./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label23.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_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/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_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label23.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/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_a548d56c-0b48-4b14-8a1a-b35670cb916d/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 adf96f71bf2a13ae5fd22bce01b9c481e5a9d21572a73a17cea58c8fcaecb44e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:25:03,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:25:03,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:25:03,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:25:03,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:25:03,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:25:03,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:25:03,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:25:03,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:25:03,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:25:03,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:25:03,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:25:03,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:25:03,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:25:03,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:25:03,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:25:03,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:25:03,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:25:03,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:25:03,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:25:03,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:25:03,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:25:03,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:25:03,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:25:03,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:25:03,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:25:03,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:25:03,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:25:03,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:25:03,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:25:03,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:25:03,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:25:03,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:25:03,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:25:03,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:25:03,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:25:03,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:25:03,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:25:03,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:25:03,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:25:03,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:25:03,914 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:25:03,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:25:03,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:25:03,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:25:03,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:25:03,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:25:03,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:25:03,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:25:03,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:25:03,949 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:25:03,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:25:03,950 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:25:03,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:25:03,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:25:03,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:25:03,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:25:03,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:25:03,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:25:03,952 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:25:03,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:25:03,953 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:25:03,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:25:03,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:25:03,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:25:03,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:25:03,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:25:03,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:25:03,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:25:03,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:25:03,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:25:03,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:25:03,957 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:25:03,957 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:25:03,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:25:03,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:25:03,958 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_a548d56c-0b48-4b14-8a1a-b35670cb916d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf96f71bf2a13ae5fd22bce01b9c481e5a9d21572a73a17cea58c8fcaecb44e [2021-11-19 05:25:04,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:25:04,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:25:04,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:25:04,438 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:25:04,439 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:25:04,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/eca-rers2012/Problem13_label23.c [2021-11-19 05:25:04,534 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/data/b574083d4/fb8f8ee86e4741c393e0b8e273a4e6f9/FLAG5822f348a [2021-11-19 05:25:05,493 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:25:05,499 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/sv-benchmarks/c/eca-rers2012/Problem13_label23.c [2021-11-19 05:25:05,551 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/data/b574083d4/fb8f8ee86e4741c393e0b8e273a4e6f9/FLAG5822f348a [2021-11-19 05:25:05,978 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/data/b574083d4/fb8f8ee86e4741c393e0b8e273a4e6f9 [2021-11-19 05:25:05,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:25:05,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:25:05,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:25:05,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:25:05,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:25:05,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:25:05" (1/1) ... [2021-11-19 05:25:05,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0782e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:05, skipping insertion in model container [2021-11-19 05:25:05,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:25:05" (1/1) ... [2021-11-19 05:25:05,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:25:06,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:25:06,565 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_a548d56c-0b48-4b14-8a1a-b35670cb916d/sv-benchmarks/c/eca-rers2012/Problem13_label23.c[2192,2205] [2021-11-19 05:25:07,848 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:25:07,858 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:25:07,891 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_a548d56c-0b48-4b14-8a1a-b35670cb916d/sv-benchmarks/c/eca-rers2012/Problem13_label23.c[2192,2205] [2021-11-19 05:25:08,589 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:25:08,618 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:25:08,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:08 WrapperNode [2021-11-19 05:25:08,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:25:08,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:25:08,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:25:08,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:25:08,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:08" (1/1) ... [2021-11-19 05:25:08,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:08" (1/1) ... [2021-11-19 05:25:09,572 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-19 05:25:09,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:25:09,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:25:09,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:25:09,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:25:09,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:08" (1/1) ... [2021-11-19 05:25:09,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:08" (1/1) ... [2021-11-19 05:25:09,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:08" (1/1) ... [2021-11-19 05:25:09,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:08" (1/1) ... [2021-11-19 05:25:10,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:08" (1/1) ... [2021-11-19 05:25:10,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:08" (1/1) ... [2021-11-19 05:25:10,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:08" (1/1) ... [2021-11-19 05:25:10,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:25:10,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:25:10,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:25:10,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:25:10,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:08" (1/1) ... [2021-11-19 05:25:10,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:25:10,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:10,517 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:25:10,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:25:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:25:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:25:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:25:10,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:25:10,772 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:25:10,774 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:25:17,112 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:25:17,149 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:25:17,149 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 05:25:17,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:25:17 BoogieIcfgContainer [2021-11-19 05:25:17,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:25:17,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:25:17,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:25:17,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:25:17,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:25:05" (1/3) ... [2021-11-19 05:25:17,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23637304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:25:17, skipping insertion in model container [2021-11-19 05:25:17,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:08" (2/3) ... [2021-11-19 05:25:17,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23637304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:25:17, skipping insertion in model container [2021-11-19 05:25:17,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:25:17" (3/3) ... [2021-11-19 05:25:17,169 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label23.c [2021-11-19 05:25:17,177 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:25:17,177 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:25:17,261 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:25:17,271 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 05:25:17,271 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:25:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 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 05:25:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 05:25:17,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:17,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:17,338 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash -461255479, now seen corresponding path program 1 times [2021-11-19 05:25:17,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:17,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912611886] [2021-11-19 05:25:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:17,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:17,562 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 05:25:17,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:17,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912611886] [2021-11-19 05:25:17,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912611886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:17,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:17,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:25:17,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075966189] [2021-11-19 05:25:17,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:17,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:17,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:17,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:25:17,623 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 05:25:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:23,780 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-11-19 05:25:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:23,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-19 05:25:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:23,825 INFO L225 Difference]: With dead ends: 3160 [2021-11-19 05:25:23,826 INFO L226 Difference]: Without dead ends: 1983 [2021-11-19 05:25:23,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:25:23,842 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1090 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:23,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1090 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-11-19 05:25:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-11-19 05:25:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-11-19 05:25:23,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 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 05:25:23,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-11-19 05:25:23,995 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 13 [2021-11-19 05:25:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:23,996 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-11-19 05:25:23,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 05:25:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-11-19 05:25:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 05:25:24,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:24,001 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:24,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:25:24,002 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash 365234242, now seen corresponding path program 1 times [2021-11-19 05:25:24,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:24,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140245134] [2021-11-19 05:25:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:24,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:24,257 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 05:25:24,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:24,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140245134] [2021-11-19 05:25:24,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140245134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:24,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:24,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:25:24,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540100850] [2021-11-19 05:25:24,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:24,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:24,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:24,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:25:24,262 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 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 05:25:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:28,527 INFO L93 Difference]: Finished difference Result 5456 states and 9917 transitions. [2021-11-19 05:25:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:28,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 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 05:25:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:28,551 INFO L225 Difference]: With dead ends: 5456 [2021-11-19 05:25:28,552 INFO L226 Difference]: Without dead ends: 3528 [2021-11-19 05:25:28,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:25:28,557 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 923 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:28,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-19 05:25:28,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-11-19 05:25:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3526. [2021-11-19 05:25:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.5670921985815602) internal successors, (5524), 3525 states have internal predecessors, (5524), 0 states have call successors, (0), 0 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 05:25:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5524 transitions. [2021-11-19 05:25:28,660 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5524 transitions. Word has length 78 [2021-11-19 05:25:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:28,661 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 5524 transitions. [2021-11-19 05:25:28,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 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 05:25:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5524 transitions. [2021-11-19 05:25:28,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 05:25:28,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:28,665 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, 1, 1, 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 05:25:28,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:25:28,665 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:28,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:28,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1133112465, now seen corresponding path program 1 times [2021-11-19 05:25:28,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:28,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545759717] [2021-11-19 05:25:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:28,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:28,754 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 05:25:28,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:28,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545759717] [2021-11-19 05:25:28,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545759717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:28,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:28,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:25:28,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167397193] [2021-11-19 05:25:28,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:28,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:28,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:28,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:25:28,758 INFO L87 Difference]: Start difference. First operand 3526 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 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 05:25:33,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:33,433 INFO L93 Difference]: Finished difference Result 10232 states and 16097 transitions. [2021-11-19 05:25:33,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:33,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 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 84 [2021-11-19 05:25:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:33,474 INFO L225 Difference]: With dead ends: 10232 [2021-11-19 05:25:33,475 INFO L226 Difference]: Without dead ends: 6708 [2021-11-19 05:25:33,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:25:33,482 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 972 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:33,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 850 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 05:25:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6708 states. [2021-11-19 05:25:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6708 to 6700. [2021-11-19 05:25:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 1.413046723391551) internal successors, (9466), 6699 states have internal predecessors, (9466), 0 states have call successors, (0), 0 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 05:25:33,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 9466 transitions. [2021-11-19 05:25:33,654 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 9466 transitions. Word has length 84 [2021-11-19 05:25:33,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:33,658 INFO L470 AbstractCegarLoop]: Abstraction has 6700 states and 9466 transitions. [2021-11-19 05:25:33,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 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 05:25:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 9466 transitions. [2021-11-19 05:25:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 05:25:33,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:33,668 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:25:33,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 05:25:33,669 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash 659309084, now seen corresponding path program 1 times [2021-11-19 05:25:33,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:33,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72423571] [2021-11-19 05:25:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:33,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:33,806 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 05:25:33,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:33,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72423571] [2021-11-19 05:25:33,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72423571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:33,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:33,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:25:33,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786873240] [2021-11-19 05:25:33,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:33,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:33,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:33,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:33,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:25:33,810 INFO L87 Difference]: Start difference. First operand 6700 states and 9466 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 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 05:25:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:38,163 INFO L93 Difference]: Finished difference Result 17443 states and 24479 transitions. [2021-11-19 05:25:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:38,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-19 05:25:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:38,214 INFO L225 Difference]: With dead ends: 17443 [2021-11-19 05:25:38,215 INFO L226 Difference]: Without dead ends: 10745 [2021-11-19 05:25:38,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:25:38,227 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 844 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:38,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 965 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 3291 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-19 05:25:38,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2021-11-19 05:25:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10669. [2021-11-19 05:25:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3562992125984252) internal successors, (14469), 10668 states have internal predecessors, (14469), 0 states have call successors, (0), 0 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 05:25:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14469 transitions. [2021-11-19 05:25:38,592 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14469 transitions. Word has length 114 [2021-11-19 05:25:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:38,593 INFO L470 AbstractCegarLoop]: Abstraction has 10669 states and 14469 transitions. [2021-11-19 05:25:38,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 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 05:25:38,594 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14469 transitions. [2021-11-19 05:25:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 05:25:38,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:38,597 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:25:38,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 05:25:38,597 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:38,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash -606577547, now seen corresponding path program 1 times [2021-11-19 05:25:38,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:38,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135772243] [2021-11-19 05:25:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:38,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:38,694 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 05:25:38,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:38,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135772243] [2021-11-19 05:25:38,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135772243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:38,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:38,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:25:38,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000194246] [2021-11-19 05:25:38,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:38,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:38,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:25:38,697 INFO L87 Difference]: Start difference. First operand 10669 states and 14469 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 05:25:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:42,506 INFO L93 Difference]: Finished difference Result 30031 states and 41242 transitions. [2021-11-19 05:25:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:42,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-11-19 05:25:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:42,566 INFO L225 Difference]: With dead ends: 30031 [2021-11-19 05:25:42,566 INFO L226 Difference]: Without dead ends: 20151 [2021-11-19 05:25:42,582 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 05:25:42,583 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 853 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:42,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 1160 Invalid, 3276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2484 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-19 05:25:42,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2021-11-19 05:25:42,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 18550. [2021-11-19 05:25:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18550 states, 18549 states have (on average 1.252466440239366) internal successors, (23232), 18549 states have internal predecessors, (23232), 0 states have call successors, (0), 0 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 05:25:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18550 states to 18550 states and 23232 transitions. [2021-11-19 05:25:43,019 INFO L78 Accepts]: Start accepts. Automaton has 18550 states and 23232 transitions. Word has length 124 [2021-11-19 05:25:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:43,021 INFO L470 AbstractCegarLoop]: Abstraction has 18550 states and 23232 transitions. [2021-11-19 05:25:43,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 05:25:43,026 INFO L276 IsEmpty]: Start isEmpty. Operand 18550 states and 23232 transitions. [2021-11-19 05:25:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 05:25:43,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:43,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:25:43,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 05:25:43,029 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:43,030 INFO L85 PathProgramCache]: Analyzing trace with hash 889611492, now seen corresponding path program 1 times [2021-11-19 05:25:43,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:43,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808189321] [2021-11-19 05:25:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:43,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:43,211 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 05:25:43,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:43,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808189321] [2021-11-19 05:25:43,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808189321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:43,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:43,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:25:43,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525250812] [2021-11-19 05:25:43,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:43,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:43,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:43,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:43,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:25:43,216 INFO L87 Difference]: Start difference. First operand 18550 states and 23232 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 05:25:47,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:47,119 INFO L93 Difference]: Finished difference Result 44989 states and 55638 transitions. [2021-11-19 05:25:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:47,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-11-19 05:25:47,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:47,180 INFO L225 Difference]: With dead ends: 44989 [2021-11-19 05:25:47,181 INFO L226 Difference]: Without dead ends: 26441 [2021-11-19 05:25:47,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:25:47,202 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 730 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:47,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1214 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-19 05:25:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26441 states. [2021-11-19 05:25:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26441 to 26434. [2021-11-19 05:25:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26434 states, 26433 states have (on average 1.2007717625695153) internal successors, (31740), 26433 states have internal predecessors, (31740), 0 states have call successors, (0), 0 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 05:25:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26434 states to 26434 states and 31740 transitions. [2021-11-19 05:25:47,688 INFO L78 Accepts]: Start accepts. Automaton has 26434 states and 31740 transitions. Word has length 129 [2021-11-19 05:25:47,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:47,689 INFO L470 AbstractCegarLoop]: Abstraction has 26434 states and 31740 transitions. [2021-11-19 05:25:47,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 05:25:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 26434 states and 31740 transitions. [2021-11-19 05:25:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-19 05:25:47,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:47,694 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:47,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 05:25:47,694 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:47,696 INFO L85 PathProgramCache]: Analyzing trace with hash -836746136, now seen corresponding path program 1 times [2021-11-19 05:25:47,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:47,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528556153] [2021-11-19 05:25:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:47,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:25:47,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:47,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528556153] [2021-11-19 05:25:47,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528556153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:47,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:47,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:25:47,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042683543] [2021-11-19 05:25:47,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:47,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:47,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:47,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:25:47,874 INFO L87 Difference]: Start difference. First operand 26434 states and 31740 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:51,895 INFO L93 Difference]: Finished difference Result 72535 states and 87976 transitions. [2021-11-19 05:25:51,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:51,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2021-11-19 05:25:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:51,989 INFO L225 Difference]: With dead ends: 72535 [2021-11-19 05:25:51,989 INFO L226 Difference]: Without dead ends: 46103 [2021-11-19 05:25:52,020 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 05:25:52,022 INFO L933 BasicCegarLoop]: 1847 mSDtfsCounter, 840 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:52,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 1984 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-19 05:25:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46103 states. [2021-11-19 05:25:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46103 to 42946. [2021-11-19 05:25:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42946 states, 42945 states have (on average 1.17205728257073) internal successors, (50334), 42945 states have internal predecessors, (50334), 0 states have call successors, (0), 0 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 05:25:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42946 states to 42946 states and 50334 transitions. [2021-11-19 05:25:52,869 INFO L78 Accepts]: Start accepts. Automaton has 42946 states and 50334 transitions. Word has length 227 [2021-11-19 05:25:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:52,869 INFO L470 AbstractCegarLoop]: Abstraction has 42946 states and 50334 transitions. [2021-11-19 05:25:52,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 42946 states and 50334 transitions. [2021-11-19 05:25:52,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-19 05:25:52,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:52,874 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:52,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 05:25:52,875 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1380443233, now seen corresponding path program 1 times [2021-11-19 05:25:52,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:52,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202302345] [2021-11-19 05:25:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:52,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:25:52,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:52,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202302345] [2021-11-19 05:25:52,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202302345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:52,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:52,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:25:52,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341391443] [2021-11-19 05:25:52,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:52,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:52,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:25:52,995 INFO L87 Difference]: Start difference. First operand 42946 states and 50334 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:56,783 INFO L93 Difference]: Finished difference Result 85103 states and 99869 transitions. [2021-11-19 05:25:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:25:56,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-11-19 05:25:56,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:56,827 INFO L225 Difference]: With dead ends: 85103 [2021-11-19 05:25:56,827 INFO L226 Difference]: Without dead ends: 42946 [2021-11-19 05:25:56,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:25:56,852 INFO L933 BasicCegarLoop]: 1064 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:56,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1193 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 05:25:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42946 states. [2021-11-19 05:25:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42946 to 42946. [2021-11-19 05:25:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42946 states, 42945 states have (on average 1.1719408545814414) internal successors, (50329), 42945 states have internal predecessors, (50329), 0 states have call successors, (0), 0 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 05:25:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42946 states to 42946 states and 50329 transitions. [2021-11-19 05:25:57,696 INFO L78 Accepts]: Start accepts. Automaton has 42946 states and 50329 transitions. Word has length 233 [2021-11-19 05:25:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:57,697 INFO L470 AbstractCegarLoop]: Abstraction has 42946 states and 50329 transitions. [2021-11-19 05:25:57,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:25:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 42946 states and 50329 transitions. [2021-11-19 05:25:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-19 05:25:57,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:57,703 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:57,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 05:25:57,706 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:57,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1208046358, now seen corresponding path program 1 times [2021-11-19 05:25:57,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:57,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416016227] [2021-11-19 05:25:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:57,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:25:58,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:58,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416016227] [2021-11-19 05:25:58,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416016227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:58,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:58,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:25:58,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813216995] [2021-11-19 05:25:58,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:58,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:25:58,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:58,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:25:58,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:25:58,178 INFO L87 Difference]: Start difference. First operand 42946 states and 50329 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 05:26:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:26:02,354 INFO L93 Difference]: Finished difference Result 104790 states and 124853 transitions. [2021-11-19 05:26:02,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:26:02,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 240 [2021-11-19 05:26:02,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:26:02,421 INFO L225 Difference]: With dead ends: 104790 [2021-11-19 05:26:02,421 INFO L226 Difference]: Without dead ends: 62633 [2021-11-19 05:26:02,434 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 05:26:02,435 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 825 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:26:02,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 928 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-19 05:26:02,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62633 states. [2021-11-19 05:26:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62633 to 61048. [2021-11-19 05:26:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61048 states, 61047 states have (on average 1.161138139466313) internal successors, (70884), 61047 states have internal predecessors, (70884), 0 states have call successors, (0), 0 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 05:26:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61048 states to 61048 states and 70884 transitions. [2021-11-19 05:26:03,492 INFO L78 Accepts]: Start accepts. Automaton has 61048 states and 70884 transitions. Word has length 240 [2021-11-19 05:26:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:26:03,494 INFO L470 AbstractCegarLoop]: Abstraction has 61048 states and 70884 transitions. [2021-11-19 05:26:03,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 05:26:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 61048 states and 70884 transitions. [2021-11-19 05:26:03,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-19 05:26:03,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:26:03,499 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 05:26:03,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 05:26:03,500 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:26:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:26:03,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1350158918, now seen corresponding path program 1 times [2021-11-19 05:26:03,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:26:03,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227298013] [2021-11-19 05:26:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:03,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:26:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-19 05:26:03,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:26:03,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227298013] [2021-11-19 05:26:03,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227298013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:26:03,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:26:03,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:26:03,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420612595] [2021-11-19 05:26:03,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:26:03,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:26:03,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:26:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:26:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:26:03,802 INFO L87 Difference]: Start difference. First operand 61048 states and 70884 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 05:26:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:26:07,383 INFO L93 Difference]: Finished difference Result 121305 states and 140973 transitions. [2021-11-19 05:26:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:26:07,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 254 [2021-11-19 05:26:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:26:07,446 INFO L225 Difference]: With dead ends: 121305 [2021-11-19 05:26:07,446 INFO L226 Difference]: Without dead ends: 61046 [2021-11-19 05:26:07,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 05:26:07,465 INFO L933 BasicCegarLoop]: 1357 mSDtfsCounter, 1193 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:26:07,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 1438 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-19 05:26:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61046 states. [2021-11-19 05:26:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61046 to 61045. [2021-11-19 05:26:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61045 states, 61044 states have (on average 1.1303322193827403) internal successors, (69000), 61044 states have internal predecessors, (69000), 0 states have call successors, (0), 0 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 05:26:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61045 states to 61045 states and 69000 transitions. [2021-11-19 05:26:08,162 INFO L78 Accepts]: Start accepts. Automaton has 61045 states and 69000 transitions. Word has length 254 [2021-11-19 05:26:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:26:08,162 INFO L470 AbstractCegarLoop]: Abstraction has 61045 states and 69000 transitions. [2021-11-19 05:26:08,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 05:26:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 61045 states and 69000 transitions. [2021-11-19 05:26:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-19 05:26:08,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:26:08,170 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 05:26:08,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 05:26:08,171 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:26:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:26:08,171 INFO L85 PathProgramCache]: Analyzing trace with hash 290243953, now seen corresponding path program 1 times [2021-11-19 05:26:08,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:26:08,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466228293] [2021-11-19 05:26:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:08,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:26:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 150 proven. 113 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:26:08,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:26:08,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466228293] [2021-11-19 05:26:08,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466228293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:26:08,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928668923] [2021-11-19 05:26:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:08,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:26:08,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:26:08,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:26:08,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:26:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:08,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:26:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:26:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-19 05:26:09,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:26:09,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928668923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:26:09,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:26:09,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-19 05:26:09,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462533683] [2021-11-19 05:26:09,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:26:09,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:26:09,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:26:09,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:26:09,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:26:09,501 INFO L87 Difference]: Start difference. First operand 61045 states and 69000 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 05:26:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:26:13,312 INFO L93 Difference]: Finished difference Result 121290 states and 137196 transitions. [2021-11-19 05:26:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:26:13,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 319 [2021-11-19 05:26:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:26:13,372 INFO L225 Difference]: With dead ends: 121290 [2021-11-19 05:26:13,373 INFO L226 Difference]: Without dead ends: 61034 [2021-11-19 05:26:13,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:26:13,395 INFO L933 BasicCegarLoop]: 685 mSDtfsCounter, 1073 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2392 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:26:13,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 816 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2392 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-19 05:26:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61034 states. [2021-11-19 05:26:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61034 to 61031. [2021-11-19 05:26:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61031 states, 61030 states have (on average 1.0942978862854333) internal successors, (66785), 61030 states have internal predecessors, (66785), 0 states have call successors, (0), 0 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 05:26:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61031 states to 61031 states and 66785 transitions. [2021-11-19 05:26:14,381 INFO L78 Accepts]: Start accepts. Automaton has 61031 states and 66785 transitions. Word has length 319 [2021-11-19 05:26:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:26:14,382 INFO L470 AbstractCegarLoop]: Abstraction has 61031 states and 66785 transitions. [2021-11-19 05:26:14,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 05:26:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 61031 states and 66785 transitions. [2021-11-19 05:26:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-11-19 05:26:14,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:26:14,419 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:26:14,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 05:26:14,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 05:26:14,631 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:26:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:26:14,632 INFO L85 PathProgramCache]: Analyzing trace with hash 448094546, now seen corresponding path program 1 times [2021-11-19 05:26:14,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:26:14,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371360057] [2021-11-19 05:26:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:14,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:26:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-19 05:26:14,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:26:14,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371360057] [2021-11-19 05:26:14,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371360057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:26:14,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:26:14,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:26:14,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724641819] [2021-11-19 05:26:14,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:26:14,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:26:14,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:26:14,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:26:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:26:14,782 INFO L87 Difference]: Start difference. First operand 61031 states and 66785 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 05:26:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:26:22,980 INFO L93 Difference]: Finished difference Result 160046 states and 175830 transitions. [2021-11-19 05:26:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:26:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 361 [2021-11-19 05:26:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:26:23,085 INFO L225 Difference]: With dead ends: 160046 [2021-11-19 05:26:23,085 INFO L226 Difference]: Without dead ends: 99804 [2021-11-19 05:26:23,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 05:26:23,109 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 1701 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 6693 mSolverCounterSat, 1016 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 7709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1016 IncrementalHoareTripleChecker+Valid, 6693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:26:23,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1701 Valid, 849 Invalid, 7709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1016 Valid, 6693 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-11-19 05:26:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99804 states. [2021-11-19 05:26:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99804 to 76786. [2021-11-19 05:26:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76786 states, 76785 states have (on average 1.0868138308263333) internal successors, (83451), 76785 states have internal predecessors, (83451), 0 states have call successors, (0), 0 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 05:26:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76786 states to 76786 states and 83451 transitions. [2021-11-19 05:26:24,389 INFO L78 Accepts]: Start accepts. Automaton has 76786 states and 83451 transitions. Word has length 361 [2021-11-19 05:26:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:26:24,390 INFO L470 AbstractCegarLoop]: Abstraction has 76786 states and 83451 transitions. [2021-11-19 05:26:24,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 05:26:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 76786 states and 83451 transitions. [2021-11-19 05:26:24,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-11-19 05:26:24,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:26:24,398 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:26:24,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 05:26:24,399 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:26:24,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:26:24,399 INFO L85 PathProgramCache]: Analyzing trace with hash 976006743, now seen corresponding path program 1 times [2021-11-19 05:26:24,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:26:24,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140002319] [2021-11-19 05:26:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:24,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:26:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 05:26:24,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:26:24,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140002319] [2021-11-19 05:26:24,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140002319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:26:24,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:26:24,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:26:24,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75305541] [2021-11-19 05:26:24,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:26:24,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:26:24,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:26:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:26:24,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:26:24,631 INFO L87 Difference]: Start difference. First operand 76786 states and 83451 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 05:26:29,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:26:29,142 INFO L93 Difference]: Finished difference Result 177191 states and 193935 transitions. [2021-11-19 05:26:29,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:26:29,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 374 [2021-11-19 05:26:29,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:26:29,259 INFO L225 Difference]: With dead ends: 177191 [2021-11-19 05:26:29,259 INFO L226 Difference]: Without dead ends: 101194 [2021-11-19 05:26:29,295 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 05:26:29,296 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 813 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 3350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:26:29,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 893 Invalid, 3350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-19 05:26:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101194 states. [2021-11-19 05:26:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101194 to 99602. [2021-11-19 05:26:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99602 states, 99601 states have (on average 1.090099496993002) internal successors, (108575), 99601 states have internal predecessors, (108575), 0 states have call successors, (0), 0 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 05:26:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99602 states to 99602 states and 108575 transitions. [2021-11-19 05:26:30,765 INFO L78 Accepts]: Start accepts. Automaton has 99602 states and 108575 transitions. Word has length 374 [2021-11-19 05:26:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:26:30,766 INFO L470 AbstractCegarLoop]: Abstraction has 99602 states and 108575 transitions. [2021-11-19 05:26:30,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 05:26:30,767 INFO L276 IsEmpty]: Start isEmpty. Operand 99602 states and 108575 transitions. [2021-11-19 05:26:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-19 05:26:30,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:26:30,777 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 05:26:30,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 05:26:30,777 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:26:30,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:26:30,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1106420568, now seen corresponding path program 1 times [2021-11-19 05:26:30,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:26:30,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633101106] [2021-11-19 05:26:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:30,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:26:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 319 proven. 113 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-19 05:26:31,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:26:31,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633101106] [2021-11-19 05:26:31,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633101106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:26:31,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15828787] [2021-11-19 05:26:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:31,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:26:31,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:26:31,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:26:31,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:26:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:31,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:26:31,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:26:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-11-19 05:26:32,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:26:32,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15828787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:26:32,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:26:32,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-19 05:26:32,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582354350] [2021-11-19 05:26:32,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:26:32,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:26:32,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:26:32,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:26:32,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:26:32,208 INFO L87 Difference]: Start difference. First operand 99602 states and 108575 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 05:26:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:26:36,496 INFO L93 Difference]: Finished difference Result 199993 states and 217948 transitions. [2021-11-19 05:26:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:26:36,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 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 404 [2021-11-19 05:26:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:26:36,600 INFO L225 Difference]: With dead ends: 199993 [2021-11-19 05:26:36,600 INFO L226 Difference]: Without dead ends: 101180 [2021-11-19 05:26:36,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:26:36,628 INFO L933 BasicCegarLoop]: 1385 mSDtfsCounter, 1026 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:26:36,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 1471 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-19 05:26:36,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101180 states. [2021-11-19 05:26:37,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101180 to 99594. [2021-11-19 05:26:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99594 states, 99593 states have (on average 1.0667014750032633) internal successors, (106236), 99593 states have internal predecessors, (106236), 0 states have call successors, (0), 0 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 05:26:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99594 states to 99594 states and 106236 transitions. [2021-11-19 05:26:37,860 INFO L78 Accepts]: Start accepts. Automaton has 99594 states and 106236 transitions. Word has length 404 [2021-11-19 05:26:37,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:26:37,861 INFO L470 AbstractCegarLoop]: Abstraction has 99594 states and 106236 transitions. [2021-11-19 05:26:37,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 05:26:37,861 INFO L276 IsEmpty]: Start isEmpty. Operand 99594 states and 106236 transitions. [2021-11-19 05:26:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-19 05:26:37,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:26:37,878 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-19 05:26:37,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-19 05:26:38,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:26:38,095 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:26:38,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:26:38,095 INFO L85 PathProgramCache]: Analyzing trace with hash -663684841, now seen corresponding path program 1 times [2021-11-19 05:26:38,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:26:38,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251620079] [2021-11-19 05:26:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:38,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:26:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-19 05:26:38,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:26:38,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251620079] [2021-11-19 05:26:38,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251620079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:26:38,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:26:38,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:26:38,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695859858] [2021-11-19 05:26:38,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:26:38,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:26:38,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:26:38,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:26:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:26:38,808 INFO L87 Difference]: Start difference. First operand 99594 states and 106236 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 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 05:26:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:26:43,011 INFO L93 Difference]: Finished difference Result 223599 states and 239290 transitions. [2021-11-19 05:26:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:26:43,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 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 486 [2021-11-19 05:26:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:26:43,163 INFO L225 Difference]: With dead ends: 223599 [2021-11-19 05:26:43,163 INFO L226 Difference]: Without dead ends: 123220 [2021-11-19 05:26:43,205 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 05:26:43,206 INFO L933 BasicCegarLoop]: 1740 mSDtfsCounter, 703 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:26:43,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [703 Valid, 1883 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-19 05:26:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123220 states. [2021-11-19 05:26:44,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123220 to 123202. [2021-11-19 05:26:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123202 states, 123201 states have (on average 1.0590985462780333) internal successors, (130482), 123201 states have internal predecessors, (130482), 0 states have call successors, (0), 0 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 05:26:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123202 states to 123202 states and 130482 transitions. [2021-11-19 05:26:45,301 INFO L78 Accepts]: Start accepts. Automaton has 123202 states and 130482 transitions. Word has length 486 [2021-11-19 05:26:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:26:45,301 INFO L470 AbstractCegarLoop]: Abstraction has 123202 states and 130482 transitions. [2021-11-19 05:26:45,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 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 05:26:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 123202 states and 130482 transitions. [2021-11-19 05:26:45,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2021-11-19 05:26:45,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:26:45,319 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:26:45,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 05:26:45,320 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:26:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:26:45,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1195250089, now seen corresponding path program 1 times [2021-11-19 05:26:45,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:26:45,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482046570] [2021-11-19 05:26:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:45,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:26:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 262 proven. 110 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:26:45,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:26:45,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482046570] [2021-11-19 05:26:45,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482046570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:26:45,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254101688] [2021-11-19 05:26:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:45,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:26:45,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:26:45,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:26:45,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:26:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:45,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:26:45,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:26:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-19 05:26:46,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:26:46,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254101688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:26:46,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:26:46,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-19 05:26:46,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923334246] [2021-11-19 05:26:46,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:26:46,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:26:46,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:26:46,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:26:46,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:26:46,687 INFO L87 Difference]: Start difference. First operand 123202 states and 130482 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 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 05:26:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:26:51,580 INFO L93 Difference]: Finished difference Result 282681 states and 299848 transitions. [2021-11-19 05:26:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:26:51,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 509 [2021-11-19 05:26:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:26:51,751 INFO L225 Difference]: With dead ends: 282681 [2021-11-19 05:26:51,751 INFO L226 Difference]: Without dead ends: 160268 [2021-11-19 05:26:52,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:26:52,203 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 1025 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2753 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 3685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 2753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:26:52,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 467 Invalid, 3685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 2753 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-19 05:26:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160268 states. [2021-11-19 05:26:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160268 to 157048. [2021-11-19 05:26:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157048 states, 157047 states have (on average 1.0612173425789733) internal successors, (166661), 157047 states have internal predecessors, (166661), 0 states have call successors, (0), 0 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 05:26:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157048 states to 157048 states and 166661 transitions. [2021-11-19 05:26:54,574 INFO L78 Accepts]: Start accepts. Automaton has 157048 states and 166661 transitions. Word has length 509 [2021-11-19 05:26:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:26:54,575 INFO L470 AbstractCegarLoop]: Abstraction has 157048 states and 166661 transitions. [2021-11-19 05:26:54,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 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 05:26:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 157048 states and 166661 transitions. [2021-11-19 05:26:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2021-11-19 05:26:54,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:26:54,627 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:26:54,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-19 05:26:54,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 05:26:54,828 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:26:54,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:26:54,829 INFO L85 PathProgramCache]: Analyzing trace with hash -396042517, now seen corresponding path program 1 times [2021-11-19 05:26:54,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:26:54,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209494228] [2021-11-19 05:26:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:54,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:26:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 316 proven. 110 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:26:55,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:26:55,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209494228] [2021-11-19 05:26:55,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209494228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:26:55,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790015672] [2021-11-19 05:26:55,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:55,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:26:55,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:26:55,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:26:55,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:26:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:55,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:26:55,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:26:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-19 05:26:57,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:26:57,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790015672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:26:57,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:26:57,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-19 05:26:57,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671246966] [2021-11-19 05:26:57,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:26:57,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:26:57,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:26:57,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:26:57,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:26:57,460 INFO L87 Difference]: Start difference. First operand 157048 states and 166661 transitions. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 2 states have internal predecessors, (424), 0 states have call successors, (0), 0 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 05:27:01,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:01,020 INFO L93 Difference]: Finished difference Result 301511 states and 320520 transitions. [2021-11-19 05:27:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:27:01,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 2 states have internal predecessors, (424), 0 states have call successors, (0), 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 557 [2021-11-19 05:27:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:01,156 INFO L225 Difference]: With dead ends: 301511 [2021-11-19 05:27:01,156 INFO L226 Difference]: Without dead ends: 161783 [2021-11-19 05:27:01,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 556 SyntacticMatches, 0 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 05:27:01,209 INFO L933 BasicCegarLoop]: 1016 mSDtfsCounter, 546 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:01,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 1150 Invalid, 2558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 05:27:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161783 states. [2021-11-19 05:27:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161783 to 160986. [2021-11-19 05:27:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160986 states, 160985 states have (on average 1.0561977824020872) internal successors, (170032), 160985 states have internal predecessors, (170032), 0 states have call successors, (0), 0 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 05:27:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160986 states to 160986 states and 170032 transitions. [2021-11-19 05:27:03,532 INFO L78 Accepts]: Start accepts. Automaton has 160986 states and 170032 transitions. Word has length 557 [2021-11-19 05:27:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:03,532 INFO L470 AbstractCegarLoop]: Abstraction has 160986 states and 170032 transitions. [2021-11-19 05:27:03,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 2 states have internal predecessors, (424), 0 states have call successors, (0), 0 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 05:27:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 160986 states and 170032 transitions. [2021-11-19 05:27:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2021-11-19 05:27:03,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:03,547 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 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] [2021-11-19 05:27:03,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:27:03,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a548d56c-0b48-4b14-8a1a-b35670cb916d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 05:27:03,749 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:03,749 INFO L85 PathProgramCache]: Analyzing trace with hash 291527895, now seen corresponding path program 1 times [2021-11-19 05:27:03,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:03,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743371738] [2021-11-19 05:27:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:03,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 453 proven. 0 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2021-11-19 05:27:03,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:03,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743371738] [2021-11-19 05:27:03,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743371738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:03,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:03,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:27:03,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202906421] [2021-11-19 05:27:03,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:03,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:27:03,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:03,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:27:03,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:27:03,968 INFO L87 Difference]: Start difference. First operand 160986 states and 170032 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 2 states have internal predecessors, (301), 0 states have call successors, (0), 0 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 05:27:07,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:07,258 INFO L93 Difference]: Finished difference Result 303059 states and 320766 transitions. [2021-11-19 05:27:07,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:27:07,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 2 states have internal predecessors, (301), 0 states have call successors, (0), 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 576 [2021-11-19 05:27:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:07,445 INFO L225 Difference]: With dead ends: 303059 [2021-11-19 05:27:07,445 INFO L226 Difference]: Without dead ends: 160970 [2021-11-19 05:27:07,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:27:07,513 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 1600 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:07,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1600 Valid, 290 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 05:27:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160970 states.