./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label18.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label18.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ --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 6ef9f02eeb8480c92d0c249f15386b1338daf60e359031b970c1be1640c041cb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:23:04,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:23:04,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:23:04,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:23:04,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:23:04,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:23:04,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:23:04,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:23:04,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:23:04,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:23:04,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:23:04,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:23:04,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:23:04,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:23:04,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:23:04,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:23:04,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:23:04,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:23:04,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:23:04,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:23:04,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:23:04,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:23:04,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:23:04,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:23:04,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:23:04,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:23:04,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:23:04,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:23:04,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:23:04,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:23:04,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:23:04,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:23:04,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:23:04,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:23:04,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:23:04,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:23:04,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:23:04,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:23:04,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:23:04,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:23:04,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:23:04,536 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:23:04,582 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:23:04,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:23:04,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:23:04,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:23:04,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:23:04,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:23:04,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:23:04,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:23:04,586 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:23:04,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:23:04,587 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:23:04,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:23:04,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:23:04,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:23:04,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:23:04,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:23:04,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:23:04,589 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:23:04,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:23:04,590 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:23:04,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:23:04,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:23:04,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:23:04,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:23:04,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:23:04,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:23:04,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:23:04,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:23:04,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:23:04,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:23:04,592 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:23:04,593 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:23:04,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:23:04,593 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_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ef9f02eeb8480c92d0c249f15386b1338daf60e359031b970c1be1640c041cb [2022-10-17 10:23:04,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:23:04,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:23:04,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:23:04,926 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:23:04,926 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:23:04,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem16_label18.c [2022-10-17 10:23:05,020 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/data/246761a1e/3c0f4de461614bd4a44ab44cd4fb09bc/FLAGc35af2527 [2022-10-17 10:23:05,667 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:23:05,667 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/sv-benchmarks/c/eca-rers2012/Problem16_label18.c [2022-10-17 10:23:05,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/data/246761a1e/3c0f4de461614bd4a44ab44cd4fb09bc/FLAGc35af2527 [2022-10-17 10:23:05,831 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/data/246761a1e/3c0f4de461614bd4a44ab44cd4fb09bc [2022-10-17 10:23:05,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:23:05,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:23:05,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:23:05,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:23:05,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:23:05,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:23:05" (1/1) ... [2022-10-17 10:23:05,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ec0ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:05, skipping insertion in model container [2022-10-17 10:23:05,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:23:05" (1/1) ... [2022-10-17 10:23:05,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:23:05,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:23:06,218 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_d997b1b2-e03e-49c0-80ed-a35df540086a/sv-benchmarks/c/eca-rers2012/Problem16_label18.c[1111,1124] [2022-10-17 10:23:06,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:23:06,704 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:23:06,717 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_d997b1b2-e03e-49c0-80ed-a35df540086a/sv-benchmarks/c/eca-rers2012/Problem16_label18.c[1111,1124] [2022-10-17 10:23:06,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:23:06,961 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:23:06,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06 WrapperNode [2022-10-17 10:23:06,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:23:06,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:23:06,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:23:06,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:23:06,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06" (1/1) ... [2022-10-17 10:23:07,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06" (1/1) ... [2022-10-17 10:23:07,208 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2022-10-17 10:23:07,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:23:07,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:23:07,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:23:07,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:23:07,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06" (1/1) ... [2022-10-17 10:23:07,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06" (1/1) ... [2022-10-17 10:23:07,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06" (1/1) ... [2022-10-17 10:23:07,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06" (1/1) ... [2022-10-17 10:23:07,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06" (1/1) ... [2022-10-17 10:23:07,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06" (1/1) ... [2022-10-17 10:23:07,356 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06" (1/1) ... [2022-10-17 10:23:07,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06" (1/1) ... [2022-10-17 10:23:07,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:23:07,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:23:07,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:23:07,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:23:07,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06" (1/1) ... [2022-10-17 10:23:07,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:23:07,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:23:07,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:23:07,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:23:07,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:23:07,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:23:07,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:23:07,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:23:07,592 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:23:07,594 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:23:10,234 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:23:10,258 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:23:10,259 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:23:10,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:23:10 BoogieIcfgContainer [2022-10-17 10:23:10,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:23:10,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:23:10,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:23:10,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:23:10,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:23:05" (1/3) ... [2022-10-17 10:23:10,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba6da8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:23:10, skipping insertion in model container [2022-10-17 10:23:10,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:06" (2/3) ... [2022-10-17 10:23:10,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba6da8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:23:10, skipping insertion in model container [2022-10-17 10:23:10,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:23:10" (3/3) ... [2022-10-17 10:23:10,272 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label18.c [2022-10-17 10:23:10,295 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:23:10,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:23:10,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:23:10,398 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@49290ccd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:23:10,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:23:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 10:23:10,417 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:10,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:10,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:10,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:10,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1810726993, now seen corresponding path program 1 times [2022-10-17 10:23:10,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:10,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069766852] [2022-10-17 10:23:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:10,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:23:10,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:10,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069766852] [2022-10-17 10:23:10,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069766852] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:10,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:10,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:23:10,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638511748] [2022-10-17 10:23:10,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:10,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:10,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:10,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:10,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:10,754 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:13,022 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2022-10-17 10:23:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:13,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-10-17 10:23:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:13,054 INFO L225 Difference]: With dead ends: 1122 [2022-10-17 10:23:13,054 INFO L226 Difference]: Without dead ends: 662 [2022-10-17 10:23:13,060 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:23:13,064 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 380 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:13,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 254 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-10-17 10:23:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-10-17 10:23:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2022-10-17 10:23:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.518910741301059) internal successors, (1004), 661 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1004 transitions. [2022-10-17 10:23:13,146 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1004 transitions. Word has length 7 [2022-10-17 10:23:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:13,146 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1004 transitions. [2022-10-17 10:23:13,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1004 transitions. [2022-10-17 10:23:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-10-17 10:23:13,149 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:13,150 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:13,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:23:13,150 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:13,151 INFO L85 PathProgramCache]: Analyzing trace with hash 315427350, now seen corresponding path program 1 times [2022-10-17 10:23:13,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:13,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862198350] [2022-10-17 10:23:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:13,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:23:13,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:13,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862198350] [2022-10-17 10:23:13,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862198350] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:13,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:13,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:23:13,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158824661] [2022-10-17 10:23:13,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:13,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:13,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:13,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:13,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:13,551 INFO L87 Difference]: Start difference. First operand 662 states and 1004 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:15,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:15,427 INFO L93 Difference]: Finished difference Result 1980 states and 3007 transitions. [2022-10-17 10:23:15,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:15,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-10-17 10:23:15,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:15,436 INFO L225 Difference]: With dead ends: 1980 [2022-10-17 10:23:15,436 INFO L226 Difference]: Without dead ends: 1320 [2022-10-17 10:23:15,438 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:23:15,440 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 268 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:15,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 217 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-10-17 10:23:15,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-10-17 10:23:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2022-10-17 10:23:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.4556482183472328) internal successors, (1920), 1319 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1920 transitions. [2022-10-17 10:23:15,494 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1920 transitions. Word has length 75 [2022-10-17 10:23:15,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:15,495 INFO L495 AbstractCegarLoop]: Abstraction has 1320 states and 1920 transitions. [2022-10-17 10:23:15,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1920 transitions. [2022-10-17 10:23:15,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-10-17 10:23:15,499 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:15,499 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:15,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:23:15,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:15,501 INFO L85 PathProgramCache]: Analyzing trace with hash 631289711, now seen corresponding path program 1 times [2022-10-17 10:23:15,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:15,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916395984] [2022-10-17 10:23:15,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:15,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:23:15,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:15,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916395984] [2022-10-17 10:23:15,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916395984] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:15,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:15,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:23:15,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808603148] [2022-10-17 10:23:15,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:15,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:15,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:15,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:15,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:15,693 INFO L87 Difference]: Start difference. First operand 1320 states and 1920 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:17,314 INFO L93 Difference]: Finished difference Result 3954 states and 5755 transitions. [2022-10-17 10:23:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:17,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-10-17 10:23:17,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:17,335 INFO L225 Difference]: With dead ends: 3954 [2022-10-17 10:23:17,335 INFO L226 Difference]: Without dead ends: 2636 [2022-10-17 10:23:17,338 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:23:17,347 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 369 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:17,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 155 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-10-17 10:23:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2022-10-17 10:23:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2636. [2022-10-17 10:23:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 1.3240986717267553) internal successors, (3489), 2635 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 3489 transitions. [2022-10-17 10:23:17,418 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 3489 transitions. Word has length 86 [2022-10-17 10:23:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:17,419 INFO L495 AbstractCegarLoop]: Abstraction has 2636 states and 3489 transitions. [2022-10-17 10:23:17,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 3489 transitions. [2022-10-17 10:23:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-10-17 10:23:17,426 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:17,427 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:17,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:23:17,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:17,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:17,428 INFO L85 PathProgramCache]: Analyzing trace with hash 736201777, now seen corresponding path program 1 times [2022-10-17 10:23:17,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:17,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249833585] [2022-10-17 10:23:17,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:17,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:23:17,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:17,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249833585] [2022-10-17 10:23:17,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249833585] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:17,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:17,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:23:17,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679973259] [2022-10-17 10:23:17,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:17,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:17,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:17,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:17,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:17,820 INFO L87 Difference]: Start difference. First operand 2636 states and 3489 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:19,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:19,301 INFO L93 Difference]: Finished difference Result 6586 states and 8545 transitions. [2022-10-17 10:23:19,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:19,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 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 204 [2022-10-17 10:23:19,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:19,325 INFO L225 Difference]: With dead ends: 6586 [2022-10-17 10:23:19,325 INFO L226 Difference]: Without dead ends: 3952 [2022-10-17 10:23:19,329 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:23:19,331 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 277 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:19,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 84 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-10-17 10:23:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2022-10-17 10:23:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2022-10-17 10:23:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.216400911161731) internal successors, (4806), 3951 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4806 transitions. [2022-10-17 10:23:19,472 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4806 transitions. Word has length 204 [2022-10-17 10:23:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:19,475 INFO L495 AbstractCegarLoop]: Abstraction has 3952 states and 4806 transitions. [2022-10-17 10:23:19,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:19,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4806 transitions. [2022-10-17 10:23:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-10-17 10:23:19,484 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:19,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:19,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:23:19,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:19,486 INFO L85 PathProgramCache]: Analyzing trace with hash 328873390, now seen corresponding path program 1 times [2022-10-17 10:23:19,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:19,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427869857] [2022-10-17 10:23:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:19,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:23:20,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:20,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427869857] [2022-10-17 10:23:20,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427869857] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:20,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:20,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:23:20,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211136635] [2022-10-17 10:23:20,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:20,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:23:20,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:20,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:23:20,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:23:20,224 INFO L87 Difference]: Start difference. First operand 3952 states and 4806 transitions. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:21,961 INFO L93 Difference]: Finished difference Result 8269 states and 9989 transitions. [2022-10-17 10:23:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:23:21,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 252 [2022-10-17 10:23:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:21,993 INFO L225 Difference]: With dead ends: 8269 [2022-10-17 10:23:21,994 INFO L226 Difference]: Without dead ends: 4319 [2022-10-17 10:23:21,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:23:22,000 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 175 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:22,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 371 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-10-17 10:23:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4319 states. [2022-10-17 10:23:22,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4319 to 4281. [2022-10-17 10:23:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4281 states, 4280 states have (on average 1.2011682242990653) internal successors, (5141), 4280 states have internal predecessors, (5141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 5141 transitions. [2022-10-17 10:23:22,113 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 5141 transitions. Word has length 252 [2022-10-17 10:23:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:22,115 INFO L495 AbstractCegarLoop]: Abstraction has 4281 states and 5141 transitions. [2022-10-17 10:23:22,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 5141 transitions. [2022-10-17 10:23:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-10-17 10:23:22,127 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:22,128 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:22,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:23:22,129 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:22,130 INFO L85 PathProgramCache]: Analyzing trace with hash -225792452, now seen corresponding path program 1 times [2022-10-17 10:23:22,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:22,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771008787] [2022-10-17 10:23:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:22,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:23:22,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:22,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771008787] [2022-10-17 10:23:22,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771008787] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:22,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:22,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:23:22,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750121891] [2022-10-17 10:23:22,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:22,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:23:22,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:23:22,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:23:22,988 INFO L87 Difference]: Start difference. First operand 4281 states and 5141 transitions. Second operand has 7 states, 7 states have (on average 48.42857142857143) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:25,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:25,154 INFO L93 Difference]: Finished difference Result 8090 states and 9792 transitions. [2022-10-17 10:23:25,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:23:25,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 48.42857142857143) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 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 339 [2022-10-17 10:23:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:25,175 INFO L225 Difference]: With dead ends: 8090 [2022-10-17 10:23:25,175 INFO L226 Difference]: Without dead ends: 3952 [2022-10-17 10:23:25,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:23:25,181 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 392 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:25,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 286 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 1526 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-10-17 10:23:25,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2022-10-17 10:23:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2022-10-17 10:23:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.0802328524424196) internal successors, (4268), 3951 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:25,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4268 transitions. [2022-10-17 10:23:25,274 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4268 transitions. Word has length 339 [2022-10-17 10:23:25,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:25,275 INFO L495 AbstractCegarLoop]: Abstraction has 3952 states and 4268 transitions. [2022-10-17 10:23:25,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.42857142857143) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:25,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4268 transitions. [2022-10-17 10:23:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-10-17 10:23:25,281 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:25,282 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:25,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:23:25,282 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:25,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:25,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1791635028, now seen corresponding path program 1 times [2022-10-17 10:23:25,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:25,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405495286] [2022-10-17 10:23:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:25,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-10-17 10:23:25,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:25,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405495286] [2022-10-17 10:23:25,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405495286] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:25,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:25,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:23:25,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262092029] [2022-10-17 10:23:25,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:25,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:25,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:25,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:25,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:25,635 INFO L87 Difference]: Start difference. First operand 3952 states and 4268 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:27,129 INFO L93 Difference]: Finished difference Result 9547 states and 10414 transitions. [2022-10-17 10:23:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:27,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 346 [2022-10-17 10:23:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:27,161 INFO L225 Difference]: With dead ends: 9547 [2022-10-17 10:23:27,161 INFO L226 Difference]: Without dead ends: 5926 [2022-10-17 10:23:27,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:27,169 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 342 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:27,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 40 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-10-17 10:23:27,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2022-10-17 10:23:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 5926. [2022-10-17 10:23:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.0828691983122363) internal successors, (6416), 5925 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6416 transitions. [2022-10-17 10:23:27,318 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6416 transitions. Word has length 346 [2022-10-17 10:23:27,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:27,319 INFO L495 AbstractCegarLoop]: Abstraction has 5926 states and 6416 transitions. [2022-10-17 10:23:27,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6416 transitions. [2022-10-17 10:23:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-10-17 10:23:27,328 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:27,329 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:23:27,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:23:27,329 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:27,330 INFO L85 PathProgramCache]: Analyzing trace with hash -904340338, now seen corresponding path program 1 times [2022-10-17 10:23:27,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:27,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625969592] [2022-10-17 10:23:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:27,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-10-17 10:23:27,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:27,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625969592] [2022-10-17 10:23:27,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625969592] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:27,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:27,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:23:27,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068525445] [2022-10-17 10:23:27,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:27,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:27,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:27,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:27,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:27,817 INFO L87 Difference]: Start difference. First operand 5926 states and 6416 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:28,873 INFO L93 Difference]: Finished difference Result 13495 states and 14710 transitions. [2022-10-17 10:23:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:28,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 463 [2022-10-17 10:23:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:28,929 INFO L225 Difference]: With dead ends: 13495 [2022-10-17 10:23:28,929 INFO L226 Difference]: Without dead ends: 7900 [2022-10-17 10:23:28,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:28,938 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 326 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:28,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 440 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 10:23:28,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2022-10-17 10:23:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 7571. [2022-10-17 10:23:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7571 states, 7570 states have (on average 1.070541611624835) internal successors, (8104), 7570 states have internal predecessors, (8104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 8104 transitions. [2022-10-17 10:23:29,185 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 8104 transitions. Word has length 463 [2022-10-17 10:23:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:29,187 INFO L495 AbstractCegarLoop]: Abstraction has 7571 states and 8104 transitions. [2022-10-17 10:23:29,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:29,188 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 8104 transitions. [2022-10-17 10:23:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-10-17 10:23:29,201 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:29,202 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 10:23:29,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:23:29,204 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:29,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1872524626, now seen corresponding path program 1 times [2022-10-17 10:23:29,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:29,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238400578] [2022-10-17 10:23:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:29,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 9 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:23:31,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:31,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238400578] [2022-10-17 10:23:31,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238400578] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:23:31,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975467572] [2022-10-17 10:23:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:31,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:23:31,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:23:31,026 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:23:31,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d997b1b2-e03e-49c0-80ed-a35df540086a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:23:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:31,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:23:31,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:23:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-10-17 10:23:32,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:23:32,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975467572] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:32,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:23:32,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-10-17 10:23:32,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817659533] [2022-10-17 10:23:32,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:32,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:32,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:32,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:32,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:23:32,187 INFO L87 Difference]: Start difference. First operand 7571 states and 8104 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)