./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL --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 64affc32c9ee6b1616cdbc82208fa978b35ea8d8fb3017d6636bda9ef421e017 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:00:51,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:00:51,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:00:51,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:00:51,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:00:51,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:00:51,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:00:51,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:00:51,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:00:51,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:00:51,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:00:51,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:00:51,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:00:51,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:00:51,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:00:51,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:00:51,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:00:51,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:00:51,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:00:51,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:00:51,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:00:51,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:00:51,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:00:51,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:00:51,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:00:51,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:00:51,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:00:51,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:00:51,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:00:51,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:00:51,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:00:51,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:00:51,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:00:51,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:00:51,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:00:51,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:00:51,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:00:51,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:00:51,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:00:51,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:00:51,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:00:51,939 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:00:51,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:00:51,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:00:51,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:00:51,981 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:00:51,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:00:51,982 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:00:51,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:00:51,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:00:51,984 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:00:51,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:00:51,985 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:00:51,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:00:51,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:00:51,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:00:51,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:00:51,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:00:51,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:00:51,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:00:51,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:00:51,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:00:51,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:00:51,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:00:51,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:00:51,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:00:51,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:00:51,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:00:51,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:00:51,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:00:51,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:00:51,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:00:51,992 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:00:51,992 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:00:51,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:00:51,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:00:51,993 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_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64affc32c9ee6b1616cdbc82208fa978b35ea8d8fb3017d6636bda9ef421e017 [2021-11-19 05:00:52,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:00:52,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:00:52,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:00:52,527 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:00:52,528 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:00:52,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c [2021-11-19 05:00:52,642 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/data/3a76f84a3/6944325a6ce442d49d6c82d7aee837a2/FLAG72f94c547 [2021-11-19 05:00:53,715 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:00:53,717 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c [2021-11-19 05:00:53,766 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/data/3a76f84a3/6944325a6ce442d49d6c82d7aee837a2/FLAG72f94c547 [2021-11-19 05:00:54,258 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/data/3a76f84a3/6944325a6ce442d49d6c82d7aee837a2 [2021-11-19 05:00:54,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:00:54,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:00:54,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:00:54,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:00:54,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:00:54,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:00:54" (1/1) ... [2021-11-19 05:00:54,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aea3d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:54, skipping insertion in model container [2021-11-19 05:00:54,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:00:54" (1/1) ... [2021-11-19 05:00:54,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:00:54,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:00:55,084 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_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c[75436,75449] [2021-11-19 05:00:55,098 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:00:55,119 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:00:55,431 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_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c[75436,75449] [2021-11-19 05:00:55,436 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:00:55,465 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:00:55,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:55 WrapperNode [2021-11-19 05:00:55,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:00:55,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:00:55,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:00:55,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:00:55,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:55" (1/1) ... [2021-11-19 05:00:55,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:55" (1/1) ... [2021-11-19 05:00:55,632 INFO L137 Inliner]: procedures = 32, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 797 [2021-11-19 05:00:55,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:00:55,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:00:55,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:00:55,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:00:55,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:55" (1/1) ... [2021-11-19 05:00:55,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:55" (1/1) ... [2021-11-19 05:00:55,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:55" (1/1) ... [2021-11-19 05:00:55,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:55" (1/1) ... [2021-11-19 05:00:55,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:55" (1/1) ... [2021-11-19 05:00:55,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:55" (1/1) ... [2021-11-19 05:00:55,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:55" (1/1) ... [2021-11-19 05:00:55,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:00:55,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:00:55,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:00:55,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:00:55,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:55" (1/1) ... [2021-11-19 05:00:55,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:00:55,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:00:55,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:00:55,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:00:55,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:00:55,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 05:00:55,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:00:55,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:00:55,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:00:55,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 05:00:55,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:00:55,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 05:00:55,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:00:55,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:00:56,228 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:00:56,230 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:00:56,280 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 05:00:58,910 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 05:00:58,911 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 05:00:58,911 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:00:58,923 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:00:58,924 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 05:00:58,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:00:58 BoogieIcfgContainer [2021-11-19 05:00:58,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:00:58,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:00:58,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:00:58,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:00:58,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:00:54" (1/3) ... [2021-11-19 05:00:58,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eeed548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:00:58, skipping insertion in model container [2021-11-19 05:00:58,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:55" (2/3) ... [2021-11-19 05:00:58,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eeed548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:00:58, skipping insertion in model container [2021-11-19 05:00:58,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:00:58" (3/3) ... [2021-11-19 05:00:58,939 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.12.i.cil-2.c [2021-11-19 05:00:58,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:00:58,948 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:00:59,027 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:00:59,038 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 [2021-11-19 05:00:59,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:00:59,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 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) [2021-11-19 05:00:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 05:00:59,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:00:59,117 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] [2021-11-19 05:00:59,118 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:00:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:00:59,126 INFO L85 PathProgramCache]: Analyzing trace with hash 918515972, now seen corresponding path program 1 times [2021-11-19 05:00:59,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:00:59,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528406340] [2021-11-19 05:00:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:00:59,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:00:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:00:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:00:59,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:00:59,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528406340] [2021-11-19 05:00:59,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528406340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:00:59,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:00:59,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:00:59,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957794966] [2021-11-19 05:00:59,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:00:59,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:00:59,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:00:59,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:00:59,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:00:59,895 INFO L87 Difference]: Start difference. First operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-19 05:01:01,373 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:02,169 INFO L93 Difference]: Finished difference Result 331 states and 562 transitions. [2021-11-19 05:01:02,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:02,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 44 [2021-11-19 05:01:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:02,193 INFO L225 Difference]: With dead ends: 331 [2021-11-19 05:01:02,193 INFO L226 Difference]: Without dead ends: 168 [2021-11-19 05:01:02,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:02,207 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 36 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:02,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 603 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 05:01:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-19 05:01:02,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2021-11-19 05:01:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 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) [2021-11-19 05:01:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2021-11-19 05:01:02,279 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 44 [2021-11-19 05:01:02,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:02,280 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2021-11-19 05:01:02,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-19 05:01:02,281 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2021-11-19 05:01:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 05:01:02,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:02,286 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:02,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:01:02,287 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:02,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1817458693, now seen corresponding path program 1 times [2021-11-19 05:01:02,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:02,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640649256] [2021-11-19 05:01:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:02,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:02,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:02,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640649256] [2021-11-19 05:01:02,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640649256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:02,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:02,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:02,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067075442] [2021-11-19 05:01:02,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:02,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:02,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:02,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:02,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:02,578 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2021-11-19 05:01:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:04,023 INFO L93 Difference]: Finished difference Result 298 states and 458 transitions. [2021-11-19 05:01:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:04,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2021-11-19 05:01:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:04,027 INFO L225 Difference]: With dead ends: 298 [2021-11-19 05:01:04,027 INFO L226 Difference]: Without dead ends: 168 [2021-11-19 05:01:04,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:04,031 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 24 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:04,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 489 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 05:01:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-19 05:01:04,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2021-11-19 05:01:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.56) internal successors, (234), 150 states have internal predecessors, (234), 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) [2021-11-19 05:01:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 234 transitions. [2021-11-19 05:01:04,070 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 234 transitions. Word has length 57 [2021-11-19 05:01:04,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:04,071 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 234 transitions. [2021-11-19 05:01:04,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2021-11-19 05:01:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 234 transitions. [2021-11-19 05:01:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 05:01:04,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:04,076 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:04,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:01:04,080 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:04,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1591530452, now seen corresponding path program 1 times [2021-11-19 05:01:04,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:04,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410340019] [2021-11-19 05:01:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:04,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:04,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:04,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410340019] [2021-11-19 05:01:04,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410340019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:04,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:04,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:04,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250439745] [2021-11-19 05:01:04,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:04,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:04,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:04,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:04,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:04,298 INFO L87 Difference]: Start difference. First operand 151 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-19 05:01:06,310 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:06,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:06,833 INFO L93 Difference]: Finished difference Result 297 states and 456 transitions. [2021-11-19 05:01:06,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:06,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-11-19 05:01:06,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:06,838 INFO L225 Difference]: With dead ends: 297 [2021-11-19 05:01:06,838 INFO L226 Difference]: Without dead ends: 167 [2021-11-19 05:01:06,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:06,841 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 28 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:06,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 491 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:01:06,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-19 05:01:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2021-11-19 05:01:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5533333333333332) internal successors, (233), 150 states have internal predecessors, (233), 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) [2021-11-19 05:01:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 233 transitions. [2021-11-19 05:01:06,862 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 233 transitions. Word has length 58 [2021-11-19 05:01:06,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:06,863 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 233 transitions. [2021-11-19 05:01:06,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-19 05:01:06,864 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 233 transitions. [2021-11-19 05:01:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 05:01:06,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:06,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:06,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 05:01:06,868 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:06,869 INFO L85 PathProgramCache]: Analyzing trace with hash 544019648, now seen corresponding path program 1 times [2021-11-19 05:01:06,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:06,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758316735] [2021-11-19 05:01:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:06,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:07,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:07,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758316735] [2021-11-19 05:01:07,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758316735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:07,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:07,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:07,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320911617] [2021-11-19 05:01:07,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:07,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:07,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:07,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:07,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:07,047 INFO L87 Difference]: Start difference. First operand 151 states and 233 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-19 05:01:09,062 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:09,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:09,569 INFO L93 Difference]: Finished difference Result 297 states and 455 transitions. [2021-11-19 05:01:09,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:09,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-11-19 05:01:09,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:09,571 INFO L225 Difference]: With dead ends: 297 [2021-11-19 05:01:09,572 INFO L226 Difference]: Without dead ends: 167 [2021-11-19 05:01:09,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:09,575 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 26 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:09,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 491 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:01:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-19 05:01:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2021-11-19 05:01:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5466666666666666) internal successors, (232), 150 states have internal predecessors, (232), 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) [2021-11-19 05:01:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 232 transitions. [2021-11-19 05:01:09,614 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 232 transitions. Word has length 58 [2021-11-19 05:01:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:09,615 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 232 transitions. [2021-11-19 05:01:09,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-19 05:01:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 232 transitions. [2021-11-19 05:01:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 05:01:09,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:09,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:09,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 05:01:09,630 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash -591846647, now seen corresponding path program 1 times [2021-11-19 05:01:09,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:09,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891801632] [2021-11-19 05:01:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:09,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:09,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:09,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891801632] [2021-11-19 05:01:09,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891801632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:09,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:09,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:09,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875237561] [2021-11-19 05:01:09,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:09,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:09,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:09,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:09,822 INFO L87 Difference]: Start difference. First operand 151 states and 232 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-19 05:01:11,834 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:12,370 INFO L93 Difference]: Finished difference Result 296 states and 453 transitions. [2021-11-19 05:01:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:12,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-11-19 05:01:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:12,373 INFO L225 Difference]: With dead ends: 296 [2021-11-19 05:01:12,374 INFO L226 Difference]: Without dead ends: 166 [2021-11-19 05:01:12,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:12,376 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 19 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:12,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 493 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:01:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-19 05:01:12,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 151. [2021-11-19 05:01:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.54) internal successors, (231), 150 states have internal predecessors, (231), 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) [2021-11-19 05:01:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 231 transitions. [2021-11-19 05:01:12,389 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 231 transitions. Word has length 58 [2021-11-19 05:01:12,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:12,390 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 231 transitions. [2021-11-19 05:01:12,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-19 05:01:12,390 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 231 transitions. [2021-11-19 05:01:12,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 05:01:12,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:12,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:12,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 05:01:12,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:12,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:12,393 INFO L85 PathProgramCache]: Analyzing trace with hash 729006665, now seen corresponding path program 1 times [2021-11-19 05:01:12,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:12,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185344652] [2021-11-19 05:01:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:12,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:12,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:12,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185344652] [2021-11-19 05:01:12,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185344652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:12,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:12,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:12,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733814615] [2021-11-19 05:01:12,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:12,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:12,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:12,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:12,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:12,500 INFO L87 Difference]: Start difference. First operand 151 states and 231 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-19 05:01:13,911 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:14,333 INFO L93 Difference]: Finished difference Result 294 states and 450 transitions. [2021-11-19 05:01:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:14,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-11-19 05:01:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:14,337 INFO L225 Difference]: With dead ends: 294 [2021-11-19 05:01:14,337 INFO L226 Difference]: Without dead ends: 164 [2021-11-19 05:01:14,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:14,339 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 19 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:14,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 497 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 05:01:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-19 05:01:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 151. [2021-11-19 05:01:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5333333333333334) internal successors, (230), 150 states have internal predecessors, (230), 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) [2021-11-19 05:01:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 230 transitions. [2021-11-19 05:01:14,367 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 230 transitions. Word has length 58 [2021-11-19 05:01:14,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:14,368 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 230 transitions. [2021-11-19 05:01:14,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-19 05:01:14,368 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 230 transitions. [2021-11-19 05:01:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 05:01:14,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:14,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:14,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 05:01:14,370 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:14,371 INFO L85 PathProgramCache]: Analyzing trace with hash -767835076, now seen corresponding path program 1 times [2021-11-19 05:01:14,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:14,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172668492] [2021-11-19 05:01:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:14,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:14,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:14,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172668492] [2021-11-19 05:01:14,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172668492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:14,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:14,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:14,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063284331] [2021-11-19 05:01:14,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:14,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:14,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:14,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:14,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:14,518 INFO L87 Difference]: Start difference. First operand 151 states and 230 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-11-19 05:01:15,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:15,834 INFO L93 Difference]: Finished difference Result 294 states and 449 transitions. [2021-11-19 05:01:15,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:15,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 59 [2021-11-19 05:01:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:15,837 INFO L225 Difference]: With dead ends: 294 [2021-11-19 05:01:15,837 INFO L226 Difference]: Without dead ends: 164 [2021-11-19 05:01:15,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:15,839 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 22 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:15,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 497 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 05:01:15,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-19 05:01:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 151. [2021-11-19 05:01:15,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5266666666666666) internal successors, (229), 150 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:01:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 229 transitions. [2021-11-19 05:01:15,850 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 229 transitions. Word has length 59 [2021-11-19 05:01:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:15,850 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 229 transitions. [2021-11-19 05:01:15,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-11-19 05:01:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 229 transitions. [2021-11-19 05:01:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 05:01:15,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:15,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:15,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 05:01:15,853 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:15,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:15,855 INFO L85 PathProgramCache]: Analyzing trace with hash -107427749, now seen corresponding path program 1 times [2021-11-19 05:01:15,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:15,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210703132] [2021-11-19 05:01:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:15,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:15,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:15,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210703132] [2021-11-19 05:01:15,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210703132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:15,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:15,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:15,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764893498] [2021-11-19 05:01:15,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:15,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:15,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:15,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:15,954 INFO L87 Difference]: Start difference. First operand 151 states and 229 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-19 05:01:17,988 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:18,476 INFO L93 Difference]: Finished difference Result 294 states and 448 transitions. [2021-11-19 05:01:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:18,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 60 [2021-11-19 05:01:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:18,479 INFO L225 Difference]: With dead ends: 294 [2021-11-19 05:01:18,479 INFO L226 Difference]: Without dead ends: 164 [2021-11-19 05:01:18,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:18,481 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 20 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:18,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 497 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:01:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-19 05:01:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 151. [2021-11-19 05:01:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.52) internal successors, (228), 150 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) [2021-11-19 05:01:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 228 transitions. [2021-11-19 05:01:18,491 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 228 transitions. Word has length 60 [2021-11-19 05:01:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:18,491 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 228 transitions. [2021-11-19 05:01:18,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-19 05:01:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 228 transitions. [2021-11-19 05:01:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 05:01:18,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:18,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:18,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 05:01:18,494 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:18,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:18,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1563561015, now seen corresponding path program 1 times [2021-11-19 05:01:18,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:18,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949280886] [2021-11-19 05:01:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:18,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:18,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:18,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949280886] [2021-11-19 05:01:18,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949280886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:18,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:18,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:18,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557546857] [2021-11-19 05:01:18,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:18,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:18,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:18,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:18,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:18,626 INFO L87 Difference]: Start difference. First operand 151 states and 228 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-11-19 05:01:20,638 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:21,063 INFO L93 Difference]: Finished difference Result 284 states and 434 transitions. [2021-11-19 05:01:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2021-11-19 05:01:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:21,066 INFO L225 Difference]: With dead ends: 284 [2021-11-19 05:01:21,067 INFO L226 Difference]: Without dead ends: 154 [2021-11-19 05:01:21,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:21,068 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 11 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:21,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 511 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:01:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-19 05:01:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2021-11-19 05:01:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5133333333333334) internal successors, (227), 150 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) [2021-11-19 05:01:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 227 transitions. [2021-11-19 05:01:21,086 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 227 transitions. Word has length 61 [2021-11-19 05:01:21,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:21,086 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 227 transitions. [2021-11-19 05:01:21,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-11-19 05:01:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 227 transitions. [2021-11-19 05:01:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 05:01:21,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:21,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:21,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 05:01:21,089 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:21,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:21,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2058407473, now seen corresponding path program 1 times [2021-11-19 05:01:21,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:21,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039584667] [2021-11-19 05:01:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:21,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:21,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:21,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039584667] [2021-11-19 05:01:21,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039584667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:21,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:21,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:21,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092162681] [2021-11-19 05:01:21,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:21,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:21,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:21,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:21,237 INFO L87 Difference]: Start difference. First operand 151 states and 227 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-11-19 05:01:22,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:22,493 INFO L93 Difference]: Finished difference Result 324 states and 495 transitions. [2021-11-19 05:01:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:22,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2021-11-19 05:01:22,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:22,496 INFO L225 Difference]: With dead ends: 324 [2021-11-19 05:01:22,496 INFO L226 Difference]: Without dead ends: 194 [2021-11-19 05:01:22,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:22,498 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 34 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:22,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 509 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 05:01:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-19 05:01:22,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2021-11-19 05:01:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5406976744186047) internal successors, (265), 172 states have internal predecessors, (265), 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) [2021-11-19 05:01:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 265 transitions. [2021-11-19 05:01:22,511 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 265 transitions. Word has length 61 [2021-11-19 05:01:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:22,512 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 265 transitions. [2021-11-19 05:01:22,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-11-19 05:01:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 265 transitions. [2021-11-19 05:01:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 05:01:22,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:22,514 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:22,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 05:01:22,515 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:22,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:22,516 INFO L85 PathProgramCache]: Analyzing trace with hash -264546022, now seen corresponding path program 1 times [2021-11-19 05:01:22,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:22,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349988727] [2021-11-19 05:01:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:22,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:22,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:22,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349988727] [2021-11-19 05:01:22,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349988727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:22,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:22,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:22,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60031704] [2021-11-19 05:01:22,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:22,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:22,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:22,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:22,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:22,631 INFO L87 Difference]: Start difference. First operand 173 states and 265 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2021-11-19 05:01:24,641 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:25,092 INFO L93 Difference]: Finished difference Result 346 states and 532 transitions. [2021-11-19 05:01:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 74 [2021-11-19 05:01:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:25,099 INFO L225 Difference]: With dead ends: 346 [2021-11-19 05:01:25,099 INFO L226 Difference]: Without dead ends: 194 [2021-11-19 05:01:25,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:25,101 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 39 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:25,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 509 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:01:25,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-19 05:01:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2021-11-19 05:01:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 172 states have internal predecessors, (264), 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) [2021-11-19 05:01:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 264 transitions. [2021-11-19 05:01:25,115 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 264 transitions. Word has length 74 [2021-11-19 05:01:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:25,116 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 264 transitions. [2021-11-19 05:01:25,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2021-11-19 05:01:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 264 transitions. [2021-11-19 05:01:25,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 05:01:25,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:25,118 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:25,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 05:01:25,119 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1473893727, now seen corresponding path program 1 times [2021-11-19 05:01:25,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:25,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088509232] [2021-11-19 05:01:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:25,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:25,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:25,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088509232] [2021-11-19 05:01:25,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088509232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:25,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:25,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:25,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499528297] [2021-11-19 05:01:25,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:25,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:25,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:25,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:25,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:25,214 INFO L87 Difference]: Start difference. First operand 173 states and 264 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-19 05:01:27,225 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:27,675 INFO L93 Difference]: Finished difference Result 345 states and 529 transitions. [2021-11-19 05:01:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:27,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 75 [2021-11-19 05:01:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:27,678 INFO L225 Difference]: With dead ends: 345 [2021-11-19 05:01:27,679 INFO L226 Difference]: Without dead ends: 193 [2021-11-19 05:01:27,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:27,681 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 43 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:27,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 511 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:01:27,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-19 05:01:27,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 173. [2021-11-19 05:01:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5290697674418605) internal successors, (263), 172 states have internal predecessors, (263), 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) [2021-11-19 05:01:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 263 transitions. [2021-11-19 05:01:27,693 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 263 transitions. Word has length 75 [2021-11-19 05:01:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:27,694 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 263 transitions. [2021-11-19 05:01:27,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-19 05:01:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 263 transitions. [2021-11-19 05:01:27,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 05:01:27,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:27,697 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:27,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 05:01:27,697 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:27,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:27,698 INFO L85 PathProgramCache]: Analyzing trace with hash 426382923, now seen corresponding path program 1 times [2021-11-19 05:01:27,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:27,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101874179] [2021-11-19 05:01:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:27,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:27,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:27,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101874179] [2021-11-19 05:01:27,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101874179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:27,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:27,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:27,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948319817] [2021-11-19 05:01:27,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:27,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:27,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:27,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:27,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:27,799 INFO L87 Difference]: Start difference. First operand 173 states and 263 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-19 05:01:29,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:30,222 INFO L93 Difference]: Finished difference Result 345 states and 527 transitions. [2021-11-19 05:01:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:30,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 75 [2021-11-19 05:01:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:30,225 INFO L225 Difference]: With dead ends: 345 [2021-11-19 05:01:30,225 INFO L226 Difference]: Without dead ends: 193 [2021-11-19 05:01:30,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:30,226 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 41 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:30,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 511 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:01:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-19 05:01:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 173. [2021-11-19 05:01:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5232558139534884) internal successors, (262), 172 states have internal predecessors, (262), 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) [2021-11-19 05:01:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 262 transitions. [2021-11-19 05:01:30,237 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 262 transitions. Word has length 75 [2021-11-19 05:01:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:30,237 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 262 transitions. [2021-11-19 05:01:30,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-19 05:01:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 262 transitions. [2021-11-19 05:01:30,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 05:01:30,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:30,240 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:30,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 05:01:30,240 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:30,241 INFO L85 PathProgramCache]: Analyzing trace with hash -709483372, now seen corresponding path program 1 times [2021-11-19 05:01:30,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:30,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648320611] [2021-11-19 05:01:30,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:30,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:30,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:30,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648320611] [2021-11-19 05:01:30,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648320611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:30,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:30,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:30,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423421932] [2021-11-19 05:01:30,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:30,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:30,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:30,329 INFO L87 Difference]: Start difference. First operand 173 states and 262 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-19 05:01:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:31,349 INFO L93 Difference]: Finished difference Result 344 states and 524 transitions. [2021-11-19 05:01:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 75 [2021-11-19 05:01:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:31,352 INFO L225 Difference]: With dead ends: 344 [2021-11-19 05:01:31,353 INFO L226 Difference]: Without dead ends: 192 [2021-11-19 05:01:31,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:31,354 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 34 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:31,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 513 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 05:01:31,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-19 05:01:31,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2021-11-19 05:01:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5174418604651163) internal successors, (261), 172 states have internal predecessors, (261), 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) [2021-11-19 05:01:31,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 261 transitions. [2021-11-19 05:01:31,364 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 261 transitions. Word has length 75 [2021-11-19 05:01:31,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:31,364 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 261 transitions. [2021-11-19 05:01:31,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-19 05:01:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 261 transitions. [2021-11-19 05:01:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 05:01:31,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:31,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:31,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 05:01:31,367 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:31,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash 611369940, now seen corresponding path program 1 times [2021-11-19 05:01:31,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:31,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851090528] [2021-11-19 05:01:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:31,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:31,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:31,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851090528] [2021-11-19 05:01:31,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851090528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:31,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:31,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:31,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011951980] [2021-11-19 05:01:31,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:31,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:31,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:31,456 INFO L87 Difference]: Start difference. First operand 173 states and 261 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-19 05:01:33,468 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:33,849 INFO L93 Difference]: Finished difference Result 342 states and 520 transitions. [2021-11-19 05:01:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:33,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 75 [2021-11-19 05:01:33,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:33,853 INFO L225 Difference]: With dead ends: 342 [2021-11-19 05:01:33,853 INFO L226 Difference]: Without dead ends: 190 [2021-11-19 05:01:33,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:33,855 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 34 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:33,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 517 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:01:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-19 05:01:33,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2021-11-19 05:01:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5116279069767442) internal successors, (260), 172 states have internal predecessors, (260), 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) [2021-11-19 05:01:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 260 transitions. [2021-11-19 05:01:33,866 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 260 transitions. Word has length 75 [2021-11-19 05:01:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:33,867 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 260 transitions. [2021-11-19 05:01:33,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-19 05:01:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 260 transitions. [2021-11-19 05:01:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 05:01:33,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:33,869 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:33,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 05:01:33,870 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:33,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:33,871 INFO L85 PathProgramCache]: Analyzing trace with hash -119606255, now seen corresponding path program 1 times [2021-11-19 05:01:33,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:33,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384807732] [2021-11-19 05:01:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:33,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:33,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:33,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384807732] [2021-11-19 05:01:33,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384807732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:33,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:33,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:33,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318180543] [2021-11-19 05:01:33,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:33,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:33,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:33,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:33,980 INFO L87 Difference]: Start difference. First operand 173 states and 260 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2021-11-19 05:01:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:35,223 INFO L93 Difference]: Finished difference Result 342 states and 518 transitions. [2021-11-19 05:01:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:35,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 76 [2021-11-19 05:01:35,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:35,226 INFO L225 Difference]: With dead ends: 342 [2021-11-19 05:01:35,226 INFO L226 Difference]: Without dead ends: 190 [2021-11-19 05:01:35,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:35,227 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 37 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:35,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 517 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 05:01:35,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-19 05:01:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2021-11-19 05:01:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.505813953488372) internal successors, (259), 172 states have internal predecessors, (259), 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) [2021-11-19 05:01:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 259 transitions. [2021-11-19 05:01:35,237 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 259 transitions. Word has length 76 [2021-11-19 05:01:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:35,237 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 259 transitions. [2021-11-19 05:01:35,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2021-11-19 05:01:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 259 transitions. [2021-11-19 05:01:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 05:01:35,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:35,239 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:35,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 05:01:35,240 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1487170778, now seen corresponding path program 1 times [2021-11-19 05:01:35,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:35,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800104771] [2021-11-19 05:01:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:35,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:35,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:35,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800104771] [2021-11-19 05:01:35,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800104771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:35,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:35,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:35,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155800346] [2021-11-19 05:01:35,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:35,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:35,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:35,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:35,323 INFO L87 Difference]: Start difference. First operand 173 states and 259 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2021-11-19 05:01:37,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:37,708 INFO L93 Difference]: Finished difference Result 342 states and 516 transitions. [2021-11-19 05:01:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:37,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 77 [2021-11-19 05:01:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:37,711 INFO L225 Difference]: With dead ends: 342 [2021-11-19 05:01:37,712 INFO L226 Difference]: Without dead ends: 190 [2021-11-19 05:01:37,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:37,713 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 35 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:37,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 517 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:01:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-19 05:01:37,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2021-11-19 05:01:37,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5) internal successors, (258), 172 states have internal predecessors, (258), 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) [2021-11-19 05:01:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 258 transitions. [2021-11-19 05:01:37,724 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 258 transitions. Word has length 77 [2021-11-19 05:01:37,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:37,725 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 258 transitions. [2021-11-19 05:01:37,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2021-11-19 05:01:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 258 transitions. [2021-11-19 05:01:37,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 05:01:37,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:37,727 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:37,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 05:01:37,728 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:37,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:37,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1741200076, now seen corresponding path program 1 times [2021-11-19 05:01:37,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:37,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681567572] [2021-11-19 05:01:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:37,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:37,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:37,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681567572] [2021-11-19 05:01:37,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681567572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:37,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:37,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:37,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843504589] [2021-11-19 05:01:37,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:37,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:37,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:37,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:37,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:37,821 INFO L87 Difference]: Start difference. First operand 173 states and 258 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2021-11-19 05:01:38,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:38,816 INFO L93 Difference]: Finished difference Result 332 states and 501 transitions. [2021-11-19 05:01:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:38,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 78 [2021-11-19 05:01:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:38,819 INFO L225 Difference]: With dead ends: 332 [2021-11-19 05:01:38,819 INFO L226 Difference]: Without dead ends: 180 [2021-11-19 05:01:38,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:38,821 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 26 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:38,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 531 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 05:01:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-19 05:01:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2021-11-19 05:01:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.494186046511628) internal successors, (257), 172 states have internal predecessors, (257), 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) [2021-11-19 05:01:38,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 257 transitions. [2021-11-19 05:01:38,832 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 257 transitions. Word has length 78 [2021-11-19 05:01:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:38,832 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 257 transitions. [2021-11-19 05:01:38,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2021-11-19 05:01:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 257 transitions. [2021-11-19 05:01:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 05:01:38,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:38,835 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:38,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 05:01:38,835 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:38,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:38,836 INFO L85 PathProgramCache]: Analyzing trace with hash 267133317, now seen corresponding path program 1 times [2021-11-19 05:01:38,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:38,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632450937] [2021-11-19 05:01:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:38,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:01:38,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:38,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632450937] [2021-11-19 05:01:38,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632450937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:38,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:38,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:38,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714376272] [2021-11-19 05:01:38,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:38,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:38,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:38,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:38,976 INFO L87 Difference]: Start difference. First operand 173 states and 257 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-19 05:01:40,990 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:41,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:41,559 INFO L93 Difference]: Finished difference Result 435 states and 660 transitions. [2021-11-19 05:01:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:41,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 83 [2021-11-19 05:01:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:41,563 INFO L225 Difference]: With dead ends: 435 [2021-11-19 05:01:41,563 INFO L226 Difference]: Without dead ends: 283 [2021-11-19 05:01:41,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:41,565 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 101 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:41,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 479 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 269 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 05:01:41,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-19 05:01:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 214. [2021-11-19 05:01:41,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.5539906103286385) internal successors, (331), 213 states have internal predecessors, (331), 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) [2021-11-19 05:01:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 331 transitions. [2021-11-19 05:01:41,579 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 331 transitions. Word has length 83 [2021-11-19 05:01:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:41,579 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 331 transitions. [2021-11-19 05:01:41,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-19 05:01:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 331 transitions. [2021-11-19 05:01:41,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 05:01:41,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:41,582 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:41,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 05:01:41,583 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1104673981, now seen corresponding path program 1 times [2021-11-19 05:01:41,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:41,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890440220] [2021-11-19 05:01:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:41,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:01:41,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:41,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890440220] [2021-11-19 05:01:41,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890440220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:41,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:41,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:41,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756041748] [2021-11-19 05:01:41,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:41,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:41,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:41,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:41,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:41,689 INFO L87 Difference]: Start difference. First operand 214 states and 331 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-19 05:01:43,701 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:44,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:44,157 INFO L93 Difference]: Finished difference Result 457 states and 714 transitions. [2021-11-19 05:01:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:44,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 83 [2021-11-19 05:01:44,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:44,161 INFO L225 Difference]: With dead ends: 457 [2021-11-19 05:01:44,161 INFO L226 Difference]: Without dead ends: 264 [2021-11-19 05:01:44,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:44,162 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 42 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:44,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 621 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:01:44,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-19 05:01:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 238. [2021-11-19 05:01:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.5738396624472575) internal successors, (373), 237 states have internal predecessors, (373), 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) [2021-11-19 05:01:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 373 transitions. [2021-11-19 05:01:44,174 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 373 transitions. Word has length 83 [2021-11-19 05:01:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:44,175 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 373 transitions. [2021-11-19 05:01:44,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2021-11-19 05:01:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 373 transitions. [2021-11-19 05:01:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 05:01:44,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:44,177 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:44,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 05:01:44,178 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:44,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:44,179 INFO L85 PathProgramCache]: Analyzing trace with hash -549995900, now seen corresponding path program 1 times [2021-11-19 05:01:44,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:44,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162043091] [2021-11-19 05:01:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:44,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:01:44,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:44,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162043091] [2021-11-19 05:01:44,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162043091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:44,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:44,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:44,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145432300] [2021-11-19 05:01:44,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:44,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:44,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:44,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:44,303 INFO L87 Difference]: Start difference. First operand 238 states and 373 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2021-11-19 05:01:46,315 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:47,013 INFO L93 Difference]: Finished difference Result 517 states and 808 transitions. [2021-11-19 05:01:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:47,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 84 [2021-11-19 05:01:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:47,017 INFO L225 Difference]: With dead ends: 517 [2021-11-19 05:01:47,017 INFO L226 Difference]: Without dead ends: 300 [2021-11-19 05:01:47,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:47,019 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 92 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:47,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 467 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 05:01:47,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-19 05:01:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 239. [2021-11-19 05:01:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.5714285714285714) internal successors, (374), 238 states have internal predecessors, (374), 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) [2021-11-19 05:01:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 374 transitions. [2021-11-19 05:01:47,031 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 374 transitions. Word has length 84 [2021-11-19 05:01:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:47,031 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 374 transitions. [2021-11-19 05:01:47,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2021-11-19 05:01:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 374 transitions. [2021-11-19 05:01:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 05:01:47,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:47,034 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:47,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 05:01:47,035 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:47,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:47,035 INFO L85 PathProgramCache]: Analyzing trace with hash 638066980, now seen corresponding path program 1 times [2021-11-19 05:01:47,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:47,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831245321] [2021-11-19 05:01:47,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:47,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:01:47,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:47,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831245321] [2021-11-19 05:01:47,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831245321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:47,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:47,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:47,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695487550] [2021-11-19 05:01:47,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:47,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:47,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:47,125 INFO L87 Difference]: Start difference. First operand 239 states and 374 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2021-11-19 05:01:49,137 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:49,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:49,681 INFO L93 Difference]: Finished difference Result 518 states and 808 transitions. [2021-11-19 05:01:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:49,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 96 [2021-11-19 05:01:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:49,685 INFO L225 Difference]: With dead ends: 518 [2021-11-19 05:01:49,686 INFO L226 Difference]: Without dead ends: 300 [2021-11-19 05:01:49,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:49,688 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 115 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:49,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 469 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 264 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:01:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-19 05:01:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 239. [2021-11-19 05:01:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.5672268907563025) internal successors, (373), 238 states have internal predecessors, (373), 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) [2021-11-19 05:01:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 373 transitions. [2021-11-19 05:01:49,702 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 373 transitions. Word has length 96 [2021-11-19 05:01:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:49,703 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 373 transitions. [2021-11-19 05:01:49,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2021-11-19 05:01:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 373 transitions. [2021-11-19 05:01:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 05:01:49,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:49,706 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:49,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 05:01:49,707 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:49,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:49,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1081967654, now seen corresponding path program 1 times [2021-11-19 05:01:49,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:49,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443734384] [2021-11-19 05:01:49,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:49,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:01:49,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:49,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443734384] [2021-11-19 05:01:49,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443734384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:49,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:49,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:49,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219906308] [2021-11-19 05:01:49,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:49,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:49,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:49,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:49,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:49,825 INFO L87 Difference]: Start difference. First operand 239 states and 373 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2021-11-19 05:01:51,841 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:52,316 INFO L93 Difference]: Finished difference Result 483 states and 755 transitions. [2021-11-19 05:01:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 96 [2021-11-19 05:01:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:52,324 INFO L225 Difference]: With dead ends: 483 [2021-11-19 05:01:52,324 INFO L226 Difference]: Without dead ends: 265 [2021-11-19 05:01:52,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:52,332 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 49 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:52,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 621 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:01:52,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-19 05:01:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 239. [2021-11-19 05:01:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.5630252100840336) internal successors, (372), 238 states have internal predecessors, (372), 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) [2021-11-19 05:01:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 372 transitions. [2021-11-19 05:01:52,346 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 372 transitions. Word has length 96 [2021-11-19 05:01:52,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:52,347 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 372 transitions. [2021-11-19 05:01:52,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2021-11-19 05:01:52,348 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 372 transitions. [2021-11-19 05:01:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 05:01:52,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:52,350 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:52,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 05:01:52,351 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:52,351 INFO L85 PathProgramCache]: Analyzing trace with hash -609874283, now seen corresponding path program 1 times [2021-11-19 05:01:52,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:52,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099566363] [2021-11-19 05:01:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:52,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:01:52,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:52,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099566363] [2021-11-19 05:01:52,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099566363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:52,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:52,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:52,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095909752] [2021-11-19 05:01:52,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:52,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:52,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:52,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:52,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:52,506 INFO L87 Difference]: Start difference. First operand 239 states and 372 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-11-19 05:01:54,519 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:55,068 INFO L93 Difference]: Finished difference Result 517 states and 803 transitions. [2021-11-19 05:01:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:55,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 97 [2021-11-19 05:01:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:55,072 INFO L225 Difference]: With dead ends: 517 [2021-11-19 05:01:55,073 INFO L226 Difference]: Without dead ends: 299 [2021-11-19 05:01:55,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:55,075 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 119 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:55,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 467 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:01:55,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-19 05:01:55,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 239. [2021-11-19 05:01:55,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.5588235294117647) internal successors, (371), 238 states have internal predecessors, (371), 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) [2021-11-19 05:01:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 371 transitions. [2021-11-19 05:01:55,090 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 371 transitions. Word has length 97 [2021-11-19 05:01:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:55,090 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 371 transitions. [2021-11-19 05:01:55,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-11-19 05:01:55,091 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 371 transitions. [2021-11-19 05:01:55,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 05:01:55,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:55,094 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:55,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 05:01:55,094 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:55,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1657385087, now seen corresponding path program 1 times [2021-11-19 05:01:55,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:55,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307885886] [2021-11-19 05:01:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:55,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:01:55,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:55,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307885886] [2021-11-19 05:01:55,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307885886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:55,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:55,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:01:55,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124828512] [2021-11-19 05:01:55,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:55,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:01:55,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:55,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:01:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:55,239 INFO L87 Difference]: Start difference. First operand 239 states and 371 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 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) [2021-11-19 05:01:56,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:58,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:01:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:59,368 INFO L93 Difference]: Finished difference Result 478 states and 747 transitions. [2021-11-19 05:01:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:01:59,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 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 97 [2021-11-19 05:01:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:59,371 INFO L225 Difference]: With dead ends: 478 [2021-11-19 05:01:59,372 INFO L226 Difference]: Without dead ends: 260 [2021-11-19 05:01:59,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:01:59,374 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 158 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:59,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 372 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 311 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-19 05:01:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-19 05:01:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-11-19 05:01:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5387596899224807) internal successors, (397), 258 states have internal predecessors, (397), 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) [2021-11-19 05:01:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 397 transitions. [2021-11-19 05:01:59,388 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 397 transitions. Word has length 97 [2021-11-19 05:01:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:59,389 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 397 transitions. [2021-11-19 05:01:59,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 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) [2021-11-19 05:01:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 397 transitions. [2021-11-19 05:01:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 05:01:59,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:59,392 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:59,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 05:01:59,393 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:01:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1501715914, now seen corresponding path program 1 times [2021-11-19 05:01:59,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:59,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234209502] [2021-11-19 05:01:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:59,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:01:59,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:59,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234209502] [2021-11-19 05:01:59,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234209502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:59,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:59,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:59,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56466002] [2021-11-19 05:01:59,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:59,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:59,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:59,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:59,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:59,499 INFO L87 Difference]: Start difference. First operand 259 states and 397 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-11-19 05:02:01,512 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:02,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:02,097 INFO L93 Difference]: Finished difference Result 556 states and 851 transitions. [2021-11-19 05:02:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:02,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 97 [2021-11-19 05:02:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:02,102 INFO L225 Difference]: With dead ends: 556 [2021-11-19 05:02:02,103 INFO L226 Difference]: Without dead ends: 318 [2021-11-19 05:02:02,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:02,105 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 111 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:02,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 471 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:02:02,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-19 05:02:02,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2021-11-19 05:02:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5348837209302326) internal successors, (396), 258 states have internal predecessors, (396), 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) [2021-11-19 05:02:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 396 transitions. [2021-11-19 05:02:02,121 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 396 transitions. Word has length 97 [2021-11-19 05:02:02,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:02,121 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 396 transitions. [2021-11-19 05:02:02,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-11-19 05:02:02,122 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 396 transitions. [2021-11-19 05:02:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 05:02:02,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:02,124 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:02,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 05:02:02,125 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:02,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1472398070, now seen corresponding path program 1 times [2021-11-19 05:02:02,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:02,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141959624] [2021-11-19 05:02:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:02,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:02:02,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:02,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141959624] [2021-11-19 05:02:02,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141959624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:02,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:02,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:02,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24994001] [2021-11-19 05:02:02,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:02,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:02,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:02,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:02,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:02,247 INFO L87 Difference]: Start difference. First operand 259 states and 396 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-11-19 05:02:04,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:04,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:04,685 INFO L93 Difference]: Finished difference Result 554 states and 847 transitions. [2021-11-19 05:02:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:04,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 97 [2021-11-19 05:02:04,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:04,690 INFO L225 Difference]: With dead ends: 554 [2021-11-19 05:02:04,690 INFO L226 Difference]: Without dead ends: 316 [2021-11-19 05:02:04,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:04,694 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 111 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:04,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 475 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:02:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-19 05:02:04,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 259. [2021-11-19 05:02:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5310077519379846) internal successors, (395), 258 states have internal predecessors, (395), 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) [2021-11-19 05:02:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 395 transitions. [2021-11-19 05:02:04,716 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 395 transitions. Word has length 97 [2021-11-19 05:02:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:04,717 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 395 transitions. [2021-11-19 05:02:04,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-11-19 05:02:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 395 transitions. [2021-11-19 05:02:04,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 05:02:04,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:04,720 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:04,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 05:02:04,722 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:04,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:04,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1917232376, now seen corresponding path program 1 times [2021-11-19 05:02:04,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:04,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192171869] [2021-11-19 05:02:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:04,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:02:04,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:04,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192171869] [2021-11-19 05:02:04,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192171869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:04,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:04,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:04,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371760212] [2021-11-19 05:02:04,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:04,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:04,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:04,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:04,840 INFO L87 Difference]: Start difference. First operand 259 states and 395 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-11-19 05:02:06,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:07,269 INFO L93 Difference]: Finished difference Result 521 states and 796 transitions. [2021-11-19 05:02:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:07,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 97 [2021-11-19 05:02:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:07,273 INFO L225 Difference]: With dead ends: 521 [2021-11-19 05:02:07,273 INFO L226 Difference]: Without dead ends: 283 [2021-11-19 05:02:07,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:07,275 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 45 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:07,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 611 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:02:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-19 05:02:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 259. [2021-11-19 05:02:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5271317829457365) internal successors, (394), 258 states have internal predecessors, (394), 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) [2021-11-19 05:02:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 394 transitions. [2021-11-19 05:02:07,290 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 394 transitions. Word has length 97 [2021-11-19 05:02:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:07,291 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 394 transitions. [2021-11-19 05:02:07,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-11-19 05:02:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 394 transitions. [2021-11-19 05:02:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 05:02:07,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:07,294 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:07,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 05:02:07,295 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:07,295 INFO L85 PathProgramCache]: Analyzing trace with hash -596379064, now seen corresponding path program 1 times [2021-11-19 05:02:07,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:07,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004231294] [2021-11-19 05:02:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:07,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:02:07,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:07,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004231294] [2021-11-19 05:02:07,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004231294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:07,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:07,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:07,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006371521] [2021-11-19 05:02:07,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:07,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:07,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:07,413 INFO L87 Difference]: Start difference. First operand 259 states and 394 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-11-19 05:02:09,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:09,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:09,825 INFO L93 Difference]: Finished difference Result 519 states and 792 transitions. [2021-11-19 05:02:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:09,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 97 [2021-11-19 05:02:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:09,828 INFO L225 Difference]: With dead ends: 519 [2021-11-19 05:02:09,829 INFO L226 Difference]: Without dead ends: 281 [2021-11-19 05:02:09,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:09,831 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 45 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:09,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 615 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:02:09,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-19 05:02:09,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 259. [2021-11-19 05:02:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5232558139534884) internal successors, (393), 258 states have internal predecessors, (393), 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) [2021-11-19 05:02:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 393 transitions. [2021-11-19 05:02:09,846 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 393 transitions. Word has length 97 [2021-11-19 05:02:09,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:09,846 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 393 transitions. [2021-11-19 05:02:09,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-11-19 05:02:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 393 transitions. [2021-11-19 05:02:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 05:02:09,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:09,849 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:09,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-19 05:02:09,850 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:09,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2071654008, now seen corresponding path program 1 times [2021-11-19 05:02:09,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:09,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756234644] [2021-11-19 05:02:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:09,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:02:09,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:09,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756234644] [2021-11-19 05:02:09,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756234644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:09,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:09,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:09,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756392575] [2021-11-19 05:02:09,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:09,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:09,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:09,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:09,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:09,949 INFO L87 Difference]: Start difference. First operand 259 states and 393 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2021-11-19 05:02:11,961 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:12,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:12,562 INFO L93 Difference]: Finished difference Result 554 states and 841 transitions. [2021-11-19 05:02:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:12,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 98 [2021-11-19 05:02:12,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:12,566 INFO L225 Difference]: With dead ends: 554 [2021-11-19 05:02:12,566 INFO L226 Difference]: Without dead ends: 316 [2021-11-19 05:02:12,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:12,568 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 115 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:12,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 499 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 05:02:12,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-19 05:02:12,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 259. [2021-11-19 05:02:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5193798449612403) internal successors, (392), 258 states have internal predecessors, (392), 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) [2021-11-19 05:02:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 392 transitions. [2021-11-19 05:02:12,583 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 392 transitions. Word has length 98 [2021-11-19 05:02:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:12,583 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 392 transitions. [2021-11-19 05:02:12,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2021-11-19 05:02:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 392 transitions. [2021-11-19 05:02:12,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 05:02:12,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:12,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:12,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-19 05:02:12,587 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:12,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:12,587 INFO L85 PathProgramCache]: Analyzing trace with hash -684868598, now seen corresponding path program 1 times [2021-11-19 05:02:12,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:12,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160862501] [2021-11-19 05:02:12,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:12,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:02:12,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:12,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160862501] [2021-11-19 05:02:12,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160862501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:12,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:12,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:12,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223299664] [2021-11-19 05:02:12,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:12,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:12,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:12,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:12,715 INFO L87 Difference]: Start difference. First operand 259 states and 392 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2021-11-19 05:02:14,727 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:15,182 INFO L93 Difference]: Finished difference Result 519 states and 788 transitions. [2021-11-19 05:02:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:15,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 98 [2021-11-19 05:02:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:15,190 INFO L225 Difference]: With dead ends: 519 [2021-11-19 05:02:15,190 INFO L226 Difference]: Without dead ends: 281 [2021-11-19 05:02:15,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:15,193 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 49 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:15,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 613 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:02:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-19 05:02:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 259. [2021-11-19 05:02:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5155038759689923) internal successors, (391), 258 states have internal predecessors, (391), 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) [2021-11-19 05:02:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 391 transitions. [2021-11-19 05:02:15,209 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 391 transitions. Word has length 98 [2021-11-19 05:02:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:15,210 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 391 transitions. [2021-11-19 05:02:15,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2021-11-19 05:02:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 391 transitions. [2021-11-19 05:02:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 05:02:15,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:15,212 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:15,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-19 05:02:15,213 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:15,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1603519150, now seen corresponding path program 1 times [2021-11-19 05:02:15,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:15,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281752907] [2021-11-19 05:02:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:15,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:02:15,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:15,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281752907] [2021-11-19 05:02:15,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281752907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:15,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:15,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:15,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324592480] [2021-11-19 05:02:15,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:15,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:15,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:15,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:15,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:15,317 INFO L87 Difference]: Start difference. First operand 259 states and 391 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2021-11-19 05:02:17,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:17,891 INFO L93 Difference]: Finished difference Result 554 states and 837 transitions. [2021-11-19 05:02:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:17,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 99 [2021-11-19 05:02:17,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:17,895 INFO L225 Difference]: With dead ends: 554 [2021-11-19 05:02:17,895 INFO L226 Difference]: Without dead ends: 316 [2021-11-19 05:02:17,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:17,897 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 113 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:17,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 499 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:02:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-19 05:02:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 259. [2021-11-19 05:02:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5116279069767442) internal successors, (390), 258 states have internal predecessors, (390), 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) [2021-11-19 05:02:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 390 transitions. [2021-11-19 05:02:17,912 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 390 transitions. Word has length 99 [2021-11-19 05:02:17,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:17,912 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 390 transitions. [2021-11-19 05:02:17,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2021-11-19 05:02:17,913 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 390 transitions. [2021-11-19 05:02:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 05:02:17,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:17,915 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:17,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-19 05:02:17,916 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1644193900, now seen corresponding path program 1 times [2021-11-19 05:02:17,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:17,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148731252] [2021-11-19 05:02:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:17,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:02:18,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:18,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148731252] [2021-11-19 05:02:18,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148731252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:18,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:18,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:18,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645837298] [2021-11-19 05:02:18,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:18,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:18,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:18,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:18,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:18,019 INFO L87 Difference]: Start difference. First operand 259 states and 390 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2021-11-19 05:02:20,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:20,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:20,429 INFO L93 Difference]: Finished difference Result 519 states and 784 transitions. [2021-11-19 05:02:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:20,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 99 [2021-11-19 05:02:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:20,433 INFO L225 Difference]: With dead ends: 519 [2021-11-19 05:02:20,433 INFO L226 Difference]: Without dead ends: 281 [2021-11-19 05:02:20,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:20,435 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 47 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:20,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 611 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:02:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-19 05:02:20,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 259. [2021-11-19 05:02:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5077519379844961) internal successors, (389), 258 states have internal predecessors, (389), 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) [2021-11-19 05:02:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 389 transitions. [2021-11-19 05:02:20,450 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 389 transitions. Word has length 99 [2021-11-19 05:02:20,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:20,450 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 389 transitions. [2021-11-19 05:02:20,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2021-11-19 05:02:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 389 transitions. [2021-11-19 05:02:20,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 05:02:20,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:20,453 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:20,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-19 05:02:20,454 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:20,455 INFO L85 PathProgramCache]: Analyzing trace with hash 834532749, now seen corresponding path program 1 times [2021-11-19 05:02:20,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:20,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16648800] [2021-11-19 05:02:20,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:20,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:02:20,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:20,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16648800] [2021-11-19 05:02:20,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16648800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:20,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:20,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:20,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316060663] [2021-11-19 05:02:20,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:20,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:20,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:20,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:20,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:20,586 INFO L87 Difference]: Start difference. First operand 259 states and 389 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-11-19 05:02:22,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:23,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:23,157 INFO L93 Difference]: Finished difference Result 554 states and 833 transitions. [2021-11-19 05:02:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:23,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 100 [2021-11-19 05:02:23,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:23,161 INFO L225 Difference]: With dead ends: 554 [2021-11-19 05:02:23,162 INFO L226 Difference]: Without dead ends: 316 [2021-11-19 05:02:23,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:23,164 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 111 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:23,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 499 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:02:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-19 05:02:23,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 259. [2021-11-19 05:02:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.503875968992248) internal successors, (388), 258 states have internal predecessors, (388), 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) [2021-11-19 05:02:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 388 transitions. [2021-11-19 05:02:23,180 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 388 transitions. Word has length 100 [2021-11-19 05:02:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:23,180 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 388 transitions. [2021-11-19 05:02:23,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-11-19 05:02:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 388 transitions. [2021-11-19 05:02:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 05:02:23,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:23,183 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:23,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-19 05:02:23,184 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:23,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:23,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2095449999, now seen corresponding path program 1 times [2021-11-19 05:02:23,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:23,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119024715] [2021-11-19 05:02:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:23,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:02:23,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:23,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119024715] [2021-11-19 05:02:23,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119024715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:23,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:23,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:23,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171923685] [2021-11-19 05:02:23,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:23,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:23,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:23,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:23,278 INFO L87 Difference]: Start difference. First operand 259 states and 388 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-11-19 05:02:25,291 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:25,751 INFO L93 Difference]: Finished difference Result 519 states and 780 transitions. [2021-11-19 05:02:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:25,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 100 [2021-11-19 05:02:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:25,754 INFO L225 Difference]: With dead ends: 519 [2021-11-19 05:02:25,754 INFO L226 Difference]: Without dead ends: 281 [2021-11-19 05:02:25,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:25,755 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 45 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:25,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 609 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:02:25,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-19 05:02:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 259. [2021-11-19 05:02:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5) internal successors, (387), 258 states have internal predecessors, (387), 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) [2021-11-19 05:02:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 387 transitions. [2021-11-19 05:02:25,776 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 387 transitions. Word has length 100 [2021-11-19 05:02:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:25,777 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 387 transitions. [2021-11-19 05:02:25,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-11-19 05:02:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 387 transitions. [2021-11-19 05:02:25,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 05:02:25,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:25,779 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:25,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-19 05:02:25,780 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:25,781 INFO L85 PathProgramCache]: Analyzing trace with hash -264446509, now seen corresponding path program 1 times [2021-11-19 05:02:25,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:25,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954527478] [2021-11-19 05:02:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:25,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:02:25,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:25,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954527478] [2021-11-19 05:02:25,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954527478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:25,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:25,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:25,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607039879] [2021-11-19 05:02:25,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:25,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:25,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:25,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:25,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:25,885 INFO L87 Difference]: Start difference. First operand 259 states and 387 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-11-19 05:02:27,896 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:28,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:28,412 INFO L93 Difference]: Finished difference Result 544 states and 817 transitions. [2021-11-19 05:02:28,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:28,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 101 [2021-11-19 05:02:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:28,416 INFO L225 Difference]: With dead ends: 544 [2021-11-19 05:02:28,417 INFO L226 Difference]: Without dead ends: 306 [2021-11-19 05:02:28,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:28,418 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 102 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:28,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 487 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:02:28,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-19 05:02:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 259. [2021-11-19 05:02:28,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.496124031007752) internal successors, (386), 258 states have internal predecessors, (386), 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) [2021-11-19 05:02:28,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 386 transitions. [2021-11-19 05:02:28,434 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 386 transitions. Word has length 101 [2021-11-19 05:02:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:28,435 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 386 transitions. [2021-11-19 05:02:28,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-11-19 05:02:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 386 transitions. [2021-11-19 05:02:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 05:02:28,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:28,438 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:28,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-19 05:02:28,438 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:28,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:28,439 INFO L85 PathProgramCache]: Analyzing trace with hash 169282577, now seen corresponding path program 1 times [2021-11-19 05:02:28,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:28,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594537210] [2021-11-19 05:02:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:28,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:02:28,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:28,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594537210] [2021-11-19 05:02:28,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594537210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:28,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:28,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:28,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247744714] [2021-11-19 05:02:28,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:28,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:28,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:28,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:28,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:28,545 INFO L87 Difference]: Start difference. First operand 259 states and 386 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-11-19 05:02:30,557 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:30,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:30,917 INFO L93 Difference]: Finished difference Result 509 states and 764 transitions. [2021-11-19 05:02:30,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:30,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 101 [2021-11-19 05:02:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:30,920 INFO L225 Difference]: With dead ends: 509 [2021-11-19 05:02:30,920 INFO L226 Difference]: Without dead ends: 271 [2021-11-19 05:02:30,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:30,923 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 36 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:30,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 595 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 05:02:30,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-19 05:02:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 259. [2021-11-19 05:02:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.4922480620155039) internal successors, (385), 258 states have internal predecessors, (385), 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) [2021-11-19 05:02:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 385 transitions. [2021-11-19 05:02:30,939 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 385 transitions. Word has length 101 [2021-11-19 05:02:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:30,939 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 385 transitions. [2021-11-19 05:02:30,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-11-19 05:02:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 385 transitions. [2021-11-19 05:02:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 05:02:30,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:30,942 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:30,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-19 05:02:30,943 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:30,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1688551859, now seen corresponding path program 1 times [2021-11-19 05:02:30,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:30,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128530288] [2021-11-19 05:02:30,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:30,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:02:31,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:31,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128530288] [2021-11-19 05:02:31,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128530288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:31,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:31,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:31,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260436666] [2021-11-19 05:02:31,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:31,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:31,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:31,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:31,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:31,042 INFO L87 Difference]: Start difference. First operand 259 states and 385 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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) [2021-11-19 05:02:33,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:33,619 INFO L93 Difference]: Finished difference Result 544 states and 813 transitions. [2021-11-19 05:02:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:33,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 105 [2021-11-19 05:02:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:33,622 INFO L225 Difference]: With dead ends: 544 [2021-11-19 05:02:33,622 INFO L226 Difference]: Without dead ends: 306 [2021-11-19 05:02:33,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:33,624 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 92 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:33,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 503 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:02:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-19 05:02:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 259. [2021-11-19 05:02:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.4883720930232558) internal successors, (384), 258 states have internal predecessors, (384), 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) [2021-11-19 05:02:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 384 transitions. [2021-11-19 05:02:33,637 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 384 transitions. Word has length 105 [2021-11-19 05:02:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:33,638 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 384 transitions. [2021-11-19 05:02:33,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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) [2021-11-19 05:02:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 384 transitions. [2021-11-19 05:02:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 05:02:33,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:33,640 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:33,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-19 05:02:33,641 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:33,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1009279605, now seen corresponding path program 1 times [2021-11-19 05:02:33,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:33,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887171930] [2021-11-19 05:02:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:33,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 05:02:33,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:33,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887171930] [2021-11-19 05:02:33,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887171930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:33,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:33,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:02:33,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562087305] [2021-11-19 05:02:33,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:33,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:02:33,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:33,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:02:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:02:33,750 INFO L87 Difference]: Start difference. First operand 259 states and 384 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2021-11-19 05:02:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:33,845 INFO L93 Difference]: Finished difference Result 732 states and 1100 transitions. [2021-11-19 05:02:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:02:33,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 105 [2021-11-19 05:02:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:33,850 INFO L225 Difference]: With dead ends: 732 [2021-11-19 05:02:33,851 INFO L226 Difference]: Without dead ends: 494 [2021-11-19 05:02:33,851 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 [2021-11-19 05:02:33,853 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:33,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 431 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:02:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-19 05:02:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 494. [2021-11-19 05:02:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 1.4766734279918865) internal successors, (728), 493 states have internal predecessors, (728), 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) [2021-11-19 05:02:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 728 transitions. [2021-11-19 05:02:33,877 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 728 transitions. Word has length 105 [2021-11-19 05:02:33,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:33,878 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 728 transitions. [2021-11-19 05:02:33,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2021-11-19 05:02:33,879 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 728 transitions. [2021-11-19 05:02:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 05:02:33,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:33,881 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:33,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-19 05:02:33,882 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:33,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1063672503, now seen corresponding path program 1 times [2021-11-19 05:02:33,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:33,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57445628] [2021-11-19 05:02:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:33,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 05:02:33,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:33,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57445628] [2021-11-19 05:02:33,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57445628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:33,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:33,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:02:33,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575562081] [2021-11-19 05:02:33,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:33,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:02:33,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:33,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:02:33,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:02:33,962 INFO L87 Difference]: Start difference. First operand 494 states and 728 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-11-19 05:02:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:34,029 INFO L93 Difference]: Finished difference Result 994 states and 1468 transitions. [2021-11-19 05:02:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:02:34,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 105 [2021-11-19 05:02:34,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:34,035 INFO L225 Difference]: With dead ends: 994 [2021-11-19 05:02:34,035 INFO L226 Difference]: Without dead ends: 521 [2021-11-19 05:02:34,040 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 [2021-11-19 05:02:34,041 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:34,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 416 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:02:34,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-11-19 05:02:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2021-11-19 05:02:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.4673076923076922) internal successors, (763), 520 states have internal predecessors, (763), 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) [2021-11-19 05:02:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 763 transitions. [2021-11-19 05:02:34,072 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 763 transitions. Word has length 105 [2021-11-19 05:02:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:34,073 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 763 transitions. [2021-11-19 05:02:34,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-11-19 05:02:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 763 transitions. [2021-11-19 05:02:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 05:02:34,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:34,077 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:34,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-19 05:02:34,077 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:34,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:34,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1352163847, now seen corresponding path program 1 times [2021-11-19 05:02:34,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:34,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804352138] [2021-11-19 05:02:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:34,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 05:02:34,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:34,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804352138] [2021-11-19 05:02:34,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804352138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:34,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:34,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:02:34,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511563351] [2021-11-19 05:02:34,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:34,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:02:34,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:34,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:02:34,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:02:34,156 INFO L87 Difference]: Start difference. First operand 521 states and 763 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-19 05:02:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:34,203 INFO L93 Difference]: Finished difference Result 1023 states and 1504 transitions. [2021-11-19 05:02:34,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:02:34,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 105 [2021-11-19 05:02:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:34,208 INFO L225 Difference]: With dead ends: 1023 [2021-11-19 05:02:34,208 INFO L226 Difference]: Without dead ends: 523 [2021-11-19 05:02:34,209 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 [2021-11-19 05:02:34,211 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:34,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 395 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:02:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-19 05:02:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2021-11-19 05:02:34,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.4655172413793103) internal successors, (765), 522 states have internal predecessors, (765), 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) [2021-11-19 05:02:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 765 transitions. [2021-11-19 05:02:34,257 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 765 transitions. Word has length 105 [2021-11-19 05:02:34,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:34,258 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 765 transitions. [2021-11-19 05:02:34,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-19 05:02:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 765 transitions. [2021-11-19 05:02:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 05:02:34,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:34,262 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:34,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-19 05:02:34,263 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:34,263 INFO L85 PathProgramCache]: Analyzing trace with hash -823324255, now seen corresponding path program 1 times [2021-11-19 05:02:34,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:34,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271259472] [2021-11-19 05:02:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:34,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 05:02:34,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:34,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271259472] [2021-11-19 05:02:34,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271259472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:34,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:34,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:02:34,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280789631] [2021-11-19 05:02:34,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:34,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:02:34,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:34,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:02:34,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:02:34,370 INFO L87 Difference]: Start difference. First operand 523 states and 765 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2021-11-19 05:02:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:34,477 INFO L93 Difference]: Finished difference Result 1258 states and 1860 transitions. [2021-11-19 05:02:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:02:34,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-19 05:02:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:34,485 INFO L225 Difference]: With dead ends: 1258 [2021-11-19 05:02:34,485 INFO L226 Difference]: Without dead ends: 758 [2021-11-19 05:02:34,487 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 [2021-11-19 05:02:34,488 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:34,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 576 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:02:34,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-11-19 05:02:34,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 758. [2021-11-19 05:02:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 1.464993394980185) internal successors, (1109), 757 states have internal predecessors, (1109), 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) [2021-11-19 05:02:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1109 transitions. [2021-11-19 05:02:34,527 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1109 transitions. Word has length 107 [2021-11-19 05:02:34,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:34,528 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 1109 transitions. [2021-11-19 05:02:34,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2021-11-19 05:02:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1109 transitions. [2021-11-19 05:02:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 05:02:34,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:34,532 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:34,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-19 05:02:34,532 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:34,533 INFO L85 PathProgramCache]: Analyzing trace with hash 722138639, now seen corresponding path program 1 times [2021-11-19 05:02:34,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:34,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995936350] [2021-11-19 05:02:34,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:34,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:02:34,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:34,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995936350] [2021-11-19 05:02:34,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995936350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:34,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:34,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:34,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102196136] [2021-11-19 05:02:34,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:34,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:34,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:34,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:34,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:34,668 INFO L87 Difference]: Start difference. First operand 758 states and 1109 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-11-19 05:02:36,680 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:37,287 INFO L93 Difference]: Finished difference Result 1682 states and 2479 transitions. [2021-11-19 05:02:37,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:37,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 136 [2021-11-19 05:02:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:37,300 INFO L225 Difference]: With dead ends: 1682 [2021-11-19 05:02:37,300 INFO L226 Difference]: Without dead ends: 947 [2021-11-19 05:02:37,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:37,303 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 55 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:37,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 635 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 217 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 05:02:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-19 05:02:37,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 842. [2021-11-19 05:02:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.49346016646849) internal successors, (1256), 841 states have internal predecessors, (1256), 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) [2021-11-19 05:02:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1256 transitions. [2021-11-19 05:02:37,343 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1256 transitions. Word has length 136 [2021-11-19 05:02:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:37,346 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1256 transitions. [2021-11-19 05:02:37,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-11-19 05:02:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1256 transitions. [2021-11-19 05:02:37,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 05:02:37,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:37,351 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:37,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-19 05:02:37,351 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:37,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:37,352 INFO L85 PathProgramCache]: Analyzing trace with hash -131040038, now seen corresponding path program 1 times [2021-11-19 05:02:37,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:37,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292182325] [2021-11-19 05:02:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:37,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:02:37,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:37,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292182325] [2021-11-19 05:02:37,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292182325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:37,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:37,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:37,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959849613] [2021-11-19 05:02:37,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:37,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:37,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:37,528 INFO L87 Difference]: Start difference. First operand 842 states and 1256 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-11-19 05:02:39,135 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:39,686 INFO L93 Difference]: Finished difference Result 1766 states and 2623 transitions. [2021-11-19 05:02:39,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:39,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-19 05:02:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:39,695 INFO L225 Difference]: With dead ends: 1766 [2021-11-19 05:02:39,696 INFO L226 Difference]: Without dead ends: 947 [2021-11-19 05:02:39,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:39,698 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 66 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:39,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 635 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 05:02:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-19 05:02:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 842. [2021-11-19 05:02:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.4898929845422118) internal successors, (1253), 841 states have internal predecessors, (1253), 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) [2021-11-19 05:02:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1253 transitions. [2021-11-19 05:02:39,737 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1253 transitions. Word has length 149 [2021-11-19 05:02:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:39,738 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1253 transitions. [2021-11-19 05:02:39,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-11-19 05:02:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1253 transitions. [2021-11-19 05:02:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 05:02:39,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:39,742 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:39,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-19 05:02:39,743 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:39,744 INFO L85 PathProgramCache]: Analyzing trace with hash -865765164, now seen corresponding path program 1 times [2021-11-19 05:02:39,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:39,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980693569] [2021-11-19 05:02:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:39,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:02:39,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:39,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980693569] [2021-11-19 05:02:39,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980693569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:39,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:39,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:39,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679054632] [2021-11-19 05:02:39,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:39,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:39,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:39,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:39,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:39,878 INFO L87 Difference]: Start difference. First operand 842 states and 1253 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2021-11-19 05:02:41,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:42,336 INFO L93 Difference]: Finished difference Result 1763 states and 2614 transitions. [2021-11-19 05:02:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:42,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 150 [2021-11-19 05:02:42,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:42,345 INFO L225 Difference]: With dead ends: 1763 [2021-11-19 05:02:42,345 INFO L226 Difference]: Without dead ends: 944 [2021-11-19 05:02:42,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:42,348 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 63 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:42,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 633 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:02:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-11-19 05:02:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 842. [2021-11-19 05:02:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.4863258026159334) internal successors, (1250), 841 states have internal predecessors, (1250), 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) [2021-11-19 05:02:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1250 transitions. [2021-11-19 05:02:42,420 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1250 transitions. Word has length 150 [2021-11-19 05:02:42,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:42,420 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1250 transitions. [2021-11-19 05:02:42,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2021-11-19 05:02:42,421 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1250 transitions. [2021-11-19 05:02:42,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 05:02:42,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:42,425 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:42,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-19 05:02:42,425 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:42,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:42,426 INFO L85 PathProgramCache]: Analyzing trace with hash 455088148, now seen corresponding path program 1 times [2021-11-19 05:02:42,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:42,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135640511] [2021-11-19 05:02:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:42,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:02:42,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:42,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135640511] [2021-11-19 05:02:42,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135640511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:42,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:42,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:42,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919702395] [2021-11-19 05:02:42,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:42,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:42,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:42,550 INFO L87 Difference]: Start difference. First operand 842 states and 1250 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2021-11-19 05:02:44,563 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:45,067 INFO L93 Difference]: Finished difference Result 1757 states and 2602 transitions. [2021-11-19 05:02:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:45,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 150 [2021-11-19 05:02:45,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:45,077 INFO L225 Difference]: With dead ends: 1757 [2021-11-19 05:02:45,078 INFO L226 Difference]: Without dead ends: 938 [2021-11-19 05:02:45,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:45,081 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 63 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:45,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 631 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 05:02:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-11-19 05:02:45,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 842. [2021-11-19 05:02:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.4827586206896552) internal successors, (1247), 841 states have internal predecessors, (1247), 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) [2021-11-19 05:02:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1247 transitions. [2021-11-19 05:02:45,128 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1247 transitions. Word has length 150 [2021-11-19 05:02:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:45,129 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1247 transitions. [2021-11-19 05:02:45,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2021-11-19 05:02:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1247 transitions. [2021-11-19 05:02:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 05:02:45,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:45,137 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:45,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-19 05:02:45,138 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1845843902, now seen corresponding path program 1 times [2021-11-19 05:02:45,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:45,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097384133] [2021-11-19 05:02:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:45,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:02:45,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:45,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097384133] [2021-11-19 05:02:45,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097384133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:45,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:45,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:45,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004807133] [2021-11-19 05:02:45,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:45,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:45,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:45,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:45,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:45,253 INFO L87 Difference]: Start difference. First operand 842 states and 1247 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:02:47,061 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:47,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:47,503 INFO L93 Difference]: Finished difference Result 1757 states and 2596 transitions. [2021-11-19 05:02:47,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:47,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-19 05:02:47,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:47,519 INFO L225 Difference]: With dead ends: 1757 [2021-11-19 05:02:47,520 INFO L226 Difference]: Without dead ends: 938 [2021-11-19 05:02:47,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:47,523 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 67 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:47,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 629 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 05:02:47,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-11-19 05:02:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 842. [2021-11-19 05:02:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.4791914387633769) internal successors, (1244), 841 states have internal predecessors, (1244), 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) [2021-11-19 05:02:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1244 transitions. [2021-11-19 05:02:47,572 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1244 transitions. Word has length 151 [2021-11-19 05:02:47,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:47,573 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1244 transitions. [2021-11-19 05:02:47,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:02:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1244 transitions. [2021-11-19 05:02:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 05:02:47,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:47,578 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:47,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-19 05:02:47,578 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:47,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1508097224, now seen corresponding path program 1 times [2021-11-19 05:02:47,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:47,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510744088] [2021-11-19 05:02:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:47,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:02:47,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:47,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510744088] [2021-11-19 05:02:47,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510744088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:47,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:47,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:47,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718588139] [2021-11-19 05:02:47,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:47,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:47,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:47,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:47,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:47,683 INFO L87 Difference]: Start difference. First operand 842 states and 1244 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:02:49,701 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:50,090 INFO L93 Difference]: Finished difference Result 1757 states and 2590 transitions. [2021-11-19 05:02:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:50,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-19 05:02:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:50,098 INFO L225 Difference]: With dead ends: 1757 [2021-11-19 05:02:50,098 INFO L226 Difference]: Without dead ends: 938 [2021-11-19 05:02:50,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:50,101 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 65 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:50,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 627 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:02:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-11-19 05:02:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 842. [2021-11-19 05:02:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.4756242568370987) internal successors, (1241), 841 states have internal predecessors, (1241), 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) [2021-11-19 05:02:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1241 transitions. [2021-11-19 05:02:50,140 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1241 transitions. Word has length 152 [2021-11-19 05:02:50,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:50,141 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1241 transitions. [2021-11-19 05:02:50,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:02:50,141 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1241 transitions. [2021-11-19 05:02:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 05:02:50,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:50,145 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:50,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-19 05:02:50,146 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:50,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:50,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1136294333, now seen corresponding path program 1 times [2021-11-19 05:02:50,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:50,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106450977] [2021-11-19 05:02:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:50,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:02:50,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:50,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106450977] [2021-11-19 05:02:50,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106450977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:50,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:50,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:50,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110095597] [2021-11-19 05:02:50,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:50,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:50,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:50,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:50,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:50,273 INFO L87 Difference]: Start difference. First operand 842 states and 1241 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:02:51,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:52,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:52,429 INFO L93 Difference]: Finished difference Result 1757 states and 2584 transitions. [2021-11-19 05:02:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:52,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-19 05:02:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:52,435 INFO L225 Difference]: With dead ends: 1757 [2021-11-19 05:02:52,435 INFO L226 Difference]: Without dead ends: 938 [2021-11-19 05:02:52,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:52,438 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 63 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:52,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 625 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 05:02:52,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-11-19 05:02:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 842. [2021-11-19 05:02:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.4720570749108204) internal successors, (1238), 841 states have internal predecessors, (1238), 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) [2021-11-19 05:02:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1238 transitions. [2021-11-19 05:02:52,483 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1238 transitions. Word has length 153 [2021-11-19 05:02:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:52,484 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1238 transitions. [2021-11-19 05:02:52,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:02:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1238 transitions. [2021-11-19 05:02:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 05:02:52,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:52,489 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:52,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-19 05:02:52,490 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:52,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:52,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1230543907, now seen corresponding path program 1 times [2021-11-19 05:02:52,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:52,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382051078] [2021-11-19 05:02:52,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:52,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:02:52,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:52,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382051078] [2021-11-19 05:02:52,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382051078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:52,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:52,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:52,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17040423] [2021-11-19 05:02:52,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:52,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:52,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:52,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:52,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:52,600 INFO L87 Difference]: Start difference. First operand 842 states and 1238 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:02:54,611 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:55,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:55,009 INFO L93 Difference]: Finished difference Result 1727 states and 2542 transitions. [2021-11-19 05:02:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:55,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-19 05:02:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:55,017 INFO L225 Difference]: With dead ends: 1727 [2021-11-19 05:02:55,017 INFO L226 Difference]: Without dead ends: 908 [2021-11-19 05:02:55,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:55,019 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 54 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:55,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 611 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:02:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-11-19 05:02:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 842. [2021-11-19 05:02:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.4684898929845422) internal successors, (1235), 841 states have internal predecessors, (1235), 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) [2021-11-19 05:02:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1235 transitions. [2021-11-19 05:02:55,061 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1235 transitions. Word has length 154 [2021-11-19 05:02:55,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:55,062 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1235 transitions. [2021-11-19 05:02:55,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:02:55,063 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1235 transitions. [2021-11-19 05:02:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 05:02:55,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:55,067 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:55,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-19 05:02:55,067 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:55,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:55,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2107584343, now seen corresponding path program 1 times [2021-11-19 05:02:55,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:55,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267337982] [2021-11-19 05:02:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:55,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:02:55,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:55,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267337982] [2021-11-19 05:02:55,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267337982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:55,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:55,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:55,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427801422] [2021-11-19 05:02:55,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:55,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:55,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:55,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:55,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:55,197 INFO L87 Difference]: Start difference. First operand 842 states and 1235 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:02:57,209 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:57,601 INFO L93 Difference]: Finished difference Result 1727 states and 2536 transitions. [2021-11-19 05:02:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:57,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-19 05:02:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:57,611 INFO L225 Difference]: With dead ends: 1727 [2021-11-19 05:02:57,611 INFO L226 Difference]: Without dead ends: 908 [2021-11-19 05:02:57,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:57,614 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 44 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:57,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 609 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 05:02:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-11-19 05:02:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 842. [2021-11-19 05:02:57,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.4649227110582639) internal successors, (1232), 841 states have internal predecessors, (1232), 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) [2021-11-19 05:02:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1232 transitions. [2021-11-19 05:02:57,662 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1232 transitions. Word has length 158 [2021-11-19 05:02:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:57,663 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1232 transitions. [2021-11-19 05:02:57,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:02:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1232 transitions. [2021-11-19 05:02:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-19 05:02:57,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:57,668 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:57,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-19 05:02:57,668 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:57,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2079173923, now seen corresponding path program 1 times [2021-11-19 05:02:57,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:57,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295037992] [2021-11-19 05:02:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:57,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 05:02:57,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:57,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295037992] [2021-11-19 05:02:57,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295037992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:57,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:57,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:02:57,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129418996] [2021-11-19 05:02:57,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:57,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:02:57,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:57,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:02:57,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:02:57,774 INFO L87 Difference]: Start difference. First operand 842 states and 1232 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:02:59,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:02:59,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:59,629 INFO L93 Difference]: Finished difference Result 1713 states and 2512 transitions. [2021-11-19 05:02:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:02:59,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-11-19 05:02:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:59,634 INFO L225 Difference]: With dead ends: 1713 [2021-11-19 05:02:59,634 INFO L226 Difference]: Without dead ends: 894 [2021-11-19 05:02:59,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:02:59,636 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 36 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:59,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 597 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 05:02:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-11-19 05:02:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 842. [2021-11-19 05:02:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.4613555291319857) internal successors, (1229), 841 states have internal predecessors, (1229), 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) [2021-11-19 05:02:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1229 transitions. [2021-11-19 05:02:59,674 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1229 transitions. Word has length 159 [2021-11-19 05:02:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:59,675 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1229 transitions. [2021-11-19 05:02:59,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:02:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1229 transitions. [2021-11-19 05:02:59,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 05:02:59,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:59,679 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:59,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-19 05:02:59,679 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:02:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:59,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1857611171, now seen corresponding path program 1 times [2021-11-19 05:02:59,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:59,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993025380] [2021-11-19 05:02:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:59,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 05:02:59,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:59,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993025380] [2021-11-19 05:02:59,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993025380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:02:59,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:02:59,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:02:59,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577490644] [2021-11-19 05:02:59,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:02:59,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:02:59,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:59,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:02:59,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:02:59,815 INFO L87 Difference]: Start difference. First operand 842 states and 1229 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2021-11-19 05:02:59,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:59,934 INFO L93 Difference]: Finished difference Result 1925 states and 2829 transitions. [2021-11-19 05:02:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:02:59,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-19 05:02:59,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:59,944 INFO L225 Difference]: With dead ends: 1925 [2021-11-19 05:02:59,944 INFO L226 Difference]: Without dead ends: 1106 [2021-11-19 05:02:59,946 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 [2021-11-19 05:02:59,946 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 156 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:59,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 378 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:02:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-11-19 05:02:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1106. [2021-11-19 05:02:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1105 states have (on average 1.4651583710407239) internal successors, (1619), 1105 states have internal predecessors, (1619), 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) [2021-11-19 05:02:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1619 transitions. [2021-11-19 05:02:59,996 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1619 transitions. Word has length 161 [2021-11-19 05:02:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:59,997 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1619 transitions. [2021-11-19 05:02:59,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2021-11-19 05:02:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1619 transitions. [2021-11-19 05:03:00,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-19 05:03:00,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:00,002 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:00,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-19 05:03:00,003 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:00,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2007752322, now seen corresponding path program 1 times [2021-11-19 05:03:00,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:00,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424836964] [2021-11-19 05:03:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:00,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-19 05:03:00,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:00,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424836964] [2021-11-19 05:03:00,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424836964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:00,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:00,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:03:00,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323766417] [2021-11-19 05:03:00,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:00,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:03:00,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:00,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:03:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:03:00,153 INFO L87 Difference]: Start difference. First operand 1106 states and 1619 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2021-11-19 05:03:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:00,287 INFO L93 Difference]: Finished difference Result 2453 states and 3609 transitions. [2021-11-19 05:03:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:03:00,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 167 [2021-11-19 05:03:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:00,299 INFO L225 Difference]: With dead ends: 2453 [2021-11-19 05:03:00,299 INFO L226 Difference]: Without dead ends: 1370 [2021-11-19 05:03:00,302 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 [2021-11-19 05:03:00,302 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:00,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 377 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:03:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-11-19 05:03:00,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1370. [2021-11-19 05:03:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 1.4682249817384954) internal successors, (2010), 1369 states have internal predecessors, (2010), 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) [2021-11-19 05:03:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 2010 transitions. [2021-11-19 05:03:00,379 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 2010 transitions. Word has length 167 [2021-11-19 05:03:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:00,380 INFO L470 AbstractCegarLoop]: Abstraction has 1370 states and 2010 transitions. [2021-11-19 05:03:00,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2021-11-19 05:03:00,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 2010 transitions. [2021-11-19 05:03:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-19 05:03:00,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:00,386 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:00,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-19 05:03:00,387 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:00,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1092865552, now seen corresponding path program 1 times [2021-11-19 05:03:00,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:00,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001337284] [2021-11-19 05:03:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:00,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 05:03:00,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:00,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001337284] [2021-11-19 05:03:00,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001337284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:00,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:00,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:03:00,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130105218] [2021-11-19 05:03:00,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:00,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:03:00,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:00,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:03:00,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:03:00,546 INFO L87 Difference]: Start difference. First operand 1370 states and 2010 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:00,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:00,711 INFO L93 Difference]: Finished difference Result 2981 states and 4391 transitions. [2021-11-19 05:03:00,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:03:00,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 199 [2021-11-19 05:03:00,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:00,733 INFO L225 Difference]: With dead ends: 2981 [2021-11-19 05:03:00,734 INFO L226 Difference]: Without dead ends: 1634 [2021-11-19 05:03:00,736 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 [2021-11-19 05:03:00,737 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:00,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 376 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:03:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2021-11-19 05:03:00,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1634. [2021-11-19 05:03:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 1.4709124311083894) internal successors, (2402), 1633 states have internal predecessors, (2402), 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) [2021-11-19 05:03:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2402 transitions. [2021-11-19 05:03:00,831 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2402 transitions. Word has length 199 [2021-11-19 05:03:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:00,832 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 2402 transitions. [2021-11-19 05:03:00,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2402 transitions. [2021-11-19 05:03:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-19 05:03:00,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:00,839 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:00,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-19 05:03:00,840 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash 737642714, now seen corresponding path program 1 times [2021-11-19 05:03:00,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:00,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821524436] [2021-11-19 05:03:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:00,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 05:03:00,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:00,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821524436] [2021-11-19 05:03:00,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821524436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:00,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:00,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:03:00,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653223850] [2021-11-19 05:03:00,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:00,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:03:00,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:00,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:03:00,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:03:00,980 INFO L87 Difference]: Start difference. First operand 1634 states and 2402 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:01,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:01,112 INFO L93 Difference]: Finished difference Result 3509 states and 5175 transitions. [2021-11-19 05:03:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:03:01,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-11-19 05:03:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:01,120 INFO L225 Difference]: With dead ends: 3509 [2021-11-19 05:03:01,121 INFO L226 Difference]: Without dead ends: 1898 [2021-11-19 05:03:01,123 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 [2021-11-19 05:03:01,124 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:01,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 375 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:03:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-11-19 05:03:01,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1898. [2021-11-19 05:03:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 1.4733790195044807) internal successors, (2795), 1897 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2795 transitions. [2021-11-19 05:03:01,244 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2795 transitions. Word has length 201 [2021-11-19 05:03:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:01,245 INFO L470 AbstractCegarLoop]: Abstraction has 1898 states and 2795 transitions. [2021-11-19 05:03:01,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2795 transitions. [2021-11-19 05:03:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-19 05:03:01,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:01,253 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:01,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-19 05:03:01,254 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:01,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1837426269, now seen corresponding path program 1 times [2021-11-19 05:03:01,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:01,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677332944] [2021-11-19 05:03:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:01,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 05:03:01,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:01,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677332944] [2021-11-19 05:03:01,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677332944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:01,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:01,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:03:01,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204859221] [2021-11-19 05:03:01,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:01,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:03:01,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:01,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:03:01,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:03:01,399 INFO L87 Difference]: Start difference. First operand 1898 states and 2795 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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) [2021-11-19 05:03:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:01,531 INFO L93 Difference]: Finished difference Result 4037 states and 5961 transitions. [2021-11-19 05:03:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:03:01,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 234 [2021-11-19 05:03:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:01,549 INFO L225 Difference]: With dead ends: 4037 [2021-11-19 05:03:01,550 INFO L226 Difference]: Without dead ends: 2162 [2021-11-19 05:03:01,553 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 [2021-11-19 05:03:01,556 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:01,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 374 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:03:01,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-11-19 05:03:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 2162. [2021-11-19 05:03:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 1.4757056918093476) internal successors, (3189), 2161 states have internal predecessors, (3189), 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) [2021-11-19 05:03:01,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 3189 transitions. [2021-11-19 05:03:01,738 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 3189 transitions. Word has length 234 [2021-11-19 05:03:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:01,739 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 3189 transitions. [2021-11-19 05:03:01,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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) [2021-11-19 05:03:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 3189 transitions. [2021-11-19 05:03:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-19 05:03:01,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:01,748 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:01,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-19 05:03:01,749 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:01,750 INFO L85 PathProgramCache]: Analyzing trace with hash -746542110, now seen corresponding path program 1 times [2021-11-19 05:03:01,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:01,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861930041] [2021-11-19 05:03:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:01,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-19 05:03:01,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:01,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861930041] [2021-11-19 05:03:01,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861930041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:01,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:01,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:03:01,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276355867] [2021-11-19 05:03:01,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:01,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:03:01,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:01,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:03:01,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:03:01,926 INFO L87 Difference]: Start difference. First operand 2162 states and 3189 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2021-11-19 05:03:02,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:02,114 INFO L93 Difference]: Finished difference Result 4560 states and 6742 transitions. [2021-11-19 05:03:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:03:02,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 269 [2021-11-19 05:03:02,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:02,123 INFO L225 Difference]: With dead ends: 4560 [2021-11-19 05:03:02,123 INFO L226 Difference]: Without dead ends: 2421 [2021-11-19 05:03:02,126 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 [2021-11-19 05:03:02,126 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 146 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:02,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 575 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:03:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2021-11-19 05:03:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2421. [2021-11-19 05:03:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 1.4743801652892563) internal successors, (3568), 2420 states have internal predecessors, (3568), 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) [2021-11-19 05:03:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 3568 transitions. [2021-11-19 05:03:02,230 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 3568 transitions. Word has length 269 [2021-11-19 05:03:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:02,230 INFO L470 AbstractCegarLoop]: Abstraction has 2421 states and 3568 transitions. [2021-11-19 05:03:02,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2021-11-19 05:03:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 3568 transitions. [2021-11-19 05:03:02,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-19 05:03:02,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:02,242 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:02,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-19 05:03:02,242 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:02,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1456242196, now seen corresponding path program 1 times [2021-11-19 05:03:02,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:02,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222829814] [2021-11-19 05:03:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:02,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-11-19 05:03:02,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:02,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222829814] [2021-11-19 05:03:02,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222829814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:02,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:02,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:03:02,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309563296] [2021-11-19 05:03:02,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:02,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:03:02,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:02,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:03:02,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:03:02,443 INFO L87 Difference]: Start difference. First operand 2421 states and 3568 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-11-19 05:03:02,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:02,637 INFO L93 Difference]: Finished difference Result 5083 states and 7507 transitions. [2021-11-19 05:03:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:03:02,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 308 [2021-11-19 05:03:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:02,647 INFO L225 Difference]: With dead ends: 5083 [2021-11-19 05:03:02,647 INFO L226 Difference]: Without dead ends: 2685 [2021-11-19 05:03:02,652 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 [2021-11-19 05:03:02,652 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:02,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 372 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:03:02,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-11-19 05:03:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2685. [2021-11-19 05:03:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2684 states have (on average 1.4769001490312965) internal successors, (3964), 2684 states have internal predecessors, (3964), 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) [2021-11-19 05:03:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 3964 transitions. [2021-11-19 05:03:02,794 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 3964 transitions. Word has length 308 [2021-11-19 05:03:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:02,795 INFO L470 AbstractCegarLoop]: Abstraction has 2685 states and 3964 transitions. [2021-11-19 05:03:02,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-11-19 05:03:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 3964 transitions. [2021-11-19 05:03:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-11-19 05:03:02,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:02,806 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:02,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-19 05:03:02,807 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:02,809 INFO L85 PathProgramCache]: Analyzing trace with hash -965961075, now seen corresponding path program 1 times [2021-11-19 05:03:02,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:02,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998456347] [2021-11-19 05:03:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:02,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 909 trivial. 0 not checked. [2021-11-19 05:03:03,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:03,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998456347] [2021-11-19 05:03:03,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998456347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:03,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:03,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:03:03,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32936724] [2021-11-19 05:03:03,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:03,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:03:03,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:03,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:03:03,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:03:03,049 INFO L87 Difference]: Start difference. First operand 2685 states and 3964 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:03,207 INFO L93 Difference]: Finished difference Result 2951 states and 4363 transitions. [2021-11-19 05:03:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:03:03,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 349 [2021-11-19 05:03:03,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:03,216 INFO L225 Difference]: With dead ends: 2951 [2021-11-19 05:03:03,216 INFO L226 Difference]: Without dead ends: 2949 [2021-11-19 05:03:03,217 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 [2021-11-19 05:03:03,218 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:03,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 371 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:03:03,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-11-19 05:03:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2949. [2021-11-19 05:03:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2948 states have (on average 1.4793080054274084) internal successors, (4361), 2948 states have internal predecessors, (4361), 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) [2021-11-19 05:03:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4361 transitions. [2021-11-19 05:03:03,368 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4361 transitions. Word has length 349 [2021-11-19 05:03:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:03,369 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 4361 transitions. [2021-11-19 05:03:03,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4361 transitions. [2021-11-19 05:03:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-19 05:03:03,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:03,378 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:03,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-19 05:03:03,379 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:03,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash -904105078, now seen corresponding path program 1 times [2021-11-19 05:03:03,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:03,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174747600] [2021-11-19 05:03:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:03,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 717 proven. 0 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2021-11-19 05:03:03,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:03,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174747600] [2021-11-19 05:03:03,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174747600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:03,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:03,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:03:03,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460299730] [2021-11-19 05:03:03,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:03,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:03:03,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:03,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:03:03,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:03,736 INFO L87 Difference]: Start difference. First operand 2949 states and 4361 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:05,748 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:03:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:06,570 INFO L93 Difference]: Finished difference Result 7029 states and 10449 transitions. [2021-11-19 05:03:06,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:03:06,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2021-11-19 05:03:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:06,585 INFO L225 Difference]: With dead ends: 7029 [2021-11-19 05:03:06,585 INFO L226 Difference]: Without dead ends: 4103 [2021-11-19 05:03:06,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:03:06,592 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 98 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:06,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 713 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 282 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 05:03:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2021-11-19 05:03:06,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 3400. [2021-11-19 05:03:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3400 states, 3399 states have (on average 1.5257428655486909) internal successors, (5186), 3399 states have internal predecessors, (5186), 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) [2021-11-19 05:03:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 5186 transitions. [2021-11-19 05:03:06,806 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 5186 transitions. Word has length 392 [2021-11-19 05:03:06,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:06,807 INFO L470 AbstractCegarLoop]: Abstraction has 3400 states and 5186 transitions. [2021-11-19 05:03:06,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 5186 transitions. [2021-11-19 05:03:06,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-19 05:03:06,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:06,820 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:06,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-19 05:03:06,820 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:06,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:06,821 INFO L85 PathProgramCache]: Analyzing trace with hash 42932808, now seen corresponding path program 1 times [2021-11-19 05:03:06,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:06,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098300139] [2021-11-19 05:03:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:06,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2021-11-19 05:03:07,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:07,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098300139] [2021-11-19 05:03:07,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098300139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:07,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:07,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:03:07,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938648223] [2021-11-19 05:03:07,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:07,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:03:07,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:07,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:03:07,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:03:07,899 INFO L87 Difference]: Start difference. First operand 3400 states and 5186 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2021-11-19 05:03:09,913 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:03:11,939 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:03:12,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:12,582 INFO L93 Difference]: Finished difference Result 6797 states and 10368 transitions. [2021-11-19 05:03:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:03:12,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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 392 [2021-11-19 05:03:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:12,595 INFO L225 Difference]: With dead ends: 6797 [2021-11-19 05:03:12,596 INFO L226 Difference]: Without dead ends: 3400 [2021-11-19 05:03:12,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:03:12,603 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 7 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:12,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 695 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 05:03:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2021-11-19 05:03:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3400. [2021-11-19 05:03:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3400 states, 3399 states have (on average 1.5254486613709914) internal successors, (5185), 3399 states have internal predecessors, (5185), 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) [2021-11-19 05:03:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 5185 transitions. [2021-11-19 05:03:12,812 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 5185 transitions. Word has length 392 [2021-11-19 05:03:12,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:12,813 INFO L470 AbstractCegarLoop]: Abstraction has 3400 states and 5185 transitions. [2021-11-19 05:03:12,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2021-11-19 05:03:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 5185 transitions. [2021-11-19 05:03:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-19 05:03:12,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:12,830 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:12,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-19 05:03:12,831 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:12,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:12,832 INFO L85 PathProgramCache]: Analyzing trace with hash -729601146, now seen corresponding path program 1 times [2021-11-19 05:03:12,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:12,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969662553] [2021-11-19 05:03:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:12,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 594 proven. 771 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-19 05:03:16,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:16,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969662553] [2021-11-19 05:03:16,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969662553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:03:16,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483463658] [2021-11-19 05:03:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:16,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:16,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:03:16,698 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:03:16,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:03:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:17,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-19 05:03:17,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:17,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:17,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:17,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:17,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:17,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:17,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:17,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2564 treesize of output 2561 [2021-11-19 05:03:18,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-19 05:03:18,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:03:18,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-19 05:03:18,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557171211] [2021-11-19 05:03:18,010 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 05:03:18,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 05:03:18,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 05:03:18,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:03:18,016 INFO L87 Difference]: Start difference. First operand 3400 states and 5185 transitions. Second operand has 22 states, 22 states have (on average 15.136363636363637) internal successors, (333), 22 states have internal predecessors, (333), 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) [2021-11-19 05:03:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 05:03:18,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:03:18,018 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:18,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:03:18,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:18,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:18,229 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@561977b5 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-19 05:03:18,234 INFO L158 Benchmark]: Toolchain (without parser) took 143967.15ms. Allocated memory was 107.0MB in the beginning and 318.8MB in the end (delta: 211.8MB). Free memory was 65.9MB in the beginning and 212.7MB in the end (delta: -146.8MB). Peak memory consumption was 65.8MB. Max. memory is 16.1GB. [2021-11-19 05:03:18,234 INFO L158 Benchmark]: CDTParser took 0.46ms. Allocated memory is still 107.0MB. Free memory was 84.5MB in the beginning and 84.5MB in the end (delta: 69.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 05:03:18,234 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1196.39ms. Allocated memory is still 107.0MB. Free memory was 65.7MB in the beginning and 61.3MB in the end (delta: 4.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 05:03:18,235 INFO L158 Benchmark]: Boogie Procedure Inliner took 164.98ms. Allocated memory is still 107.0MB. Free memory was 61.3MB in the beginning and 56.3MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-19 05:03:18,235 INFO L158 Benchmark]: Boogie Preprocessor took 113.71ms. Allocated memory is still 107.0MB. Free memory was 56.3MB in the beginning and 49.0MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 05:03:18,238 INFO L158 Benchmark]: RCFGBuilder took 3178.99ms. Allocated memory was 107.0MB in the beginning and 165.7MB in the end (delta: 58.7MB). Free memory was 49.0MB in the beginning and 111.4MB in the end (delta: -62.4MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. [2021-11-19 05:03:18,238 INFO L158 Benchmark]: TraceAbstraction took 139303.87ms. Allocated memory was 165.7MB in the beginning and 318.8MB in the end (delta: 153.1MB). Free memory was 110.5MB in the beginning and 212.7MB in the end (delta: -102.1MB). Peak memory consumption was 51.3MB. Max. memory is 16.1GB. [2021-11-19 05:03:18,241 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46ms. Allocated memory is still 107.0MB. Free memory was 84.5MB in the beginning and 84.5MB in the end (delta: 69.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1196.39ms. Allocated memory is still 107.0MB. Free memory was 65.7MB in the beginning and 61.3MB in the end (delta: 4.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 164.98ms. Allocated memory is still 107.0MB. Free memory was 61.3MB in the beginning and 56.3MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 113.71ms. Allocated memory is still 107.0MB. Free memory was 56.3MB in the beginning and 49.0MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 3178.99ms. Allocated memory was 107.0MB in the beginning and 165.7MB in the end (delta: 58.7MB). Free memory was 49.0MB in the beginning and 111.4MB in the end (delta: -62.4MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. * TraceAbstraction took 139303.87ms. Allocated memory was 165.7MB in the beginning and 318.8MB in the end (delta: 153.1MB). Free memory was 110.5MB in the beginning and 212.7MB in the end (delta: -102.1MB). Peak memory consumption was 51.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@561977b5 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@561977b5: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-19 05:03:18,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL --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 64affc32c9ee6b1616cdbc82208fa978b35ea8d8fb3017d6636bda9ef421e017 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:03:21,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:03:21,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:03:22,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:03:22,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:03:22,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:03:22,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:03:22,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:03:22,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:03:22,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:03:22,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:03:22,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:03:22,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:03:22,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:03:22,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:03:22,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:03:22,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:03:22,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:03:22,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:03:22,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:03:22,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:03:22,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:03:22,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:03:22,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:03:22,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:03:22,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:03:22,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:03:22,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:03:22,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:03:22,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:03:22,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:03:22,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:03:22,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:03:22,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:03:22,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:03:22,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:03:22,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:03:22,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:03:22,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:03:22,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:03:22,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:03:22,140 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-19 05:03:22,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:03:22,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:03:22,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:03:22,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:03:22,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:03:22,204 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:03:22,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:03:22,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:03:22,208 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:03:22,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:03:22,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:03:22,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:03:22,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:03:22,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:03:22,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:03:22,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:03:22,213 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 05:03:22,213 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 05:03:22,214 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:03:22,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:03:22,215 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:03:22,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:03:22,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:03:22,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:03:22,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:03:22,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:03:22,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:03:22,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:03:22,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:03:22,219 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-19 05:03:22,220 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 05:03:22,220 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:03:22,221 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:03:22,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:03:22,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:03:22,222 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 05:03:22,222 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64affc32c9ee6b1616cdbc82208fa978b35ea8d8fb3017d6636bda9ef421e017 [2021-11-19 05:03:22,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:03:22,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:03:22,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:03:22,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:03:22,806 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:03:22,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c [2021-11-19 05:03:22,909 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/data/05e858172/9b2cf8310add4eb4ab1e37b98250a029/FLAGb5c426a23 [2021-11-19 05:03:23,952 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:03:23,953 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c [2021-11-19 05:03:24,003 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/data/05e858172/9b2cf8310add4eb4ab1e37b98250a029/FLAGb5c426a23 [2021-11-19 05:03:24,446 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/data/05e858172/9b2cf8310add4eb4ab1e37b98250a029 [2021-11-19 05:03:24,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:03:24,453 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:03:24,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:03:24,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:03:24,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:03:24,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:24" (1/1) ... [2021-11-19 05:03:24,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b052791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:24, skipping insertion in model container [2021-11-19 05:03:24,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:24" (1/1) ... [2021-11-19 05:03:24,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:03:24,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:03:25,326 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_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c[75436,75449] [2021-11-19 05:03:25,344 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:03:25,403 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:03:25,682 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_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c[75436,75449] [2021-11-19 05:03:25,688 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:03:25,717 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:03:25,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:25 WrapperNode [2021-11-19 05:03:25,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:03:25,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:03:25,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:03:25,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:03:25,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:25" (1/1) ... [2021-11-19 05:03:25,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:25" (1/1) ... [2021-11-19 05:03:25,947 INFO L137 Inliner]: procedures = 36, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 767 [2021-11-19 05:03:25,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:03:25,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:03:25,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:03:25,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:03:25,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:25" (1/1) ... [2021-11-19 05:03:25,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:25" (1/1) ... [2021-11-19 05:03:25,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:25" (1/1) ... [2021-11-19 05:03:25,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:25" (1/1) ... [2021-11-19 05:03:26,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:25" (1/1) ... [2021-11-19 05:03:26,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:25" (1/1) ... [2021-11-19 05:03:26,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:25" (1/1) ... [2021-11-19 05:03:26,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:03:26,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:03:26,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:03:26,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:03:26,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:25" (1/1) ... [2021-11-19 05:03:26,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:03:26,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:03:26,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:03:26,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:03:26,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:03:26,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 05:03:26,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 05:03:26,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:03:26,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 05:03:26,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 05:03:26,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 05:03:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:03:26,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:03:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 05:03:26,638 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:03:26,641 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:03:26,677 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 05:03:32,091 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 05:03:32,092 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 05:03:32,092 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:03:32,114 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:03:32,115 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 05:03:32,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:03:32 BoogieIcfgContainer [2021-11-19 05:03:32,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:03:32,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:03:32,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:03:32,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:03:32,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:03:24" (1/3) ... [2021-11-19 05:03:32,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e215b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:03:32, skipping insertion in model container [2021-11-19 05:03:32,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:25" (2/3) ... [2021-11-19 05:03:32,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e215b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:03:32, skipping insertion in model container [2021-11-19 05:03:32,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:03:32" (3/3) ... [2021-11-19 05:03:32,132 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.12.i.cil-2.c [2021-11-19 05:03:32,152 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:03:32,155 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:03:32,260 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:03:32,279 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 [2021-11-19 05:03:32,280 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:03:32,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 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) [2021-11-19 05:03:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 05:03:32,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:32,321 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] [2021-11-19 05:03:32,322 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:32,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:32,330 INFO L85 PathProgramCache]: Analyzing trace with hash 918515972, now seen corresponding path program 1 times [2021-11-19 05:03:32,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:03:32,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295633671] [2021-11-19 05:03:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:32,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:03:32,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:03:32,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:03:32,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 05:03:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:32,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:03:32,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:03:33,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:03:33,726 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:03:33,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295633671] [2021-11-19 05:03:33,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295633671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:33,728 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:33,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 05:03:33,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726473215] [2021-11-19 05:03:33,732 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:33,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:03:33,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:03:33,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:03:33,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:33,780 INFO L87 Difference]: Start difference. First operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2021-11-19 05:03:34,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:34,246 INFO L93 Difference]: Finished difference Result 574 states and 984 transitions. [2021-11-19 05:03:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:03:34,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 44 [2021-11-19 05:03:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:34,267 INFO L225 Difference]: With dead ends: 574 [2021-11-19 05:03:34,267 INFO L226 Difference]: Without dead ends: 392 [2021-11-19 05:03:34,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:34,278 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 392 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:34,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 672 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:03:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-19 05:03:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2021-11-19 05:03:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.5319693094629157) internal successors, (599), 391 states have internal predecessors, (599), 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) [2021-11-19 05:03:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 599 transitions. [2021-11-19 05:03:34,433 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 599 transitions. Word has length 44 [2021-11-19 05:03:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:34,434 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 599 transitions. [2021-11-19 05:03:34,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2021-11-19 05:03:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 599 transitions. [2021-11-19 05:03:34,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 05:03:34,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:34,458 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:34,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:34,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:03:34,672 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:34,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:34,674 INFO L85 PathProgramCache]: Analyzing trace with hash 85239560, now seen corresponding path program 1 times [2021-11-19 05:03:34,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:03:34,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423115501] [2021-11-19 05:03:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:34,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:03:34,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:03:34,679 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:03:34,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 05:03:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:35,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:03:35,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:03:35,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:03:36,266 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:03:36,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423115501] [2021-11-19 05:03:36,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423115501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:36,268 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:36,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 05:03:36,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703279826] [2021-11-19 05:03:36,269 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:36,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:03:36,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:03:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:03:36,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:36,282 INFO L87 Difference]: Start difference. First operand 392 states and 599 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:36,763 INFO L93 Difference]: Finished difference Result 897 states and 1389 transitions. [2021-11-19 05:03:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:03:36,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-19 05:03:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:36,773 INFO L225 Difference]: With dead ends: 897 [2021-11-19 05:03:36,774 INFO L226 Difference]: Without dead ends: 642 [2021-11-19 05:03:36,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:36,780 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 303 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:36,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 721 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:03:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-19 05:03:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2021-11-19 05:03:36,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.5241809672386895) internal successors, (977), 641 states have internal predecessors, (977), 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) [2021-11-19 05:03:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 977 transitions. [2021-11-19 05:03:36,865 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 977 transitions. Word has length 104 [2021-11-19 05:03:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:36,867 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 977 transitions. [2021-11-19 05:03:36,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 977 transitions. [2021-11-19 05:03:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-19 05:03:36,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:36,886 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:36,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:37,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:03:37,099 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:37,101 INFO L85 PathProgramCache]: Analyzing trace with hash -19862405, now seen corresponding path program 1 times [2021-11-19 05:03:37,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:03:37,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729923155] [2021-11-19 05:03:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:37,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:03:37,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:03:37,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:03:37,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 05:03:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:37,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:03:37,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 05:03:38,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 05:03:39,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:03:39,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729923155] [2021-11-19 05:03:39,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729923155] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:39,391 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:39,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 05:03:39,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795402051] [2021-11-19 05:03:39,392 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:39,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:03:39,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:03:39,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:03:39,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:39,397 INFO L87 Difference]: Start difference. First operand 642 states and 977 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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) [2021-11-19 05:03:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:39,852 INFO L93 Difference]: Finished difference Result 1400 states and 2148 transitions. [2021-11-19 05:03:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:03:39,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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 167 [2021-11-19 05:03:39,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:39,862 INFO L225 Difference]: With dead ends: 1400 [2021-11-19 05:03:39,863 INFO L226 Difference]: Without dead ends: 895 [2021-11-19 05:03:39,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:39,867 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 303 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:39,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 727 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:03:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-11-19 05:03:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2021-11-19 05:03:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 1.5190156599552573) internal successors, (1358), 894 states have internal predecessors, (1358), 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) [2021-11-19 05:03:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1358 transitions. [2021-11-19 05:03:39,919 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1358 transitions. Word has length 167 [2021-11-19 05:03:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:39,920 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1358 transitions. [2021-11-19 05:03:39,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 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) [2021-11-19 05:03:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1358 transitions. [2021-11-19 05:03:39,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-19 05:03:39,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:39,928 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:39,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:40,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:03:40,144 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:40,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:40,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1844926231, now seen corresponding path program 1 times [2021-11-19 05:03:40,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:03:40,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462810280] [2021-11-19 05:03:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:40,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:03:40,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:03:40,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:03:40,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 05:03:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:40,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:03:40,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-19 05:03:41,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-19 05:03:42,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:03:42,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462810280] [2021-11-19 05:03:42,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462810280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:42,749 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:42,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 05:03:42,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105911085] [2021-11-19 05:03:42,750 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:42,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:03:42,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:03:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:03:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:42,752 INFO L87 Difference]: Start difference. First operand 895 states and 1358 transitions. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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) [2021-11-19 05:03:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:43,189 INFO L93 Difference]: Finished difference Result 1904 states and 2905 transitions. [2021-11-19 05:03:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:03:43,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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 230 [2021-11-19 05:03:43,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:43,202 INFO L225 Difference]: With dead ends: 1904 [2021-11-19 05:03:43,203 INFO L226 Difference]: Without dead ends: 1146 [2021-11-19 05:03:43,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:43,207 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 311 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:43,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 725 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:03:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-11-19 05:03:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1146. [2021-11-19 05:03:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 1.514410480349345) internal successors, (1734), 1145 states have internal predecessors, (1734), 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) [2021-11-19 05:03:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1734 transitions. [2021-11-19 05:03:43,284 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1734 transitions. Word has length 230 [2021-11-19 05:03:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:43,285 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 1734 transitions. [2021-11-19 05:03:43,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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) [2021-11-19 05:03:43,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1734 transitions. [2021-11-19 05:03:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-19 05:03:43,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:43,296 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:43,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:43,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:03:43,518 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1007722868, now seen corresponding path program 1 times [2021-11-19 05:03:43,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:03:43,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290056352] [2021-11-19 05:03:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:43,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:03:43,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:03:43,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:03:43,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 05:03:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:44,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:03:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-19 05:03:45,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-19 05:03:46,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:03:46,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290056352] [2021-11-19 05:03:46,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290056352] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:46,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:46,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 05:03:46,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406403758] [2021-11-19 05:03:46,612 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:46,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:03:46,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:03:46,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:03:46,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:46,614 INFO L87 Difference]: Start difference. First operand 1146 states and 1734 transitions. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:47,085 INFO L93 Difference]: Finished difference Result 2409 states and 3659 transitions. [2021-11-19 05:03:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:03:47,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2021-11-19 05:03:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:47,101 INFO L225 Difference]: With dead ends: 2409 [2021-11-19 05:03:47,102 INFO L226 Difference]: Without dead ends: 1400 [2021-11-19 05:03:47,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:47,113 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 315 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:47,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 728 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:03:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-19 05:03:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1400. [2021-11-19 05:03:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 1.5096497498213008) internal successors, (2112), 1399 states have internal predecessors, (2112), 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) [2021-11-19 05:03:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 2112 transitions. [2021-11-19 05:03:47,240 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 2112 transitions. Word has length 294 [2021-11-19 05:03:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:47,241 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 2112 transitions. [2021-11-19 05:03:47,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:03:47,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 2112 transitions. [2021-11-19 05:03:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-11-19 05:03:47,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:47,256 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:47,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:47,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:03:47,469 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1828138848, now seen corresponding path program 1 times [2021-11-19 05:03:47,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:03:47,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26362657] [2021-11-19 05:03:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:47,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:03:47,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:03:47,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:03:47,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 05:03:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:48,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:03:48,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 696 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-19 05:03:49,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 696 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-19 05:03:50,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:03:50,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26362657] [2021-11-19 05:03:50,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26362657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:50,612 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:50,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 05:03:50,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334258548] [2021-11-19 05:03:50,613 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:50,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:03:50,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:03:50,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:03:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:50,616 INFO L87 Difference]: Start difference. First operand 1400 states and 2112 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 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) [2021-11-19 05:03:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:51,114 INFO L93 Difference]: Finished difference Result 2914 states and 4408 transitions. [2021-11-19 05:03:51,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:03:51,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 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 358 [2021-11-19 05:03:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:51,133 INFO L225 Difference]: With dead ends: 2914 [2021-11-19 05:03:51,133 INFO L226 Difference]: Without dead ends: 1651 [2021-11-19 05:03:51,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 712 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:03:51,141 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 317 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:51,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 729 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:03:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-11-19 05:03:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1651. [2021-11-19 05:03:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 1.5054545454545454) internal successors, (2484), 1650 states have internal predecessors, (2484), 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) [2021-11-19 05:03:51,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2484 transitions. [2021-11-19 05:03:51,261 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2484 transitions. Word has length 358 [2021-11-19 05:03:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:51,262 INFO L470 AbstractCegarLoop]: Abstraction has 1651 states and 2484 transitions. [2021-11-19 05:03:51,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 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) [2021-11-19 05:03:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2484 transitions. [2021-11-19 05:03:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-19 05:03:51,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:51,276 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:51,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:51,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:03:51,501 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:03:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:51,502 INFO L85 PathProgramCache]: Analyzing trace with hash -152438136, now seen corresponding path program 1 times [2021-11-19 05:03:51,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:03:51,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315419234] [2021-11-19 05:03:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:51,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:03:51,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:03:51,508 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:03:51,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 05:03:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:52,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 05:03:52,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:52,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 05:03:52,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 05:03:53,243 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-19 05:03:53,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 41 [2021-11-19 05:03:53,303 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-19 05:03:53,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-11-19 05:03:53,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:53,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:53,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:53,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2021-11-19 05:03:53,530 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-19 05:03:53,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-11-19 05:03:53,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:03:53,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-19 05:03:53,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-19 05:03:53,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-19 05:03:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2021-11-19 05:03:55,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2021-11-19 05:03:57,696 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:03:57,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315419234] [2021-11-19 05:03:57,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315419234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:03:57,697 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:03:57,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 05:03:57,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519692628] [2021-11-19 05:03:57,698 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:03:57,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 05:03:57,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:03:57,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 05:03:57,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:03:57,701 INFO L87 Difference]: Start difference. First operand 1651 states and 2484 transitions. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 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) [2021-11-19 05:03:59,728 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:04:01,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:04:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:04:06,976 INFO L93 Difference]: Finished difference Result 3299 states and 4964 transitions. [2021-11-19 05:04:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:04:06,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 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 392 [2021-11-19 05:04:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:04:06,994 INFO L225 Difference]: With dead ends: 3299 [2021-11-19 05:04:06,995 INFO L226 Difference]: Without dead ends: 1651 [2021-11-19 05:04:07,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 775 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:04:07,005 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 12 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:04:07,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 852 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 2 Unknown, 60 Unchecked, 9.0s Time] [2021-11-19 05:04:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-11-19 05:04:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1651. [2021-11-19 05:04:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 1.5048484848484849) internal successors, (2483), 1650 states have internal predecessors, (2483), 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) [2021-11-19 05:04:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2483 transitions. [2021-11-19 05:04:07,124 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2483 transitions. Word has length 392 [2021-11-19 05:04:07,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:04:07,125 INFO L470 AbstractCegarLoop]: Abstraction has 1651 states and 2483 transitions. [2021-11-19 05:04:07,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 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) [2021-11-19 05:04:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2483 transitions. [2021-11-19 05:04:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-19 05:04:07,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:04:07,141 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:04:07,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:04:07,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:04:07,355 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:04:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:07,356 INFO L85 PathProgramCache]: Analyzing trace with hash -924972090, now seen corresponding path program 1 times [2021-11-19 05:04:07,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:04:07,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422358940] [2021-11-19 05:04:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:07,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:04:07,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:04:07,361 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:04:07,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 05:04:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:08,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:04:08,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:04:08,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 05:04:08,806 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-19 05:04:08,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-19 05:04:09,313 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 05:04:09,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-19 05:04:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 451 proven. 0 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2021-11-19 05:04:10,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:04:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 451 proven. 0 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2021-11-19 05:04:12,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:04:12,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422358940] [2021-11-19 05:04:12,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422358940] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:04:12,674 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:04:12,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 05:04:12,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330086515] [2021-11-19 05:04:12,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:04:12,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:04:12,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:04:12,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:04:12,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:04:12,679 INFO L87 Difference]: Start difference. First operand 1651 states and 2483 transitions. Second operand has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 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) [2021-11-19 05:04:14,719 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:04:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:04:27,285 INFO L93 Difference]: Finished difference Result 6246 states and 9434 transitions. [2021-11-19 05:04:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:04:27,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 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 392 [2021-11-19 05:04:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:04:27,323 INFO L225 Difference]: With dead ends: 6246 [2021-11-19 05:04:27,323 INFO L226 Difference]: Without dead ends: 4605 [2021-11-19 05:04:27,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 776 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:04:27,328 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 396 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 88 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:04:27,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 836 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 724 Invalid, 1 Unknown, 0 Unchecked, 14.3s Time] [2021-11-19 05:04:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-11-19 05:04:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 1975. [2021-11-19 05:04:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 1.5405268490374873) internal successors, (3041), 1974 states have internal predecessors, (3041), 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) [2021-11-19 05:04:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3041 transitions. [2021-11-19 05:04:27,512 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3041 transitions. Word has length 392 [2021-11-19 05:04:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:04:27,512 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 3041 transitions. [2021-11-19 05:04:27,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 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) [2021-11-19 05:04:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3041 transitions. [2021-11-19 05:04:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-19 05:04:27,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:04:27,527 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:04:27,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:04:27,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:04:27,752 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:04:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:27,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1676639032, now seen corresponding path program 1 times [2021-11-19 05:04:27,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:04:27,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638707569] [2021-11-19 05:04:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:27,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:04:27,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:04:27,757 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:04:27,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 05:04:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:28,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:04:28,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:04:29,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 05:04:29,601 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-19 05:04:29,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-19 05:04:30,479 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 05:04:30,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-19 05:04:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 717 proven. 0 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2021-11-19 05:04:30,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:04:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 717 proven. 0 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2021-11-19 05:04:32,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 05:04:32,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638707569] [2021-11-19 05:04:32,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638707569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 05:04:32,292 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:04:32,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 05:04:32,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631113278] [2021-11-19 05:04:32,293 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 05:04:32,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:04:32,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 05:04:32,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:04:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:04:32,296 INFO L87 Difference]: Start difference. First operand 1975 states and 3041 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) [2021-11-19 05:04:34,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:04:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:04:46,088 INFO L93 Difference]: Finished difference Result 8293 states and 12727 transitions. [2021-11-19 05:04:46,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:04:46,090 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 392 [2021-11-19 05:04:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:04:46,143 INFO L225 Difference]: With dead ends: 8293 [2021-11-19 05:04:46,143 INFO L226 Difference]: Without dead ends: 6328 [2021-11-19 05:04:46,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 776 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:04:46,149 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 356 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 85 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:04:46,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 880 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 777 Invalid, 1 Unknown, 0 Unchecked, 13.4s Time] [2021-11-19 05:04:46,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6328 states. [2021-11-19 05:04:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6328 to 2807. [2021-11-19 05:04:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2806 states have (on average 1.6190306486101211) internal successors, (4543), 2806 states have internal predecessors, (4543), 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) [2021-11-19 05:04:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 4543 transitions. [2021-11-19 05:04:46,467 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 4543 transitions. Word has length 392 [2021-11-19 05:04:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:04:46,469 INFO L470 AbstractCegarLoop]: Abstraction has 2807 states and 4543 transitions. [2021-11-19 05:04:46,469 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) [2021-11-19 05:04:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 4543 transitions. [2021-11-19 05:04:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-19 05:04:46,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:04:46,486 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:04:46,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:04:46,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 05:04:46,700 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:04:46,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:46,701 INFO L85 PathProgramCache]: Analyzing trace with hash -729601146, now seen corresponding path program 1 times [2021-11-19 05:04:46,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 05:04:46,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891793265] [2021-11-19 05:04:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:46,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 05:04:46,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 05:04:46,705 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 05:04:46,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb6ef3c-b483-433b-985d-2f0f59d8dd3d/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 05:04:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:51,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-19 05:04:51,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:06:34,377 WARN L227 SmtUtils]: Spent 1.71m on a formula simplification. DAG size of input: 66 DAG size of output: 15 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 05:06:34,378 INFO L354 Elim1Store]: treesize reduction 200, result has 14.2 percent of original size [2021-11-19 05:06:34,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 1970 treesize of output 1981 [2021-11-19 05:06:34,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:06:34,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:06:34,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:06:34,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:06:34,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:06:34,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:06:34,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:06:34,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:06:34,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:06:34,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:06:34,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 1963 treesize of output 1960 [2021-11-19 05:06:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver