./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label46.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label46.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a68bea7fd32ae89c685bcf877550bbd817c11891e4cf8a49181c142fa0679e6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 11:01:10,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:01:10,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:01:10,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:01:10,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:01:10,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:01:10,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:01:10,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:01:10,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:01:10,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:01:10,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:01:10,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:01:10,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:01:10,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:01:10,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:01:10,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:01:10,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:01:10,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:01:10,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:01:10,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:01:10,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:01:10,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:01:10,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:01:10,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:01:10,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:01:10,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:01:10,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:01:10,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:01:10,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:01:10,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:01:10,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:01:10,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:01:10,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:01:10,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:01:10,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:01:10,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:01:10,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:01:10,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:01:10,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:01:10,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:01:10,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:01:10,504 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:01:10,528 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:01:10,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:01:10,529 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:01:10,529 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:01:10,530 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:01:10,530 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:01:10,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:01:10,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:01:10,531 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:01:10,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:01:10,532 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:01:10,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:01:10,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:01:10,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:01:10,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:01:10,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:01:10,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:01:10,533 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:01:10,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:01:10,534 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:01:10,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:01:10,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:01:10,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:01:10,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:01:10,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:01:10,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:01:10,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:01:10,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:01:10,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:01:10,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:01:10,536 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:01:10,536 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:01:10,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:01:10,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a68bea7fd32ae89c685bcf877550bbd817c11891e4cf8a49181c142fa0679e6 [2022-10-17 11:01:10,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:01:10,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:01:10,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:01:10,869 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:01:10,870 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:01:10,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem18_label46.c [2022-10-17 11:01:10,939 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/data/ea00efae5/2c7d19cadbfa45c2a9458c4622234ef7/FLAG99b8e45ba [2022-10-17 11:01:11,825 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:01:11,827 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/sv-benchmarks/c/eca-rers2012/Problem18_label46.c [2022-10-17 11:01:11,860 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/data/ea00efae5/2c7d19cadbfa45c2a9458c4622234ef7/FLAG99b8e45ba [2022-10-17 11:01:11,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/data/ea00efae5/2c7d19cadbfa45c2a9458c4622234ef7 [2022-10-17 11:01:11,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:01:11,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:01:11,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:01:11,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:01:11,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:01:11,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:01:11" (1/1) ... [2022-10-17 11:01:11,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13795d6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:11, skipping insertion in model container [2022-10-17 11:01:11,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:01:11" (1/1) ... [2022-10-17 11:01:11,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:01:12,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:01:12,277 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/sv-benchmarks/c/eca-rers2012/Problem18_label46.c[3974,3987] [2022-10-17 11:01:13,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:01:13,125 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:01:13,155 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/sv-benchmarks/c/eca-rers2012/Problem18_label46.c[3974,3987] [2022-10-17 11:01:13,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:01:13,649 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:01:13,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13 WrapperNode [2022-10-17 11:01:13,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:01:13,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:01:13,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:01:13,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:01:13,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13" (1/1) ... [2022-10-17 11:01:13,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13" (1/1) ... [2022-10-17 11:01:13,946 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2022-10-17 11:01:13,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:01:13,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:01:13,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:01:13,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:01:13,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13" (1/1) ... [2022-10-17 11:01:13,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13" (1/1) ... [2022-10-17 11:01:13,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13" (1/1) ... [2022-10-17 11:01:13,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13" (1/1) ... [2022-10-17 11:01:14,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13" (1/1) ... [2022-10-17 11:01:14,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13" (1/1) ... [2022-10-17 11:01:14,225 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13" (1/1) ... [2022-10-17 11:01:14,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13" (1/1) ... [2022-10-17 11:01:14,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:01:14,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:01:14,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:01:14,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:01:14,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13" (1/1) ... [2022-10-17 11:01:14,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:01:14,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:01:14,310 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:01:14,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:01:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:01:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:01:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:01:14,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:01:14,441 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:01:14,443 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:01:18,719 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:01:18,745 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:01:18,745 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 11:01:18,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:01:18 BoogieIcfgContainer [2022-10-17 11:01:18,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:01:18,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:01:18,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:01:18,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:01:18,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:01:11" (1/3) ... [2022-10-17 11:01:18,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6635b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:01:18, skipping insertion in model container [2022-10-17 11:01:18,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:13" (2/3) ... [2022-10-17 11:01:18,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6635b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:01:18, skipping insertion in model container [2022-10-17 11:01:18,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:01:18" (3/3) ... [2022-10-17 11:01:18,765 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label46.c [2022-10-17 11:01:18,784 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:01:18,784 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:01:18,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:01:18,869 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;@11cc40f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:01:18,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 11:01:18,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-17 11:01:18,897 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:18,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:18,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:18,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:18,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1318097310, now seen corresponding path program 1 times [2022-10-17 11:01:18,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744941311] [2022-10-17 11:01:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:18,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:19,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:19,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744941311] [2022-10-17 11:01:19,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744941311] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:19,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:19,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:01:19,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778256109] [2022-10-17 11:01:19,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:19,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:19,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:19,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:19,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:19,310 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 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) [2022-10-17 11:01:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:23,035 INFO L93 Difference]: Finished difference Result 2205 states and 4266 transitions. [2022-10-17 11:01:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:23,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 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 36 [2022-10-17 11:01:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:23,063 INFO L225 Difference]: With dead ends: 2205 [2022-10-17 11:01:23,064 INFO L226 Difference]: Without dead ends: 1384 [2022-10-17 11:01:23,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:23,074 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 712 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 967 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 967 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:23,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 291 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [967 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-10-17 11:01:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-10-17 11:01:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2022-10-17 11:01:23,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.7339117859725235) internal successors, (2398), 1383 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2398 transitions. [2022-10-17 11:01:23,193 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2398 transitions. Word has length 36 [2022-10-17 11:01:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:23,193 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 2398 transitions. [2022-10-17 11:01:23,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 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) [2022-10-17 11:01:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2398 transitions. [2022-10-17 11:01:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-10-17 11:01:23,198 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:23,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:23,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:01:23,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1625775048, now seen corresponding path program 1 times [2022-10-17 11:01:23,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:23,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140298426] [2022-10-17 11:01:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:23,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:23,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:23,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140298426] [2022-10-17 11:01:23,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140298426] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:23,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:23,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:01:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900531952] [2022-10-17 11:01:23,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:23,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:01:23,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:23,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:01:23,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:01:23,523 INFO L87 Difference]: Start difference. First operand 1384 states and 2398 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:28,496 INFO L93 Difference]: Finished difference Result 4842 states and 8275 transitions. [2022-10-17 11:01:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:01:28,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-10-17 11:01:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:28,518 INFO L225 Difference]: With dead ends: 4842 [2022-10-17 11:01:28,519 INFO L226 Difference]: Without dead ends: 3460 [2022-10-17 11:01:28,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:01:28,529 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 2035 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 1421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2035 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 4689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1421 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:28,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2035 Valid, 135 Invalid, 4689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1421 Valid, 3268 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-10-17 11:01:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2022-10-17 11:01:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3454. [2022-10-17 11:01:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.5409788589632203) internal successors, (5321), 3453 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5321 transitions. [2022-10-17 11:01:28,640 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5321 transitions. Word has length 105 [2022-10-17 11:01:28,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:28,641 INFO L495 AbstractCegarLoop]: Abstraction has 3454 states and 5321 transitions. [2022-10-17 11:01:28,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:28,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5321 transitions. [2022-10-17 11:01:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-10-17 11:01:28,656 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:28,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:28,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 11:01:28,659 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash 754214505, now seen corresponding path program 1 times [2022-10-17 11:01:28,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:28,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465962625] [2022-10-17 11:01:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:28,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:29,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:29,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465962625] [2022-10-17 11:01:29,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465962625] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:29,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:29,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:01:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497311862] [2022-10-17 11:01:29,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:29,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:01:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:01:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:01:29,391 INFO L87 Difference]: Start difference. First operand 3454 states and 5321 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:34,079 INFO L93 Difference]: Finished difference Result 11046 states and 17165 transitions. [2022-10-17 11:01:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 11:01:34,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2022-10-17 11:01:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:34,125 INFO L225 Difference]: With dead ends: 11046 [2022-10-17 11:01:34,125 INFO L226 Difference]: Without dead ends: 7594 [2022-10-17 11:01:34,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:01:34,132 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 1872 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4378 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1872 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 5007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 4378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:34,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1872 Valid, 647 Invalid, 5007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 4378 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-10-17 11:01:34,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2022-10-17 11:01:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 6904. [2022-10-17 11:01:34,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 1.3271041576126321) internal successors, (9161), 6903 states have internal predecessors, (9161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 9161 transitions. [2022-10-17 11:01:34,378 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 9161 transitions. Word has length 154 [2022-10-17 11:01:34,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:34,379 INFO L495 AbstractCegarLoop]: Abstraction has 6904 states and 9161 transitions. [2022-10-17 11:01:34,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 9161 transitions. [2022-10-17 11:01:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-10-17 11:01:34,384 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:34,385 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:34,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 11:01:34,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:34,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1435001773, now seen corresponding path program 1 times [2022-10-17 11:01:34,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:34,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962784250] [2022-10-17 11:01:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:34,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:34,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:34,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962784250] [2022-10-17 11:01:34,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962784250] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:34,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:34,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:01:34,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547145508] [2022-10-17 11:01:34,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:34,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:01:34,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:34,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:01:34,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:01:34,938 INFO L87 Difference]: Start difference. First operand 6904 states and 9161 transitions. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:38,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:38,074 INFO L93 Difference]: Finished difference Result 16619 states and 22100 transitions. [2022-10-17 11:01:38,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 11:01:38,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 295 [2022-10-17 11:01:38,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:38,123 INFO L225 Difference]: With dead ends: 16619 [2022-10-17 11:01:38,123 INFO L226 Difference]: Without dead ends: 9664 [2022-10-17 11:01:38,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:01:38,133 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 515 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3037 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 3726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 3037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:38,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 637 Invalid, 3726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 3037 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-10-17 11:01:38,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2022-10-17 11:01:38,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 8974. [2022-10-17 11:01:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8974 states, 8973 states have (on average 1.1909060514877967) internal successors, (10686), 8973 states have internal predecessors, (10686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10686 transitions. [2022-10-17 11:01:38,363 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10686 transitions. Word has length 295 [2022-10-17 11:01:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:38,365 INFO L495 AbstractCegarLoop]: Abstraction has 8974 states and 10686 transitions. [2022-10-17 11:01:38,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10686 transitions. [2022-10-17 11:01:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2022-10-17 11:01:38,391 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:38,392 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:38,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 11:01:38,392 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:38,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:38,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2024109914, now seen corresponding path program 1 times [2022-10-17 11:01:38,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:38,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939472842] [2022-10-17 11:01:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:38,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-10-17 11:01:40,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:40,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939472842] [2022-10-17 11:01:40,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939472842] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:01:40,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137648044] [2022-10-17 11:01:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:40,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:01:40,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:01:40,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:01:40,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3541cf43-a428-42d2-9cf6-8a01fa071e8d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 11:01:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:40,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 11:01:40,441 INFO L286 TraceCheckSpWp]: Computing forward predicates...