2021-12-06 19:28:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-06 19:28:53,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:28:53,992 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:28:53,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 19:28:53,992 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:28:53,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:28:53,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1769913903, now seen corresponding path program 1 times [2021-12-06 19:28:53,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:28:53,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967812773] [2021-12-06 19:28:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:28:53,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:28:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:28:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:28:54,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:28:54,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967812773] [2021-12-06 19:28:54,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967812773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:28:54,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:28:54,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:28:54,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566753757] [2021-12-06 19:28:54,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:28:54,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:28:54,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:28:54,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:28:54,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:28:54,186 INFO L87 Difference]: Start difference. First operand 662554 states and 1094923 transitions. Second operand has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 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) [2021-12-06 19:29:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:04,511 INFO L93 Difference]: Finished difference Result 1324497 states and 2188766 transitions. [2021-12-06 19:29:04,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:29:04,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 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 224 [2021-12-06 19:29:04,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:05,537 INFO L225 Difference]: With dead ends: 1324497 [2021-12-06 19:29:05,538 INFO L226 Difference]: Without dead ends: 662556 [2021-12-06 19:29:05,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:29:05,796 INFO L933 BasicCegarLoop]: 1279 mSDtfsCounter, 1374 mSDsluCounter, 4936 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1374 SdHoareTripleChecker+Valid, 6215 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:05,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1374 Valid, 6215 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:29:06,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662556 states. [2021-12-06 19:29:17,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662556 to 662554. [2021-12-06 19:29:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662554 states, 662553 states have (on average 1.6478651519199219) internal successors, (1091798), 662553 states have internal predecessors, (1091798), 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) [2021-12-06 19:29:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662554 states to 662554 states and 1091798 transitions. [2021-12-06 19:29:19,863 INFO L78 Accepts]: Start accepts. Automaton has 662554 states and 1091798 transitions. Word has length 224 [2021-12-06 19:29:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:29:19,864 INFO L470 AbstractCegarLoop]: Abstraction has 662554 states and 1091798 transitions. [2021-12-06 19:29:19,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 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) [2021-12-06 19:29:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 662554 states and 1091798 transitions. [2021-12-06 19:29:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-06 19:29:19,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:29:19,865 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:29:19,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 19:29:19,866 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:29:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1987911353, now seen corresponding path program 1 times [2021-12-06 19:29:19,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:19,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872079826] [2021-12-06 19:29:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:19,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:29:20,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:20,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872079826] [2021-12-06 19:29:20,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872079826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:29:20,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:29:20,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:29:20,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378457776] [2021-12-06 19:29:20,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:29:20,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:29:20,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:20,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:29:20,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:29:20,003 INFO L87 Difference]: Start difference. First operand 662554 states and 1091798 transitions. Second operand has 7 states, 7 states have (on average 32.42857142857143) internal successors, (227), 7 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) [2021-12-06 19:29:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:38,461 INFO L93 Difference]: Finished difference Result 1958757 states and 3229272 transitions. [2021-12-06 19:29:38,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:29:38,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.42857142857143) internal successors, (227), 7 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 [2021-12-06 19:29:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:29:40,660 INFO L225 Difference]: With dead ends: 1958757 [2021-12-06 19:29:40,661 INFO L226 Difference]: Without dead ends: 1296816 [2021-12-06 19:29:40,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:29:40,960 INFO L933 BasicCegarLoop]: 1265 mSDtfsCounter, 1630 mSDsluCounter, 4964 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1630 SdHoareTripleChecker+Valid, 6229 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:29:40,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1630 Valid, 6229 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:29:42,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296816 states. [2021-12-06 19:30:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296816 to 1296814. [2021-12-06 19:30:06,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296814 states, 1296813 states have (on average 1.6411410126209407) internal successors, (2128253), 1296813 states have internal predecessors, (2128253), 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) [2021-12-06 19:30:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296814 states to 1296814 states and 2128253 transitions. [2021-12-06 19:30:09,507 INFO L78 Accepts]: Start accepts. Automaton has 1296814 states and 2128253 transitions. Word has length 227 [2021-12-06 19:30:09,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:09,507 INFO L470 AbstractCegarLoop]: Abstraction has 1296814 states and 2128253 transitions. [2021-12-06 19:30:09,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.42857142857143) internal successors, (227), 7 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) [2021-12-06 19:30:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1296814 states and 2128253 transitions. [2021-12-06 19:30:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-06 19:30:09,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:09,509 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:30:09,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 19:30:09,510 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:30:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:09,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1929823494, now seen corresponding path program 1 times [2021-12-06 19:30:09,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:30:09,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338987039] [2021-12-06 19:30:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:09,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:30:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:30:09,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:30:09,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338987039] [2021-12-06 19:30:09,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338987039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:30:09,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:30:09,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 19:30:09,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432592670] [2021-12-06 19:30:09,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:30:09,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:30:09,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:30:09,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:30:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:30:09,736 INFO L87 Difference]: Start difference. First operand 1296814 states and 2128253 transitions. Second operand has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 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) [2021-12-06 19:30:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:50,315 INFO L93 Difference]: Finished difference Result 2484257 states and 4052446 transitions. [2021-12-06 19:30:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:30:50,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 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 228 [2021-12-06 19:30:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:54,624 INFO L225 Difference]: With dead ends: 2484257 [2021-12-06 19:30:54,624 INFO L226 Difference]: Without dead ends: 2484255 [2021-12-06 19:30:55,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:30:55,173 INFO L933 BasicCegarLoop]: 1460 mSDtfsCounter, 2364 mSDsluCounter, 6674 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 8134 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:55,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2364 Valid, 8134 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:30:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484255 states.