./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de62.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de62.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R --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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --- 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-38b53e6 [2022-11-25 17:16:01,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:16:01,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:16:01,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:16:01,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:16:01,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:16:01,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:16:01,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:16:01,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:16:01,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:16:01,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:16:01,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:16:01,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:16:01,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:16:01,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:16:01,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:16:01,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:16:01,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:16:01,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:16:01,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:16:01,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:16:01,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:16:01,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:16:01,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:16:01,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:16:01,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:16:01,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:16:01,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:16:01,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:16:01,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:16:01,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:16:01,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:16:01,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:16:01,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:16:01,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:16:01,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:16:01,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:16:01,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:16:01,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:16:01,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:16:01,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:16:01,484 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:16:01,524 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:16:01,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:16:01,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:16:01,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:16:01,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:16:01,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:16:01,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:16:01,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:16:01,527 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:16:01,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:16:01,529 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:16:01,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:16:01,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:16:01,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:16:01,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:16:01,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:16:01,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:16:01,531 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:16:01,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:16:01,531 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:16:01,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:16:01,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:16:01,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:16:01,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:16:01,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:16:01,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:16:01,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:16:01,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:16:01,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:16:01,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:16:01,534 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:16:01,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:16:01,535 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:16:01,535 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:16:01,535 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf [2022-11-25 17:16:01,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:16:01,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:16:01,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:16:01,939 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:16:01,940 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:16:01,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/loops-crafted-1/in-de62.c [2022-11-25 17:16:04,984 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:16:05,239 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:16:05,240 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/sv-benchmarks/c/loops-crafted-1/in-de62.c [2022-11-25 17:16:05,247 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/data/69a2d5ca4/b8892ddfb0df47b887c1ba1bd46bbd7f/FLAG6fe9b63b2 [2022-11-25 17:16:05,280 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/data/69a2d5ca4/b8892ddfb0df47b887c1ba1bd46bbd7f [2022-11-25 17:16:05,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:16:05,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:16:05,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:16:05,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:16:05,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:16:05,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47856466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05, skipping insertion in model container [2022-11-25 17:16:05,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:16:05,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:16:05,542 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2022-11-25 17:16:05,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:16:05,584 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:16:05,600 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2022-11-25 17:16:05,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:16:05,616 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:16:05,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05 WrapperNode [2022-11-25 17:16:05,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:16:05,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:16:05,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:16:05,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:16:05,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,650 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-11-25 17:16:05,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:16:05,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:16:05,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:16:05,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:16:05,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,684 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:16:05,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:16:05,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:16:05,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:16:05,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05" (1/1) ... [2022-11-25 17:16:05,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:16:05,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:05,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:16:05,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:16:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:16:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:16:05,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:16:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:16:05,867 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:16:05,869 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:16:06,087 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:16:06,097 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:16:06,098 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 17:16:06,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:16:06 BoogieIcfgContainer [2022-11-25 17:16:06,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:16:06,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:16:06,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:16:06,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:16:06,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:16:05" (1/3) ... [2022-11-25 17:16:06,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643f69a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:16:06, skipping insertion in model container [2022-11-25 17:16:06,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:05" (2/3) ... [2022-11-25 17:16:06,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643f69a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:16:06, skipping insertion in model container [2022-11-25 17:16:06,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:16:06" (3/3) ... [2022-11-25 17:16:06,113 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2022-11-25 17:16:06,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:16:06,133 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:16:06,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:16:06,202 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;@5d73a5e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:16:06,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:16:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:06,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 17:16:06,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:06,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:06,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:06,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2022-11-25 17:16:06,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:06,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709794977] [2022-11-25 17:16:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:06,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:06,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709794977] [2022-11-25 17:16:06,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709794977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:06,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:06,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:16:06,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631183857] [2022-11-25 17:16:06,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:06,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:16:06,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:06,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:16:06,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:16:06,515 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:06,537 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2022-11-25 17:16:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:16:06,540 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-25 17:16:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:06,550 INFO L225 Difference]: With dead ends: 31 [2022-11-25 17:16:06,551 INFO L226 Difference]: Without dead ends: 13 [2022-11-25 17:16:06,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:16:06,559 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:06,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:16:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-25 17:16:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-25 17:16:06,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2022-11-25 17:16:06,600 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2022-11-25 17:16:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:06,601 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2022-11-25 17:16:06,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2022-11-25 17:16:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 17:16:06,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:06,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:06,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:16:06,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:06,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:06,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2022-11-25 17:16:06,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:06,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835467391] [2022-11-25 17:16:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:06,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:06,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:06,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835467391] [2022-11-25 17:16:06,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835467391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:06,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:06,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:16:06,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379479347] [2022-11-25 17:16:06,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:06,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:16:06,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:06,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:16:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:16:06,885 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:06,958 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2022-11-25 17:16:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:16:06,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-25 17:16:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:06,960 INFO L225 Difference]: With dead ends: 27 [2022-11-25 17:16:06,960 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 17:16:06,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:16:06,962 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:06,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:16:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 17:16:06,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-25 17:16:06,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2022-11-25 17:16:06,987 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 12 [2022-11-25 17:16:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:06,987 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2022-11-25 17:16:06,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2022-11-25 17:16:06,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:16:06,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:06,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:06,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:16:06,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:06,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:06,990 INFO L85 PathProgramCache]: Analyzing trace with hash 415981709, now seen corresponding path program 1 times [2022-11-25 17:16:06,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:06,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992153221] [2022-11-25 17:16:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:06,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:07,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:07,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992153221] [2022-11-25 17:16:07,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992153221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:07,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:07,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:16:07,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609549987] [2022-11-25 17:16:07,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:07,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:16:07,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:07,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:16:07,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:16:07,066 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:07,127 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2022-11-25 17:16:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:16:07,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 17:16:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:07,128 INFO L225 Difference]: With dead ends: 41 [2022-11-25 17:16:07,129 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 17:16:07,129 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 [2022-11-25 17:16:07,130 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:07,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:16:07,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 17:16:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-25 17:16:07,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 41 transitions. [2022-11-25 17:16:07,144 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 41 transitions. Word has length 13 [2022-11-25 17:16:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:07,145 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 41 transitions. [2022-11-25 17:16:07,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2022-11-25 17:16:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:16:07,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:07,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:07,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:16:07,147 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:07,147 INFO L85 PathProgramCache]: Analyzing trace with hash 461234238, now seen corresponding path program 1 times [2022-11-25 17:16:07,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:07,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896209670] [2022-11-25 17:16:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:07,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:07,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:07,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896209670] [2022-11-25 17:16:07,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896209670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:07,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:07,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:16:07,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937677750] [2022-11-25 17:16:07,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:07,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:16:07,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:07,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:16:07,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:16:07,196 INFO L87 Difference]: Start difference. First operand 28 states and 41 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:07,227 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-11-25 17:16:07,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:16:07,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 17:16:07,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:07,229 INFO L225 Difference]: With dead ends: 43 [2022-11-25 17:16:07,229 INFO L226 Difference]: Without dead ends: 32 [2022-11-25 17:16:07,230 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 [2022-11-25 17:16:07,231 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:07,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:16:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-25 17:16:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-25 17:16:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-11-25 17:16:07,259 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 13 [2022-11-25 17:16:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:07,260 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-11-25 17:16:07,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2022-11-25 17:16:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 17:16:07,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:07,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:07,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:16:07,264 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:07,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:07,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1348188691, now seen corresponding path program 1 times [2022-11-25 17:16:07,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:07,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628074514] [2022-11-25 17:16:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:07,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:16:07,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:07,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628074514] [2022-11-25 17:16:07,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628074514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:07,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:07,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:16:07,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295079386] [2022-11-25 17:16:07,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:07,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:16:07,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:07,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:16:07,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:16:07,440 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:07,517 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-11-25 17:16:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:16:07,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-25 17:16:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:07,519 INFO L225 Difference]: With dead ends: 41 [2022-11-25 17:16:07,521 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 17:16:07,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:16:07,523 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:07,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:16:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 17:16:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-25 17:16:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2022-11-25 17:16:07,557 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2022-11-25 17:16:07,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:07,558 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2022-11-25 17:16:07,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2022-11-25 17:16:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 17:16:07,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:07,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:07,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:16:07,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:07,564 INFO L85 PathProgramCache]: Analyzing trace with hash 121782348, now seen corresponding path program 1 times [2022-11-25 17:16:07,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:07,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760462446] [2022-11-25 17:16:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:07,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:16:07,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:07,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760462446] [2022-11-25 17:16:07,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760462446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:07,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434388819] [2022-11-25 17:16:07,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:07,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:07,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:07,721 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:07,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:16:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:07,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:16:07,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:16:07,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:16:07,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434388819] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:07,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:16:07,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2022-11-25 17:16:07,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313226462] [2022-11-25 17:16:07,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:07,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:16:07,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:16:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:16:07,916 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:07,953 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-11-25 17:16:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:16:07,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-25 17:16:07,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:07,955 INFO L225 Difference]: With dead ends: 35 [2022-11-25 17:16:07,955 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 17:16:07,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:16:07,957 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:07,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:16:07,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 17:16:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-25 17:16:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-11-25 17:16:07,965 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 15 [2022-11-25 17:16:07,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:07,966 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-11-25 17:16:07,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-11-25 17:16:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 17:16:07,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:07,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:07,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:08,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:16:08,173 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:08,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1019268824, now seen corresponding path program 1 times [2022-11-25 17:16:08,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:08,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604278262] [2022-11-25 17:16:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:08,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:16:08,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:08,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604278262] [2022-11-25 17:16:08,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604278262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:08,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950328695] [2022-11-25 17:16:08,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:08,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:08,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:08,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:08,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:16:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:08,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:16:08,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:08,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:16:08,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950328695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:08,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:08,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2022-11-25 17:16:08,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476493557] [2022-11-25 17:16:08,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:08,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:16:08,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:08,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:16:08,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:16:08,584 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:08,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:08,795 INFO L93 Difference]: Finished difference Result 103 states and 154 transitions. [2022-11-25 17:16:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:16:08,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 16 [2022-11-25 17:16:08,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:08,798 INFO L225 Difference]: With dead ends: 103 [2022-11-25 17:16:08,799 INFO L226 Difference]: Without dead ends: 86 [2022-11-25 17:16:08,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:16:08,800 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:08,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 74 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:16:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-25 17:16:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 53. [2022-11-25 17:16:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2022-11-25 17:16:08,840 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 16 [2022-11-25 17:16:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:08,841 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2022-11-25 17:16:08,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2022-11-25 17:16:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 17:16:08,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:08,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:08,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:09,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:16:09,048 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:09,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1475655800, now seen corresponding path program 1 times [2022-11-25 17:16:09,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:09,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100253086] [2022-11-25 17:16:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:09,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:16:09,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:09,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100253086] [2022-11-25 17:16:09,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100253086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:09,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894121896] [2022-11-25 17:16:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:09,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:09,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:09,189 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:09,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:16:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:16:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:16:09,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:16:09,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894121896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:09,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:09,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-25 17:16:09,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548405686] [2022-11-25 17:16:09,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:09,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:16:09,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:16:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:16:09,392 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:09,494 INFO L93 Difference]: Finished difference Result 101 states and 144 transitions. [2022-11-25 17:16:09,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:16:09,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-25 17:16:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:09,498 INFO L225 Difference]: With dead ends: 101 [2022-11-25 17:16:09,498 INFO L226 Difference]: Without dead ends: 94 [2022-11-25 17:16:09,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:16:09,506 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:09,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:16:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-25 17:16:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2022-11-25 17:16:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.5) internal successors, (96), 64 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 96 transitions. [2022-11-25 17:16:09,557 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 96 transitions. Word has length 16 [2022-11-25 17:16:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:09,558 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 96 transitions. [2022-11-25 17:16:09,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:09,559 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 96 transitions. [2022-11-25 17:16:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 17:16:09,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:09,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:09,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:09,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:09,771 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:09,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:09,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2038983293, now seen corresponding path program 1 times [2022-11-25 17:16:09,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:09,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199710744] [2022-11-25 17:16:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:09,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:16:09,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:09,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199710744] [2022-11-25 17:16:09,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199710744] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:09,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425873455] [2022-11-25 17:16:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:09,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:09,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:09,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:09,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:16:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:16:09,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:16:10,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:16:10,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425873455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:10,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:10,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-11-25 17:16:10,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881294683] [2022-11-25 17:16:10,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:10,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:16:10,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:10,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:16:10,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:16:10,207 INFO L87 Difference]: Start difference. First operand 65 states and 96 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:10,485 INFO L93 Difference]: Finished difference Result 141 states and 210 transitions. [2022-11-25 17:16:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:16:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 17 [2022-11-25 17:16:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:10,486 INFO L225 Difference]: With dead ends: 141 [2022-11-25 17:16:10,486 INFO L226 Difference]: Without dead ends: 112 [2022-11-25 17:16:10,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:16:10,489 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:10,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 72 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:16:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-25 17:16:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 90. [2022-11-25 17:16:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2022-11-25 17:16:10,545 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 17 [2022-11-25 17:16:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:10,546 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2022-11-25 17:16:10,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2022-11-25 17:16:10,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 17:16:10,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:10,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:10,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:10,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 17:16:10,754 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:10,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:10,754 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2022-11-25 17:16:10,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:10,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048779759] [2022-11-25 17:16:10,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:10,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:16:10,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:10,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048779759] [2022-11-25 17:16:10,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048779759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:10,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413315936] [2022-11-25 17:16:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:10,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:10,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:10,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:10,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:16:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:10,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:16:10,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:16:11,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:16:11,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413315936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:11,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:11,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-11-25 17:16:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207934900] [2022-11-25 17:16:11,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:11,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:16:11,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:16:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:16:11,084 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:11,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:11,190 INFO L93 Difference]: Finished difference Result 143 states and 207 transitions. [2022-11-25 17:16:11,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:16:11,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 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 18 [2022-11-25 17:16:11,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:11,192 INFO L225 Difference]: With dead ends: 143 [2022-11-25 17:16:11,192 INFO L226 Difference]: Without dead ends: 95 [2022-11-25 17:16:11,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:16:11,193 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:11,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:16:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-25 17:16:11,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2022-11-25 17:16:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.472972972972973) internal successors, (109), 74 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 109 transitions. [2022-11-25 17:16:11,227 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 109 transitions. Word has length 18 [2022-11-25 17:16:11,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:11,227 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 109 transitions. [2022-11-25 17:16:11,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 109 transitions. [2022-11-25 17:16:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 17:16:11,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:11,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:11,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:11,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:11,434 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:11,435 INFO L85 PathProgramCache]: Analyzing trace with hash 91906733, now seen corresponding path program 2 times [2022-11-25 17:16:11,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:11,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143208021] [2022-11-25 17:16:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:11,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:16:11,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:11,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143208021] [2022-11-25 17:16:11,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143208021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:11,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021877555] [2022-11-25 17:16:11,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:16:11,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:11,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:11,545 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:11,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:16:11,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:16:11,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:11,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:16:11,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:16:11,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:16:11,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021877555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:11,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:11,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-25 17:16:11,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907205651] [2022-11-25 17:16:11,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:11,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:16:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:16:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:16:11,749 INFO L87 Difference]: Start difference. First operand 75 states and 109 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:12,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:12,046 INFO L93 Difference]: Finished difference Result 138 states and 198 transitions. [2022-11-25 17:16:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:16:12,047 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2022-11-25 17:16:12,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:12,048 INFO L225 Difference]: With dead ends: 138 [2022-11-25 17:16:12,048 INFO L226 Difference]: Without dead ends: 94 [2022-11-25 17:16:12,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:16:12,049 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:12,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 73 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:16:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-25 17:16:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2022-11-25 17:16:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 69 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 103 transitions. [2022-11-25 17:16:12,089 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 103 transitions. Word has length 19 [2022-11-25 17:16:12,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:12,091 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 103 transitions. [2022-11-25 17:16:12,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 103 transitions. [2022-11-25 17:16:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 17:16:12,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:12,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:12,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:12,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:12,299 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:12,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1779216382, now seen corresponding path program 2 times [2022-11-25 17:16:12,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:12,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326495119] [2022-11-25 17:16:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:12,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:12,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:12,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326495119] [2022-11-25 17:16:12,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326495119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:12,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608611961] [2022-11-25 17:16:12,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:16:12,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:12,502 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:12,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:16:12,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:16:12,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:12,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:16:12,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:16:12,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:16:12,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608611961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:12,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:12,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-11-25 17:16:12,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973520553] [2022-11-25 17:16:12,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:12,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:16:12,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:12,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:16:12,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:16:12,657 INFO L87 Difference]: Start difference. First operand 70 states and 103 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:13,440 INFO L93 Difference]: Finished difference Result 186 states and 255 transitions. [2022-11-25 17:16:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:16:13,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 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 19 [2022-11-25 17:16:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:13,441 INFO L225 Difference]: With dead ends: 186 [2022-11-25 17:16:13,441 INFO L226 Difference]: Without dead ends: 152 [2022-11-25 17:16:13,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 17:16:13,443 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 101 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:13,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 139 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:16:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-25 17:16:13,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 89. [2022-11-25 17:16:13,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3636363636363635) internal successors, (120), 88 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2022-11-25 17:16:13,498 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 19 [2022-11-25 17:16:13,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:13,499 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2022-11-25 17:16:13,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:13,499 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2022-11-25 17:16:13,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 17:16:13,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:13,500 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:13,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:13,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:13,706 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:13,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2078405228, now seen corresponding path program 3 times [2022-11-25 17:16:13,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:13,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407456607] [2022-11-25 17:16:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:13,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:16:13,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407456607] [2022-11-25 17:16:13,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407456607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863143597] [2022-11-25 17:16:13,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:16:13,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:13,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:13,880 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:13,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:16:13,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:16:13,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:13,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:16:13,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:16:14,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:16:14,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863143597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:14,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:14,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 14 [2022-11-25 17:16:14,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68697697] [2022-11-25 17:16:14,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:14,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:16:14,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:16:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:16:14,116 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:14,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:14,954 INFO L93 Difference]: Finished difference Result 208 states and 292 transitions. [2022-11-25 17:16:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:16:14,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 21 [2022-11-25 17:16:14,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:14,955 INFO L225 Difference]: With dead ends: 208 [2022-11-25 17:16:14,955 INFO L226 Difference]: Without dead ends: 141 [2022-11-25 17:16:14,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 17:16:14,957 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 87 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:14,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 182 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:16:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-25 17:16:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2022-11-25 17:16:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 84 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-11-25 17:16:15,009 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 21 [2022-11-25 17:16:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:15,010 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-11-25 17:16:15,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-11-25 17:16:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 17:16:15,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:15,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:15,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:15,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:16:15,216 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash 856330056, now seen corresponding path program 3 times [2022-11-25 17:16:15,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:15,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594737442] [2022-11-25 17:16:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:15,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:15,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:15,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594737442] [2022-11-25 17:16:15,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594737442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:15,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458586330] [2022-11-25 17:16:15,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:16:15,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:15,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:15,513 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:15,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:16:15,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:16:15,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:15,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:16:15,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:15,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:15,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458586330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:15,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:15,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 9] total 23 [2022-11-25 17:16:15,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846618501] [2022-11-25 17:16:15,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:15,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:16:15,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:15,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:16:15,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:16:15,976 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:17,441 INFO L93 Difference]: Finished difference Result 183 states and 269 transitions. [2022-11-25 17:16:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 17:16:17,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 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 22 [2022-11-25 17:16:17,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:17,443 INFO L225 Difference]: With dead ends: 183 [2022-11-25 17:16:17,443 INFO L226 Difference]: Without dead ends: 147 [2022-11-25 17:16:17,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:16:17,445 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:17,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 147 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:16:17,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-25 17:16:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2022-11-25 17:16:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3666666666666667) internal successors, (164), 120 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 164 transitions. [2022-11-25 17:16:17,499 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 164 transitions. Word has length 22 [2022-11-25 17:16:17,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:17,500 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 164 transitions. [2022-11-25 17:16:17,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 164 transitions. [2022-11-25 17:16:17,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 17:16:17,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:17,501 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:17,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:17,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:16:17,712 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:17,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:17,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1531208008, now seen corresponding path program 4 times [2022-11-25 17:16:17,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:17,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342651562] [2022-11-25 17:16:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:17,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:16:17,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:17,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342651562] [2022-11-25 17:16:17,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342651562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:17,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694967739] [2022-11-25 17:16:17,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:16:17,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:17,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:17,964 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:17,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:16:18,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:16:18,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:18,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:16:18,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:16:18,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:16:18,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694967739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:18,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:18,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-11-25 17:16:18,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035656884] [2022-11-25 17:16:18,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:18,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:16:18,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:18,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:16:18,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:16:18,167 INFO L87 Difference]: Start difference. First operand 121 states and 164 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:21,036 INFO L93 Difference]: Finished difference Result 421 states and 594 transitions. [2022-11-25 17:16:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-25 17:16:21,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 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 22 [2022-11-25 17:16:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:21,039 INFO L225 Difference]: With dead ends: 421 [2022-11-25 17:16:21,039 INFO L226 Difference]: Without dead ends: 349 [2022-11-25 17:16:21,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=534, Invalid=5318, Unknown=0, NotChecked=0, Total=5852 [2022-11-25 17:16:21,044 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 208 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:21,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 355 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 17:16:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-25 17:16:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 168. [2022-11-25 17:16:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.3832335329341316) internal successors, (231), 167 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 231 transitions. [2022-11-25 17:16:21,127 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 231 transitions. Word has length 22 [2022-11-25 17:16:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:21,127 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 231 transitions. [2022-11-25 17:16:21,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 231 transitions. [2022-11-25 17:16:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 17:16:21,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:21,129 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:21,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 17:16:21,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:16:21,334 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:21,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:21,335 INFO L85 PathProgramCache]: Analyzing trace with hash -425830760, now seen corresponding path program 2 times [2022-11-25 17:16:21,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:21,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603245799] [2022-11-25 17:16:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:21,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:21,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:21,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603245799] [2022-11-25 17:16:21,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603245799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:21,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898407397] [2022-11-25 17:16:21,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:16:21,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:21,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:21,548 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:21,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:16:21,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:16:21,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:21,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:16:21,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:21,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 17:16:21,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898407397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:21,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:21,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 7] total 19 [2022-11-25 17:16:21,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933524046] [2022-11-25 17:16:21,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:21,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:16:21,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:21,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:16:21,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:16:21,951 INFO L87 Difference]: Start difference. First operand 168 states and 231 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:22,569 INFO L93 Difference]: Finished difference Result 378 states and 564 transitions. [2022-11-25 17:16:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:16:22,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 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 24 [2022-11-25 17:16:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:22,571 INFO L225 Difference]: With dead ends: 378 [2022-11-25 17:16:22,572 INFO L226 Difference]: Without dead ends: 303 [2022-11-25 17:16:22,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:16:22,573 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 119 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:22,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 270 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:16:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-25 17:16:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 207. [2022-11-25 17:16:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3737864077669903) internal successors, (283), 206 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 283 transitions. [2022-11-25 17:16:22,650 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 283 transitions. Word has length 24 [2022-11-25 17:16:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:22,651 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 283 transitions. [2022-11-25 17:16:22,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 283 transitions. [2022-11-25 17:16:22,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 17:16:22,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:22,652 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:22,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:22,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:16:22,858 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:22,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1713191597, now seen corresponding path program 4 times [2022-11-25 17:16:22,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:22,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778220691] [2022-11-25 17:16:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:22,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:16:23,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:23,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778220691] [2022-11-25 17:16:23,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778220691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:23,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529647823] [2022-11-25 17:16:23,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:16:23,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:23,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:23,051 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:23,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:16:23,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:16:23,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:16:23,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 17:16:23,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 17:16:23,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529647823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:23,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:23,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-11-25 17:16:23,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164688453] [2022-11-25 17:16:23,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:23,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:16:23,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:16:23,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:16:23,247 INFO L87 Difference]: Start difference. First operand 207 states and 283 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:25,267 INFO L93 Difference]: Finished difference Result 494 states and 651 transitions. [2022-11-25 17:16:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-25 17:16:25,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 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 25 [2022-11-25 17:16:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:25,269 INFO L225 Difference]: With dead ends: 494 [2022-11-25 17:16:25,270 INFO L226 Difference]: Without dead ends: 433 [2022-11-25 17:16:25,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=3785, Unknown=0, NotChecked=0, Total=4160 [2022-11-25 17:16:25,272 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 213 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:25,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 216 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:16:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-25 17:16:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 207. [2022-11-25 17:16:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3640776699029127) internal successors, (281), 206 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 281 transitions. [2022-11-25 17:16:25,358 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 281 transitions. Word has length 25 [2022-11-25 17:16:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:25,358 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 281 transitions. [2022-11-25 17:16:25,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 281 transitions. [2022-11-25 17:16:25,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 17:16:25,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:25,359 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:25,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:25,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:16:25,570 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:25,570 INFO L85 PathProgramCache]: Analyzing trace with hash -235040834, now seen corresponding path program 5 times [2022-11-25 17:16:25,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:25,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597881159] [2022-11-25 17:16:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:25,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:25,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:25,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597881159] [2022-11-25 17:16:25,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597881159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:25,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850671063] [2022-11-25 17:16:25,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:16:25,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:25,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:25,875 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:25,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:16:25,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:16:25,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:25,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:16:25,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:26,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:16:26,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850671063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:26,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:26,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 11] total 28 [2022-11-25 17:16:26,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501953496] [2022-11-25 17:16:26,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:26,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:16:26,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:26,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:16:26,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:16:26,477 INFO L87 Difference]: Start difference. First operand 207 states and 281 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:28,670 INFO L93 Difference]: Finished difference Result 413 states and 608 transitions. [2022-11-25 17:16:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-25 17:16:28,671 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 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 25 [2022-11-25 17:16:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:28,673 INFO L225 Difference]: With dead ends: 413 [2022-11-25 17:16:28,673 INFO L226 Difference]: Without dead ends: 354 [2022-11-25 17:16:28,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1036, Invalid=3254, Unknown=0, NotChecked=0, Total=4290 [2022-11-25 17:16:28,676 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 219 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:28,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 221 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:16:28,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-25 17:16:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 243. [2022-11-25 17:16:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.359504132231405) internal successors, (329), 242 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 329 transitions. [2022-11-25 17:16:28,866 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 329 transitions. Word has length 25 [2022-11-25 17:16:28,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:28,866 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 329 transitions. [2022-11-25 17:16:28,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 329 transitions. [2022-11-25 17:16:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 17:16:28,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:28,868 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:28,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:29,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:16:29,069 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:29,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:29,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1282371252, now seen corresponding path program 6 times [2022-11-25 17:16:29,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:29,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835162311] [2022-11-25 17:16:29,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:29,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:16:29,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:29,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835162311] [2022-11-25 17:16:29,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835162311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:29,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027941655] [2022-11-25 17:16:29,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:16:29,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:29,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:29,331 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:29,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:16:29,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 17:16:29,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:29,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:16:29,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 17:16:29,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 17:16:29,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027941655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:29,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:29,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2022-11-25 17:16:29,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559118418] [2022-11-25 17:16:29,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:29,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:16:29,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:29,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:16:29,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:16:29,596 INFO L87 Difference]: Start difference. First operand 243 states and 329 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:34,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:34,352 INFO L93 Difference]: Finished difference Result 726 states and 927 transitions. [2022-11-25 17:16:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-25 17:16:34,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 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 27 [2022-11-25 17:16:34,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:34,355 INFO L225 Difference]: With dead ends: 726 [2022-11-25 17:16:34,355 INFO L226 Difference]: Without dead ends: 661 [2022-11-25 17:16:34,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3853 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=960, Invalid=10170, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 17:16:34,360 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 303 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:34,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 374 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 17:16:34,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-11-25 17:16:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 258. [2022-11-25 17:16:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.3579766536964981) internal successors, (349), 257 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 349 transitions. [2022-11-25 17:16:34,481 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 349 transitions. Word has length 27 [2022-11-25 17:16:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:34,481 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 349 transitions. [2022-11-25 17:16:34,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 349 transitions. [2022-11-25 17:16:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 17:16:34,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:34,483 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:34,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:34,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:34,685 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:34,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:34,686 INFO L85 PathProgramCache]: Analyzing trace with hash -866986772, now seen corresponding path program 1 times [2022-11-25 17:16:34,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:34,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687609947] [2022-11-25 17:16:34,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:34,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:16:34,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:34,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687609947] [2022-11-25 17:16:34,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687609947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:34,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609942350] [2022-11-25 17:16:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:34,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:34,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:34,915 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:34,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:16:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:34,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 17:16:34,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:35,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 17:16:35,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609942350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:35,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:35,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 5] total 16 [2022-11-25 17:16:35,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212986983] [2022-11-25 17:16:35,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:35,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:16:35,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:16:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:16:35,135 INFO L87 Difference]: Start difference. First operand 258 states and 349 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:35,863 INFO L93 Difference]: Finished difference Result 520 states and 765 transitions. [2022-11-25 17:16:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:16:35,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 27 [2022-11-25 17:16:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:35,865 INFO L225 Difference]: With dead ends: 520 [2022-11-25 17:16:35,866 INFO L226 Difference]: Without dead ends: 457 [2022-11-25 17:16:35,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:16:35,867 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 111 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:35,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 375 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:16:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-25 17:16:35,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 320. [2022-11-25 17:16:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.3573667711598747) internal successors, (433), 319 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 433 transitions. [2022-11-25 17:16:35,988 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 433 transitions. Word has length 27 [2022-11-25 17:16:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:35,988 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 433 transitions. [2022-11-25 17:16:35,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 433 transitions. [2022-11-25 17:16:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 17:16:35,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:35,990 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:36,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:36,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:36,195 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:36,196 INFO L85 PathProgramCache]: Analyzing trace with hash 967140136, now seen corresponding path program 3 times [2022-11-25 17:16:36,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:36,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104118758] [2022-11-25 17:16:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:36,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:16:36,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:36,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104118758] [2022-11-25 17:16:36,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104118758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:36,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630019573] [2022-11-25 17:16:36,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:16:36,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:36,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:36,341 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:36,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:16:36,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:16:36,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:36,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:16:36,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:16:36,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:16:36,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630019573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:36,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:36,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-25 17:16:36,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649689525] [2022-11-25 17:16:36,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:36,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:16:36,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:36,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:16:36,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:16:36,527 INFO L87 Difference]: Start difference. First operand 320 states and 433 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:37,076 INFO L93 Difference]: Finished difference Result 521 states and 677 transitions. [2022-11-25 17:16:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:16:37,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 28 [2022-11-25 17:16:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:37,079 INFO L225 Difference]: With dead ends: 521 [2022-11-25 17:16:37,079 INFO L226 Difference]: Without dead ends: 494 [2022-11-25 17:16:37,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:16:37,080 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:37,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 101 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:16:37,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-11-25 17:16:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 325. [2022-11-25 17:16:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.3487654320987654) internal successors, (437), 324 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 437 transitions. [2022-11-25 17:16:37,225 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 437 transitions. Word has length 28 [2022-11-25 17:16:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:37,225 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 437 transitions. [2022-11-25 17:16:37,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 437 transitions. [2022-11-25 17:16:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 17:16:37,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:37,227 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:37,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:37,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 17:16:37,432 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:37,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash -18086136, now seen corresponding path program 7 times [2022-11-25 17:16:37,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:37,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297172969] [2022-11-25 17:16:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:37,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:37,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:37,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297172969] [2022-11-25 17:16:37,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297172969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:37,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093385753] [2022-11-25 17:16:37,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:16:37,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:37,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:37,758 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:37,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:16:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:37,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:16:37,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:16:37,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:16:38,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093385753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:38,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:38,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2022-11-25 17:16:38,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082273071] [2022-11-25 17:16:38,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:38,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:16:38,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:38,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:16:38,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:16:38,021 INFO L87 Difference]: Start difference. First operand 325 states and 437 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:51,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:51,596 INFO L93 Difference]: Finished difference Result 1049 states and 1343 transitions. [2022-11-25 17:16:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-11-25 17:16:51,599 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 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 28 [2022-11-25 17:16:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:51,603 INFO L225 Difference]: With dead ends: 1049 [2022-11-25 17:16:51,604 INFO L226 Difference]: Without dead ends: 984 [2022-11-25 17:16:51,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14594 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=2296, Invalid=34376, Unknown=0, NotChecked=0, Total=36672 [2022-11-25 17:16:51,612 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 579 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:51,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 465 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-25 17:16:51,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-11-25 17:16:51,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 356. [2022-11-25 17:16:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.3549295774647887) internal successors, (481), 355 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 481 transitions. [2022-11-25 17:16:51,829 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 481 transitions. Word has length 28 [2022-11-25 17:16:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:51,829 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 481 transitions. [2022-11-25 17:16:51,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:51,829 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 481 transitions. [2022-11-25 17:16:51,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:16:51,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:51,830 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:51,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:52,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 17:16:52,031 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:52,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2063179469, now seen corresponding path program 4 times [2022-11-25 17:16:52,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:52,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615465140] [2022-11-25 17:16:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:52,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:16:52,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:52,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615465140] [2022-11-25 17:16:52,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615465140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:52,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101106366] [2022-11-25 17:16:52,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:16:52,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:52,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:52,303 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:52,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:16:52,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:16:52,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:52,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:16:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:16:52,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-25 17:16:52,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101106366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:52,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:52,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 5] total 17 [2022-11-25 17:16:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369447347] [2022-11-25 17:16:52,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:52,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:16:52,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:52,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:16:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:16:52,549 INFO L87 Difference]: Start difference. First operand 356 states and 481 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:53,554 INFO L93 Difference]: Finished difference Result 665 states and 975 transitions. [2022-11-25 17:16:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:16:53,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 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 29 [2022-11-25 17:16:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:53,556 INFO L225 Difference]: With dead ends: 665 [2022-11-25 17:16:53,556 INFO L226 Difference]: Without dead ends: 587 [2022-11-25 17:16:53,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-11-25 17:16:53,557 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 145 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:53,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 467 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:16:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-25 17:16:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 347. [2022-11-25 17:16:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.3728323699421965) internal successors, (475), 346 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 475 transitions. [2022-11-25 17:16:53,748 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 475 transitions. Word has length 29 [2022-11-25 17:16:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:53,749 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 475 transitions. [2022-11-25 17:16:53,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 475 transitions. [2022-11-25 17:16:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 17:16:53,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:53,750 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:53,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-25 17:16:53,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:53,951 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 5 times [2022-11-25 17:16:53,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:53,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996125880] [2022-11-25 17:16:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:53,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:16:54,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:54,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996125880] [2022-11-25 17:16:54,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996125880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:54,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748867252] [2022-11-25 17:16:54,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:16:54,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:54,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:54,231 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:54,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:16:54,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:16:54,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:54,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:16:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:16:54,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:16:54,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748867252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:54,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:54,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-11-25 17:16:54,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494710041] [2022-11-25 17:16:54,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:54,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:16:54,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:54,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:16:54,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:16:54,584 INFO L87 Difference]: Start difference. First operand 347 states and 475 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:55,347 INFO L93 Difference]: Finished difference Result 577 states and 777 transitions. [2022-11-25 17:16:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:16:55,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 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 30 [2022-11-25 17:16:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:55,351 INFO L225 Difference]: With dead ends: 577 [2022-11-25 17:16:55,351 INFO L226 Difference]: Without dead ends: 462 [2022-11-25 17:16:55,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:16:55,353 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:55,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 152 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:16:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-25 17:16:55,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 340. [2022-11-25 17:16:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.3716814159292035) internal successors, (465), 339 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 465 transitions. [2022-11-25 17:16:55,682 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 465 transitions. Word has length 30 [2022-11-25 17:16:55,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:55,682 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 465 transitions. [2022-11-25 17:16:55,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 465 transitions. [2022-11-25 17:16:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 17:16:55,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:55,686 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:55,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:55,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 17:16:55,891 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1329509959, now seen corresponding path program 6 times [2022-11-25 17:16:55,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:55,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73334538] [2022-11-25 17:16:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:55,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 17:16:56,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:56,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73334538] [2022-11-25 17:16:56,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73334538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:56,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555036405] [2022-11-25 17:16:56,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:16:56,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:56,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:56,154 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:56,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:16:56,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:16:56,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:56,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:16:56,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 17:16:56,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 17:16:56,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555036405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:56,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:56,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-11-25 17:16:56,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802993044] [2022-11-25 17:16:56,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:56,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:16:56,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:56,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:16:56,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:16:56,395 INFO L87 Difference]: Start difference. First operand 340 states and 465 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:57,744 INFO L93 Difference]: Finished difference Result 712 states and 937 transitions. [2022-11-25 17:16:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:16:57,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 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 30 [2022-11-25 17:16:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:57,747 INFO L225 Difference]: With dead ends: 712 [2022-11-25 17:16:57,747 INFO L226 Difference]: Without dead ends: 650 [2022-11-25 17:16:57,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:16:57,749 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 133 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:57,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 231 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:16:57,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-11-25 17:16:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 369. [2022-11-25 17:16:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.3423913043478262) internal successors, (494), 368 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 494 transitions. [2022-11-25 17:16:58,001 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 494 transitions. Word has length 30 [2022-11-25 17:16:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:58,002 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 494 transitions. [2022-11-25 17:16:58,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:58,002 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 494 transitions. [2022-11-25 17:16:58,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 17:16:58,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:58,003 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:58,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:58,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 17:16:58,207 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:58,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1974452903, now seen corresponding path program 5 times [2022-11-25 17:16:58,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:58,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67314897] [2022-11-25 17:16:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:58,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 17:16:58,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:58,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67314897] [2022-11-25 17:16:58,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67314897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:58,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392475180] [2022-11-25 17:16:58,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:16:58,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:58,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:58,412 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:58,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:16:58,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 17:16:58,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:58,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 17:16:58,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 17:16:58,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 17:16:58,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392475180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:58,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:58,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 21 [2022-11-25 17:16:58,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402083390] [2022-11-25 17:16:58,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:58,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:16:58,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:58,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:16:58,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:16:58,926 INFO L87 Difference]: Start difference. First operand 369 states and 494 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:00,683 INFO L93 Difference]: Finished difference Result 555 states and 751 transitions. [2022-11-25 17:17:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 17:17:00,683 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 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 30 [2022-11-25 17:17:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:00,685 INFO L225 Difference]: With dead ends: 555 [2022-11-25 17:17:00,685 INFO L226 Difference]: Without dead ends: 432 [2022-11-25 17:17:00,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 17:17:00,686 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 100 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:00,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 309 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:17:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-25 17:17:00,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 350. [2022-11-25 17:17:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.33810888252149) internal successors, (467), 349 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 467 transitions. [2022-11-25 17:17:00,928 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 467 transitions. Word has length 30 [2022-11-25 17:17:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:00,928 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 467 transitions. [2022-11-25 17:17:00,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 467 transitions. [2022-11-25 17:17:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 17:17:00,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:00,930 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:00,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:01,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:01,135 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1370456194, now seen corresponding path program 8 times [2022-11-25 17:17:01,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:01,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325085006] [2022-11-25 17:17:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:01,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:01,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:01,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325085006] [2022-11-25 17:17:01,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325085006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:01,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903691184] [2022-11-25 17:17:01,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:17:01,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:01,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:01,504 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:01,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:17:01,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:17:01,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:01,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:17:01,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 17:17:01,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 17:17:01,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903691184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:01,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:01,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2022-11-25 17:17:01,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29912356] [2022-11-25 17:17:01,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:01,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:17:01,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:01,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:17:01,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:17:01,832 INFO L87 Difference]: Start difference. First operand 350 states and 467 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:26,492 INFO L93 Difference]: Finished difference Result 1250 states and 1586 transitions. [2022-11-25 17:17:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-11-25 17:17:26,492 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 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 31 [2022-11-25 17:17:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:26,496 INFO L225 Difference]: With dead ends: 1250 [2022-11-25 17:17:26,496 INFO L226 Difference]: Without dead ends: 1170 [2022-11-25 17:17:26,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25149 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=3342, Invalid=57914, Unknown=0, NotChecked=0, Total=61256 [2022-11-25 17:17:26,502 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 665 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 3204 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 3576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 3204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:26,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 700 Invalid, 3576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 3204 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-25 17:17:26,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-11-25 17:17:26,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 409. [2022-11-25 17:17:26,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.3333333333333333) internal successors, (544), 408 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 544 transitions. [2022-11-25 17:17:26,902 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 544 transitions. Word has length 31 [2022-11-25 17:17:26,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:26,903 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 544 transitions. [2022-11-25 17:17:26,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:26,903 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 544 transitions. [2022-11-25 17:17:26,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 17:17:26,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:26,904 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:26,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:27,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 17:17:27,110 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:27,110 INFO L85 PathProgramCache]: Analyzing trace with hash 306595180, now seen corresponding path program 2 times [2022-11-25 17:17:27,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:27,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958360093] [2022-11-25 17:17:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:27,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:17:27,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:27,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958360093] [2022-11-25 17:17:27,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958360093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:27,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758180855] [2022-11-25 17:17:27,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:17:27,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:27,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:27,438 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:27,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:17:27,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:17:27,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:27,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 17:17:27,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 17:17:27,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-25 17:17:27,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758180855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:27,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:27,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 8] total 25 [2022-11-25 17:17:27,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770082530] [2022-11-25 17:17:27,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:27,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:17:27,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:27,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:17:27,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:17:27,857 INFO L87 Difference]: Start difference. First operand 409 states and 544 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:29,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:29,446 INFO L93 Difference]: Finished difference Result 793 states and 1152 transitions. [2022-11-25 17:17:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 17:17:29,446 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 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 31 [2022-11-25 17:17:29,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:29,448 INFO L225 Difference]: With dead ends: 793 [2022-11-25 17:17:29,449 INFO L226 Difference]: Without dead ends: 688 [2022-11-25 17:17:29,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=966, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 17:17:29,450 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 202 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:29,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 612 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:17:29,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-11-25 17:17:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 456. [2022-11-25 17:17:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.3296703296703296) internal successors, (605), 455 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 605 transitions. [2022-11-25 17:17:29,804 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 605 transitions. Word has length 31 [2022-11-25 17:17:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:29,804 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 605 transitions. [2022-11-25 17:17:29,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 605 transitions. [2022-11-25 17:17:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 17:17:29,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:29,806 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:29,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:30,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 17:17:30,010 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:30,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:30,011 INFO L85 PathProgramCache]: Analyzing trace with hash 541073756, now seen corresponding path program 3 times [2022-11-25 17:17:30,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:30,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834302907] [2022-11-25 17:17:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:30,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:17:30,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:30,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834302907] [2022-11-25 17:17:30,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834302907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:30,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557694133] [2022-11-25 17:17:30,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:17:30,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:30,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:30,332 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:30,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 17:17:30,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:17:30,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:30,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:17:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-25 17:17:30,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-25 17:17:30,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557694133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:30,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:30,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 21 [2022-11-25 17:17:30,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666556606] [2022-11-25 17:17:30,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:30,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:17:30,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:30,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:17:30,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:17:30,553 INFO L87 Difference]: Start difference. First operand 456 states and 605 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:34,698 INFO L93 Difference]: Finished difference Result 834 states and 1179 transitions. [2022-11-25 17:17:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-25 17:17:34,699 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-25 17:17:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:34,702 INFO L225 Difference]: With dead ends: 834 [2022-11-25 17:17:34,702 INFO L226 Difference]: Without dead ends: 636 [2022-11-25 17:17:34,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=784, Invalid=8918, Unknown=0, NotChecked=0, Total=9702 [2022-11-25 17:17:34,704 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 150 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:34,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 526 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 17:17:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-11-25 17:17:35,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 471. [2022-11-25 17:17:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.325531914893617) internal successors, (623), 470 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 623 transitions. [2022-11-25 17:17:35,170 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 623 transitions. Word has length 33 [2022-11-25 17:17:35,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:35,170 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 623 transitions. [2022-11-25 17:17:35,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 623 transitions. [2022-11-25 17:17:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 17:17:35,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:35,172 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:35,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:35,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 17:17:35,377 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:35,378 INFO L85 PathProgramCache]: Analyzing trace with hash 89661625, now seen corresponding path program 6 times [2022-11-25 17:17:35,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:35,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135742120] [2022-11-25 17:17:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:35,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 17:17:35,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:35,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135742120] [2022-11-25 17:17:35,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135742120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:35,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830578525] [2022-11-25 17:17:35,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:17:35,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:35,720 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:35,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 17:17:35,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-25 17:17:35,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:35,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 17:17:35,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 17:17:36,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 17:17:36,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830578525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:36,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:36,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2022-11-25 17:17:36,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944850163] [2022-11-25 17:17:36,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:36,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:17:36,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:36,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:17:36,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:17:36,146 INFO L87 Difference]: Start difference. First operand 471 states and 623 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:17:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:59,477 INFO L93 Difference]: Finished difference Result 1586 states and 1925 transitions. [2022-11-25 17:17:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2022-11-25 17:17:59,477 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 34 [2022-11-25 17:17:59,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:59,480 INFO L225 Difference]: With dead ends: 1586 [2022-11-25 17:17:59,480 INFO L226 Difference]: Without dead ends: 1473 [2022-11-25 17:17:59,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25302 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=3464, Invalid=57792, Unknown=0, NotChecked=0, Total=61256 [2022-11-25 17:17:59,483 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 693 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:59,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 699 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-25 17:17:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2022-11-25 17:18:00,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 433. [2022-11-25 17:18:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.337962962962963) internal successors, (578), 432 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 578 transitions. [2022-11-25 17:18:00,068 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 578 transitions. Word has length 34 [2022-11-25 17:18:00,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:00,068 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 578 transitions. [2022-11-25 17:18:00,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 578 transitions. [2022-11-25 17:18:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 17:18:00,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:00,070 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:00,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:00,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:00,275 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash 386903752, now seen corresponding path program 9 times [2022-11-25 17:18:00,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:00,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503943173] [2022-11-25 17:18:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:00,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:00,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:00,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503943173] [2022-11-25 17:18:00,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503943173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:00,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543274603] [2022-11-25 17:18:00,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:18:00,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:00,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:00,751 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:00,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 17:18:00,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 17:18:00,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:00,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 17:18:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:01,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 17:18:01,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543274603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:01,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:01,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 17] total 43 [2022-11-25 17:18:01,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284171898] [2022-11-25 17:18:01,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:01,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 17:18:01,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:01,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 17:18:01,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1437, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 17:18:01,894 INFO L87 Difference]: Start difference. First operand 433 states and 578 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:12,142 INFO L93 Difference]: Finished difference Result 875 states and 1307 transitions. [2022-11-25 17:18:12,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-25 17:18:12,147 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 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 34 [2022-11-25 17:18:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:12,150 INFO L225 Difference]: With dead ends: 875 [2022-11-25 17:18:12,150 INFO L226 Difference]: Without dead ends: 790 [2022-11-25 17:18:12,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=4175, Invalid=13647, Unknown=0, NotChecked=0, Total=17822 [2022-11-25 17:18:12,152 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 554 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 3671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:12,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 707 Invalid, 3671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-25 17:18:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-25 17:18:12,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 510. [2022-11-25 17:18:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.343811394891945) internal successors, (684), 509 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 684 transitions. [2022-11-25 17:18:12,603 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 684 transitions. Word has length 34 [2022-11-25 17:18:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:12,603 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 684 transitions. [2022-11-25 17:18:12,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 684 transitions. [2022-11-25 17:18:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 17:18:12,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:12,605 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:12,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-25 17:18:12,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-25 17:18:12,811 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:12,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:12,811 INFO L85 PathProgramCache]: Analyzing trace with hash -557084594, now seen corresponding path program 4 times [2022-11-25 17:18:12,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:12,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62145312] [2022-11-25 17:18:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:12,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:18:13,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:13,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62145312] [2022-11-25 17:18:13,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62145312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:13,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894559618] [2022-11-25 17:18:13,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:18:13,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:13,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:13,140 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:13,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 17:18:13,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:18:13,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:13,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:18:13,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:18:13,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-25 17:18:13,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894559618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:13,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:13,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 6] total 22 [2022-11-25 17:18:13,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306950923] [2022-11-25 17:18:13,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:13,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:18:13,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:13,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:18:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:18:13,452 INFO L87 Difference]: Start difference. First operand 510 states and 684 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:15,503 INFO L93 Difference]: Finished difference Result 971 states and 1415 transitions. [2022-11-25 17:18:15,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 17:18:15,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-25 17:18:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:15,507 INFO L225 Difference]: With dead ends: 971 [2022-11-25 17:18:15,507 INFO L226 Difference]: Without dead ends: 860 [2022-11-25 17:18:15,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=321, Invalid=1011, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 17:18:15,508 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 247 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:15,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 776 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:18:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-25 17:18:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 586. [2022-11-25 17:18:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.34017094017094) internal successors, (784), 585 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:15,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 784 transitions. [2022-11-25 17:18:16,000 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 784 transitions. Word has length 35 [2022-11-25 17:18:16,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:16,000 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 784 transitions. [2022-11-25 17:18:16,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:16,001 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 784 transitions. [2022-11-25 17:18:16,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 17:18:16,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:16,002 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:16,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:16,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:16,215 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:16,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1563221799, now seen corresponding path program 7 times [2022-11-25 17:18:16,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:16,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981417861] [2022-11-25 17:18:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:16,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 17:18:16,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:16,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981417861] [2022-11-25 17:18:16,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981417861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:16,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920276163] [2022-11-25 17:18:16,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:18:16,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:16,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:16,533 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:16,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 17:18:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:16,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:18:16,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 17:18:16,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 17:18:16,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920276163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:16,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:16,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-11-25 17:18:16,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143125364] [2022-11-25 17:18:16,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:16,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:18:16,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:16,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:18:16,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:18:16,691 INFO L87 Difference]: Start difference. First operand 586 states and 784 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:18,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:18,206 INFO L93 Difference]: Finished difference Result 988 states and 1283 transitions. [2022-11-25 17:18:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:18:18,207 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 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 36 [2022-11-25 17:18:18,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:18,208 INFO L225 Difference]: With dead ends: 988 [2022-11-25 17:18:18,208 INFO L226 Difference]: Without dead ends: 836 [2022-11-25 17:18:18,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:18:18,209 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:18,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 224 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:18:18,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-25 17:18:18,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 575. [2022-11-25 17:18:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3379790940766552) internal successors, (768), 574 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 768 transitions. [2022-11-25 17:18:18,737 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 768 transitions. Word has length 36 [2022-11-25 17:18:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:18,737 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 768 transitions. [2022-11-25 17:18:18,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 768 transitions. [2022-11-25 17:18:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 17:18:18,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:18,738 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:18,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:18,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:18,939 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:18,939 INFO L85 PathProgramCache]: Analyzing trace with hash -922807928, now seen corresponding path program 8 times [2022-11-25 17:18:18,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:18,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478295177] [2022-11-25 17:18:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:18,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 17:18:19,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478295177] [2022-11-25 17:18:19,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478295177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084022409] [2022-11-25 17:18:19,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:18:19,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:19,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:19,249 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:19,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 17:18:19,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:18:19,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:19,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:18:19,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 17:18:19,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 17:18:19,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084022409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:19,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:19,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2022-11-25 17:18:19,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406313584] [2022-11-25 17:18:19,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:19,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:18:19,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:19,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:18:19,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:18:19,520 INFO L87 Difference]: Start difference. First operand 575 states and 768 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:18:23,471 INFO L93 Difference]: Finished difference Result 1389 states and 1766 transitions. [2022-11-25 17:18:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 17:18:23,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 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 36 [2022-11-25 17:18:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:18:23,474 INFO L225 Difference]: With dead ends: 1389 [2022-11-25 17:18:23,474 INFO L226 Difference]: Without dead ends: 1308 [2022-11-25 17:18:23,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2022-11-25 17:18:23,476 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 225 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:18:23,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 274 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:18:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-11-25 17:18:24,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 681. [2022-11-25 17:18:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.3205882352941176) internal successors, (898), 680 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 898 transitions. [2022-11-25 17:18:24,162 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 898 transitions. Word has length 36 [2022-11-25 17:18:24,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:18:24,162 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 898 transitions. [2022-11-25 17:18:24,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:24,162 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 898 transitions. [2022-11-25 17:18:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 17:18:24,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:18:24,164 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:24,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:24,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-25 17:18:24,370 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:18:24,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:24,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1662320984, now seen corresponding path program 10 times [2022-11-25 17:18:24,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:18:24,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096696911] [2022-11-25 17:18:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:24,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:18:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 17:18:24,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:18:24,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096696911] [2022-11-25 17:18:24,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096696911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:24,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118791341] [2022-11-25 17:18:24,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:18:24,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:18:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:18:24,756 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:18:24,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 17:18:24,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:18:24,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:24,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 17:18:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 17:18:25,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 17:18:25,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118791341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:25,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:18:25,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2022-11-25 17:18:25,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732989078] [2022-11-25 17:18:25,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:25,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:18:25,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:18:25,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:18:25,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2022-11-25 17:18:25,118 INFO L87 Difference]: Start difference. First operand 681 states and 898 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:11,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:11,980 INFO L93 Difference]: Finished difference Result 2059 states and 2502 transitions. [2022-11-25 17:19:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 305 states. [2022-11-25 17:19:11,980 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 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 36 [2022-11-25 17:19:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:11,983 INFO L225 Difference]: With dead ends: 2059 [2022-11-25 17:19:11,983 INFO L226 Difference]: Without dead ends: 1926 [2022-11-25 17:19:11,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41456 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=5597, Invalid=92059, Unknown=0, NotChecked=0, Total=97656 [2022-11-25 17:19:11,987 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 721 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:11,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 688 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-25 17:19:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2022-11-25 17:19:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 659. [2022-11-25 17:19:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.3161094224924013) internal successors, (866), 658 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 866 transitions. [2022-11-25 17:19:12,577 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 866 transitions. Word has length 36 [2022-11-25 17:19:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:12,577 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 866 transitions. [2022-11-25 17:19:12,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 866 transitions. [2022-11-25 17:19:12,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 17:19:12,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:12,579 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:12,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:12,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:12,783 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:12,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:12,783 INFO L85 PathProgramCache]: Analyzing trace with hash -298016775, now seen corresponding path program 9 times [2022-11-25 17:19:12,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:12,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501941038] [2022-11-25 17:19:12,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:12,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:19:13,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501941038] [2022-11-25 17:19:13,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501941038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:13,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813639643] [2022-11-25 17:19:13,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:19:13,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:13,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:13,187 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:13,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 17:19:13,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:19:13,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:19:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-25 17:19:13,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-25 17:19:13,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813639643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:13,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:13,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 10] total 31 [2022-11-25 17:19:13,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583537869] [2022-11-25 17:19:13,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:13,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:19:13,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:13,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:19:13,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-11-25 17:19:13,685 INFO L87 Difference]: Start difference. First operand 659 states and 866 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:19,224 INFO L93 Difference]: Finished difference Result 1274 states and 1842 transitions. [2022-11-25 17:19:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-25 17:19:19,225 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 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 36 [2022-11-25 17:19:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:19,227 INFO L225 Difference]: With dead ends: 1274 [2022-11-25 17:19:19,227 INFO L226 Difference]: Without dead ends: 1094 [2022-11-25 17:19:19,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1182, Invalid=10590, Unknown=0, NotChecked=0, Total=11772 [2022-11-25 17:19:19,228 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 375 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2825 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 3199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:19,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1008 Invalid, 3199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2825 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 17:19:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-11-25 17:19:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 749. [2022-11-25 17:19:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.3181818181818181) internal successors, (986), 748 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 986 transitions. [2022-11-25 17:19:19,920 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 986 transitions. Word has length 36 [2022-11-25 17:19:19,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:19,921 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 986 transitions. [2022-11-25 17:19:19,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 986 transitions. [2022-11-25 17:19:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 17:19:19,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:19,922 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:19,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:20,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 17:19:20,131 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:20,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1963294526, now seen corresponding path program 11 times [2022-11-25 17:19:20,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:20,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816075350] [2022-11-25 17:19:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:20,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:20,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:20,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816075350] [2022-11-25 17:19:20,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816075350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:20,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546195627] [2022-11-25 17:19:20,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:19:20,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:20,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:20,603 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:20,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 17:19:21,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-25 17:19:21,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:21,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-25 17:19:21,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:21,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 17:19:22,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546195627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:22,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:22,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 19] total 48 [2022-11-25 17:19:22,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71078462] [2022-11-25 17:19:22,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:22,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 17:19:22,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 17:19:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1805, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 17:19:22,698 INFO L87 Difference]: Start difference. First operand 749 states and 986 transitions. Second operand has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:37,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:37,604 INFO L93 Difference]: Finished difference Result 1427 states and 2032 transitions. [2022-11-25 17:19:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-11-25 17:19:37,605 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-25 17:19:37,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:37,608 INFO L225 Difference]: With dead ends: 1427 [2022-11-25 17:19:37,608 INFO L226 Difference]: Without dead ends: 1326 [2022-11-25 17:19:37,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8347 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=5634, Invalid=19172, Unknown=0, NotChecked=0, Total=24806 [2022-11-25 17:19:37,610 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 570 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 3711 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 4198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 3711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:37,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 751 Invalid, 4198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 3711 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 17:19:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-11-25 17:19:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 813. [2022-11-25 17:19:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.3201970443349753) internal successors, (1072), 812 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1072 transitions. [2022-11-25 17:19:38,507 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1072 transitions. Word has length 37 [2022-11-25 17:19:38,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:38,507 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1072 transitions. [2022-11-25 17:19:38,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:38,511 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1072 transitions. [2022-11-25 17:19:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 17:19:38,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:38,512 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:38,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:38,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 17:19:38,723 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:19:38,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1382972419, now seen corresponding path program 7 times [2022-11-25 17:19:38,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:38,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151621189] [2022-11-25 17:19:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:38,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-25 17:19:39,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:39,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151621189] [2022-11-25 17:19:39,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151621189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:39,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533542806] [2022-11-25 17:19:39,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:19:39,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:39,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:39,149 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:39,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 17:19:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 17:19:39,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-25 17:19:39,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-25 17:19:39,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533542806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:39,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:39,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 28 [2022-11-25 17:19:39,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235508091] [2022-11-25 17:19:39,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:39,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:19:39,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:19:39,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:19:39,551 INFO L87 Difference]: Start difference. First operand 813 states and 1072 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:20:36,568 INFO L93 Difference]: Finished difference Result 2531 states and 3027 transitions. [2022-11-25 17:20:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 375 states. [2022-11-25 17:20:36,569 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 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 39 [2022-11-25 17:20:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:20:36,573 INFO L225 Difference]: With dead ends: 2531 [2022-11-25 17:20:36,573 INFO L226 Difference]: Without dead ends: 2414 [2022-11-25 17:20:36,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63538 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=6773, Invalid=139533, Unknown=0, NotChecked=0, Total=146306 [2022-11-25 17:20:36,579 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 892 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 3536 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 4191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 3536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:20:36,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 891 Invalid, 4191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 3536 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-11-25 17:20:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2022-11-25 17:20:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 765. [2022-11-25 17:20:37,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 1.3193717277486912) internal successors, (1008), 764 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1008 transitions. [2022-11-25 17:20:37,582 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1008 transitions. Word has length 39 [2022-11-25 17:20:37,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:20:37,583 INFO L495 AbstractCegarLoop]: Abstraction has 765 states and 1008 transitions. [2022-11-25 17:20:37,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1008 transitions. [2022-11-25 17:20:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 17:20:37,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:20:37,584 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:37,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-25 17:20:37,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 17:20:37,790 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:20:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:37,790 INFO L85 PathProgramCache]: Analyzing trace with hash 843702860, now seen corresponding path program 12 times [2022-11-25 17:20:37,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:37,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034203454] [2022-11-25 17:20:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:37,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-25 17:20:38,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:38,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034203454] [2022-11-25 17:20:38,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034203454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:38,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560285462] [2022-11-25 17:20:38,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:20:38,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:38,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:38,227 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:38,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 17:20:38,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-25 17:20:38,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:38,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:20:38,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-25 17:20:38,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-25 17:20:38,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560285462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:38,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:38,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2022-11-25 17:20:38,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775969345] [2022-11-25 17:20:38,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:38,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:20:38,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:38,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:20:38,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:20:38,777 INFO L87 Difference]: Start difference. First operand 765 states and 1008 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:22,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:22:22,999 INFO L93 Difference]: Finished difference Result 2769 states and 3339 transitions. [2022-11-25 17:22:23,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 414 states. [2022-11-25 17:22:23,000 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 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 39 [2022-11-25 17:22:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:22:23,005 INFO L225 Difference]: With dead ends: 2769 [2022-11-25 17:22:23,005 INFO L226 Difference]: Without dead ends: 2657 [2022-11-25 17:22:23,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78664 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=9243, Invalid=169263, Unknown=0, NotChecked=0, Total=178506 [2022-11-25 17:22:23,013 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1111 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 3102 mSolverCounterSat, 853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 3955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 853 IncrementalHoareTripleChecker+Valid, 3102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:22:23,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 827 Invalid, 3955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [853 Valid, 3102 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2022-11-25 17:22:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2022-11-25 17:22:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 804. [2022-11-25 17:22:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 1.3175591531755915) internal successors, (1058), 803 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1058 transitions. [2022-11-25 17:22:24,044 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1058 transitions. Word has length 39 [2022-11-25 17:22:24,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:22:24,044 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 1058 transitions. [2022-11-25 17:22:24,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:24,044 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1058 transitions. [2022-11-25 17:22:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 17:22:24,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:22:24,046 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:24,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:24,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 17:22:24,252 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:22:24,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:24,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1969715723, now seen corresponding path program 10 times [2022-11-25 17:22:24,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:24,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778011743] [2022-11-25 17:22:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:24,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 17:22:24,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:24,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778011743] [2022-11-25 17:22:24,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778011743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:24,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836297453] [2022-11-25 17:22:24,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:22:24,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:24,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:24,718 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:24,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 17:22:24,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:22:24,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:24,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 17:22:24,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:22:24,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-25 17:22:25,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836297453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:22:25,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:22:25,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 6] total 25 [2022-11-25 17:22:25,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320381581] [2022-11-25 17:22:25,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:22:25,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:22:25,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:25,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:22:25,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:22:25,047 INFO L87 Difference]: Start difference. First operand 804 states and 1058 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:28,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:22:28,881 INFO L93 Difference]: Finished difference Result 1486 states and 2145 transitions. [2022-11-25 17:22:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 17:22:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 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 39 [2022-11-25 17:22:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:22:28,885 INFO L225 Difference]: With dead ends: 1486 [2022-11-25 17:22:28,885 INFO L226 Difference]: Without dead ends: 1316 [2022-11-25 17:22:28,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=410, Invalid=1312, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 17:22:28,887 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 340 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:22:28,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 1235 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 17:22:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-11-25 17:22:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 869. [2022-11-25 17:22:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.314516129032258) internal successors, (1141), 868 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1141 transitions. [2022-11-25 17:22:30,054 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1141 transitions. Word has length 39 [2022-11-25 17:22:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:22:30,054 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1141 transitions. [2022-11-25 17:22:30,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1141 transitions. [2022-11-25 17:22:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 17:22:30,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:22:30,057 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:30,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:30,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:30,258 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:22:30,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1143634296, now seen corresponding path program 13 times [2022-11-25 17:22:30,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:30,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144430016] [2022-11-25 17:22:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:30,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:30,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:30,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144430016] [2022-11-25 17:22:30,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144430016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:30,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640436208] [2022-11-25 17:22:30,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:22:30,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:30,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:30,862 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:30,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 17:22:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:30,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:22:30,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-25 17:22:31,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-25 17:22:31,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640436208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:22:31,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:22:31,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2022-11-25 17:22:31,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861382806] [2022-11-25 17:22:31,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:22:31,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 17:22:31,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:31,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 17:22:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 17:22:31,403 INFO L87 Difference]: Start difference. First operand 869 states and 1141 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:27:47,191 INFO L93 Difference]: Finished difference Result 3593 states and 4375 transitions. [2022-11-25 17:27:47,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 696 states. [2022-11-25 17:27:47,191 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 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 40 [2022-11-25 17:27:47,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:27:47,204 INFO L225 Difference]: With dead ends: 3593 [2022-11-25 17:27:47,204 INFO L226 Difference]: Without dead ends: 3470 [2022-11-25 17:27:47,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 713 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235354 ImplicationChecksByTransitivity, 264.4s TimeCoverageRelationStatistics Valid=18043, Invalid=492467, Unknown=0, NotChecked=0, Total=510510 [2022-11-25 17:27:47,233 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 2000 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 9336 mSolverCounterSat, 1731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2000 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 11067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1731 IncrementalHoareTripleChecker+Valid, 9336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:27:47,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2000 Valid, 1188 Invalid, 11067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1731 Valid, 9336 Invalid, 0 Unknown, 0 Unchecked, 32.9s Time] [2022-11-25 17:27:47,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2022-11-25 17:27:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 923. [2022-11-25 17:27:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.322125813449024) internal successors, (1219), 922 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1219 transitions. [2022-11-25 17:27:48,810 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1219 transitions. Word has length 40 [2022-11-25 17:27:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:27:48,810 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1219 transitions. [2022-11-25 17:27:48,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1219 transitions. [2022-11-25 17:27:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 17:27:48,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:27:48,813 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:27:48,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-25 17:27:49,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-25 17:27:49,013 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:27:49,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:27:49,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1907019278, now seen corresponding path program 11 times [2022-11-25 17:27:49,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:27:49,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416505216] [2022-11-25 17:27:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:27:49,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:27:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:27:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 17:27:49,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:27:49,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416505216] [2022-11-25 17:27:49,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416505216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:27:49,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284198064] [2022-11-25 17:27:49,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:27:49,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:49,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:27:49,500 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:27:49,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 17:27:51,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-25 17:27:51,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:27:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 17:27:51,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:27:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:27:52,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:27:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-25 17:27:52,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284198064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:27:52,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:27:52,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 6] total 26 [2022-11-25 17:27:52,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717240351] [2022-11-25 17:27:52,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:27:52,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:27:52,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:27:52,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:27:52,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:27:52,236 INFO L87 Difference]: Start difference. First operand 923 states and 1219 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:27:56,525 INFO L93 Difference]: Finished difference Result 1636 states and 2356 transitions. [2022-11-25 17:27:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 17:27:56,526 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 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 41 [2022-11-25 17:27:56,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:27:56,531 INFO L225 Difference]: With dead ends: 1636 [2022-11-25 17:27:56,531 INFO L226 Difference]: Without dead ends: 1463 [2022-11-25 17:27:56,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=447, Invalid=1445, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 17:27:56,533 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 365 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:27:56,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 1244 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 17:27:56,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-11-25 17:27:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 879. [2022-11-25 17:27:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.3405466970387243) internal successors, (1177), 878 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1177 transitions. [2022-11-25 17:27:58,073 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1177 transitions. Word has length 41 [2022-11-25 17:27:58,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:27:58,073 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1177 transitions. [2022-11-25 17:27:58,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1177 transitions. [2022-11-25 17:27:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 17:27:58,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:27:58,074 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:27:58,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-25 17:27:58,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:58,275 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:27:58,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:27:58,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2041166362, now seen corresponding path program 12 times [2022-11-25 17:27:58,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:27:58,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762418330] [2022-11-25 17:27:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:27:58,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:27:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:27:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 17:27:58,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:27:58,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762418330] [2022-11-25 17:27:58,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762418330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:27:58,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243853490] [2022-11-25 17:27:58,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:27:58,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:58,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:27:58,807 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:27:58,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-25 17:27:58,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 17:27:58,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:27:58,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-25 17:27:58,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:27:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 17:27:59,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:27:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 17:27:59,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243853490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:27:59,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:27:59,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-11-25 17:27:59,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174260287] [2022-11-25 17:27:59,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:27:59,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:27:59,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:27:59,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:27:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:27:59,063 INFO L87 Difference]: Start difference. First operand 879 states and 1177 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:28:04,142 INFO L93 Difference]: Finished difference Result 1619 states and 2078 transitions. [2022-11-25 17:28:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:28:04,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-25 17:28:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:28:04,146 INFO L225 Difference]: With dead ends: 1619 [2022-11-25 17:28:04,146 INFO L226 Difference]: Without dead ends: 1391 [2022-11-25 17:28:04,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:28:04,147 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:28:04,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 285 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:28:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2022-11-25 17:28:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 847. [2022-11-25 17:28:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.3486997635933806) internal successors, (1141), 846 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1141 transitions. [2022-11-25 17:28:05,706 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1141 transitions. Word has length 42 [2022-11-25 17:28:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:28:05,706 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1141 transitions. [2022-11-25 17:28:05,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:05,706 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1141 transitions. [2022-11-25 17:28:05,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 17:28:05,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:28:05,708 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:05,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-25 17:28:05,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:28:05,908 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:28:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:05,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1591776935, now seen corresponding path program 13 times [2022-11-25 17:28:05,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:05,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208886602] [2022-11-25 17:28:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:05,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-25 17:28:06,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:06,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208886602] [2022-11-25 17:28:06,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208886602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:28:06,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746069302] [2022-11-25 17:28:06,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:28:06,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:28:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:28:06,317 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:28:06,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-25 17:28:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:06,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 17:28:06,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:28:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-25 17:28:06,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:28:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-25 17:28:06,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746069302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:28:06,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:28:06,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2022-11-25 17:28:06,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600564786] [2022-11-25 17:28:06,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:28:06,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:28:06,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:06,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:28:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:28:06,629 INFO L87 Difference]: Start difference. First operand 847 states and 1141 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:21,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:28:21,167 INFO L93 Difference]: Finished difference Result 2338 states and 2907 transitions. [2022-11-25 17:28:21,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 17:28:21,168 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 42 [2022-11-25 17:28:21,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:28:21,172 INFO L225 Difference]: With dead ends: 2338 [2022-11-25 17:28:21,172 INFO L226 Difference]: Without dead ends: 2228 [2022-11-25 17:28:21,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=454, Invalid=1708, Unknown=0, NotChecked=0, Total=2162 [2022-11-25 17:28:21,173 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 531 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:28:21,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 239 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 17:28:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2022-11-25 17:28:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 928. [2022-11-25 17:28:22,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.3419633225458467) internal successors, (1244), 927 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1244 transitions. [2022-11-25 17:28:22,817 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1244 transitions. Word has length 42 [2022-11-25 17:28:22,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:28:22,817 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1244 transitions. [2022-11-25 17:28:22,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:22,817 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1244 transitions. [2022-11-25 17:28:22,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 17:28:22,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:28:22,820 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:22,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-25 17:28:23,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-25 17:28:23,025 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:28:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:23,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2003608313, now seen corresponding path program 8 times [2022-11-25 17:28:23,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:23,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784427182] [2022-11-25 17:28:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:23,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 17:28:23,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:23,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784427182] [2022-11-25 17:28:23,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784427182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:28:23,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269945775] [2022-11-25 17:28:23,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:28:23,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:28:23,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:28:23,547 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:28:23,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-25 17:28:23,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:28:23,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:28:23,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:28:23,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:28:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-25 17:28:23,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:28:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-25 17:28:24,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269945775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:28:24,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:28:24,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 31 [2022-11-25 17:28:24,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175054352] [2022-11-25 17:28:24,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:28:24,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:28:24,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:24,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:28:24,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2022-11-25 17:28:24,043 INFO L87 Difference]: Start difference. First operand 928 states and 1244 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:24,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:30:24,058 INFO L93 Difference]: Finished difference Result 3276 states and 3902 transitions. [2022-11-25 17:30:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 496 states. [2022-11-25 17:30:24,058 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-25 17:30:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:30:24,062 INFO L225 Difference]: With dead ends: 3276 [2022-11-25 17:30:24,062 INFO L226 Difference]: Without dead ends: 3121 [2022-11-25 17:30:24,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 503 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113191 ImplicationChecksByTransitivity, 83.9s TimeCoverageRelationStatistics Valid=10827, Invalid=243693, Unknown=0, NotChecked=0, Total=254520 [2022-11-25 17:30:24,071 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1106 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 5190 mSolverCounterSat, 665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 5855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 665 IncrementalHoareTripleChecker+Valid, 5190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:30:24,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1106 Valid, 1180 Invalid, 5855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [665 Valid, 5190 Invalid, 0 Unknown, 0 Unchecked, 14.8s Time] [2022-11-25 17:30:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2022-11-25 17:30:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 892. [2022-11-25 17:30:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 1.3389450056116723) internal successors, (1193), 891 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1193 transitions. [2022-11-25 17:30:25,680 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1193 transitions. Word has length 42 [2022-11-25 17:30:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:30:25,680 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 1193 transitions. [2022-11-25 17:30:25,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1193 transitions. [2022-11-25 17:30:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 17:30:25,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:30:25,682 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:25,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:25,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-25 17:30:25,887 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:30:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:25,887 INFO L85 PathProgramCache]: Analyzing trace with hash -844328665, now seen corresponding path program 5 times [2022-11-25 17:30:25,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:25,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527134629] [2022-11-25 17:30:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:25,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 17:30:26,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:26,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527134629] [2022-11-25 17:30:26,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527134629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:26,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868089310] [2022-11-25 17:30:26,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:30:26,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:26,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:26,406 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:26,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-25 17:30:30,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-25 17:30:30,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:30:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-25 17:30:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:30:30,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-25 17:30:31,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868089310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:31,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:31,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 13] total 43 [2022-11-25 17:30:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472743246] [2022-11-25 17:30:31,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:31,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 17:30:31,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 17:30:31,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1498, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 17:30:31,202 INFO L87 Difference]: Start difference. First operand 892 states and 1193 transitions. Second operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:30:39,664 INFO L93 Difference]: Finished difference Result 1647 states and 2359 transitions. [2022-11-25 17:30:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-25 17:30:39,664 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 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 42 [2022-11-25 17:30:39,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:30:39,667 INFO L225 Difference]: With dead ends: 1647 [2022-11-25 17:30:39,667 INFO L226 Difference]: Without dead ends: 1407 [2022-11-25 17:30:39,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1703, Invalid=10069, Unknown=0, NotChecked=0, Total=11772 [2022-11-25 17:30:39,668 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 456 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 3260 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 3691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 3260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:30:39,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1531 Invalid, 3691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 3260 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 17:30:39,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2022-11-25 17:30:41,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1003. [2022-11-25 17:30:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.3193612774451098) internal successors, (1322), 1002 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1322 transitions. [2022-11-25 17:30:41,396 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1322 transitions. Word has length 42 [2022-11-25 17:30:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:30:41,396 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1322 transitions. [2022-11-25 17:30:41,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1322 transitions. [2022-11-25 17:30:41,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 17:30:41,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:30:41,398 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:41,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:41,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-25 17:30:41,599 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:30:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:41,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1263287635, now seen corresponding path program 9 times [2022-11-25 17:30:41,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:41,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576689902] [2022-11-25 17:30:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:41,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 17:30:42,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:42,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576689902] [2022-11-25 17:30:42,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576689902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:42,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093444780] [2022-11-25 17:30:42,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:30:42,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:42,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:42,119 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:42,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5316f85-9258-412f-a8d3-bb0c8a2ee370/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-25 17:30:42,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 17:30:42,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:30:42,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-25 17:30:42,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 17:30:42,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 1 proven. 101 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:30:43,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093444780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:43,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:43,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2022-11-25 17:30:43,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477654407] [2022-11-25 17:30:43,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:43,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-25 17:30:43,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:44,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-25 17:30:44,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=2515, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 17:30:44,000 INFO L87 Difference]: Start difference. First operand 1003 states and 1322 transitions. Second operand has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)