./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa --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 f29cc89d3ee64e709bcde3f8f1e5c1c29a2d05992b7eca470a9d177af894449a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:17:47,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:17:47,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:17:47,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:17:47,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:17:47,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:17:47,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:17:47,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:17:47,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:17:47,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:17:47,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:17:47,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:17:47,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:17:47,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:17:47,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:17:47,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:17:47,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:17:47,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:17:47,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:17:47,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:17:47,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:17:47,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:17:47,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:17:47,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:17:47,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:17:47,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:17:47,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:17:47,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:17:47,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:17:47,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:17:47,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:17:47,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:17:47,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:17:47,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:17:47,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:17:47,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:17:47,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:17:47,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:17:47,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:17:47,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:17:47,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:17:47,532 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:17:47,550 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:17:47,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:17:47,551 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:17:47,551 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:17:47,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:17:47,552 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:17:47,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:17:47,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:17:47,552 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:17:47,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:17:47,553 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:17:47,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:17:47,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:17:47,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:17:47,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:17:47,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:17:47,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:17:47,554 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:17:47,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:17:47,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:17:47,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:17:47,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:17:47,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:17:47,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:17:47,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:17:47,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:17:47,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:17:47,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:17:47,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:17:47,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:17:47,556 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:17:47,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:17:47,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:17:47,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:17:47,556 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_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f29cc89d3ee64e709bcde3f8f1e5c1c29a2d05992b7eca470a9d177af894449a [2021-12-06 18:17:47,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:17:47,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:17:47,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:17:47,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:17:47,765 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:17:47,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/product-lines/email_spec7_product28.cil.c [2021-12-06 18:17:47,815 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/data/ee9dc0ff0/3ad79f38deb94116a2e237a34a28ae81/FLAGceff37277 [2021-12-06 18:17:48,243 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:17:48,243 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/sv-benchmarks/c/product-lines/email_spec7_product28.cil.c [2021-12-06 18:17:48,258 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/data/ee9dc0ff0/3ad79f38deb94116a2e237a34a28ae81/FLAGceff37277 [2021-12-06 18:17:48,267 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/data/ee9dc0ff0/3ad79f38deb94116a2e237a34a28ae81 [2021-12-06 18:17:48,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:17:48,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:17:48,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:17:48,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:17:48,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:17:48,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:17:48" (1/1) ... [2021-12-06 18:17:48,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26bb07e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48, skipping insertion in model container [2021-12-06 18:17:48,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:17:48" (1/1) ... [2021-12-06 18:17:48,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:17:48,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:17:48,471 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_c867e6c2-afa9-4123-842a-8e519dbc443a/sv-benchmarks/c/product-lines/email_spec7_product28.cil.c[1542,1555] [2021-12-06 18:17:48,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:17:48,736 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:17:48,745 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_c867e6c2-afa9-4123-842a-8e519dbc443a/sv-benchmarks/c/product-lines/email_spec7_product28.cil.c[1542,1555] [2021-12-06 18:17:48,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:17:48,836 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:17:48,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48 WrapperNode [2021-12-06 18:17:48,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:17:48,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:17:48,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:17:48,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:17:48,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48" (1/1) ... [2021-12-06 18:17:48,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48" (1/1) ... [2021-12-06 18:17:48,900 INFO L137 Inliner]: procedures = 128, calls = 205, calls flagged for inlining = 55, calls inlined = 45, statements flattened = 839 [2021-12-06 18:17:48,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:17:48,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:17:48,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:17:48,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:17:48,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48" (1/1) ... [2021-12-06 18:17:48,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48" (1/1) ... [2021-12-06 18:17:48,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48" (1/1) ... [2021-12-06 18:17:48,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48" (1/1) ... [2021-12-06 18:17:48,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48" (1/1) ... [2021-12-06 18:17:48,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48" (1/1) ... [2021-12-06 18:17:48,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48" (1/1) ... [2021-12-06 18:17:48,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:17:48,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:17:48,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:17:48,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:17:48,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48" (1/1) ... [2021-12-06 18:17:48,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:17:48,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:17:48,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:17:48,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:17:49,014 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-12-06 18:17:49,015 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-12-06 18:17:49,015 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-12-06 18:17:49,015 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-12-06 18:17:49,015 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-12-06 18:17:49,015 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-12-06 18:17:49,015 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-12-06 18:17:49,015 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-12-06 18:17:49,015 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-12-06 18:17:49,015 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-12-06 18:17:49,015 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-12-06 18:17:49,015 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-12-06 18:17:49,016 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-12-06 18:17:49,016 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-12-06 18:17:49,016 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-12-06 18:17:49,016 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-12-06 18:17:49,016 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-12-06 18:17:49,016 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-12-06 18:17:49,016 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-12-06 18:17:49,016 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-12-06 18:17:49,017 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-12-06 18:17:49,018 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-12-06 18:17:49,018 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-12-06 18:17:49,018 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-12-06 18:17:49,018 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-12-06 18:17:49,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:17:49,018 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-12-06 18:17:49,018 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-12-06 18:17:49,018 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-12-06 18:17:49,019 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-12-06 18:17:49,019 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-12-06 18:17:49,019 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-12-06 18:17:49,019 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-12-06 18:17:49,019 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-12-06 18:17:49,019 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-12-06 18:17:49,019 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-12-06 18:17:49,019 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-12-06 18:17:49,019 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-12-06 18:17:49,019 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-12-06 18:17:49,019 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-12-06 18:17:49,019 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-12-06 18:17:49,020 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-12-06 18:17:49,020 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-12-06 18:17:49,020 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-12-06 18:17:49,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:17:49,020 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-12-06 18:17:49,020 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-12-06 18:17:49,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:17:49,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:17:49,162 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:17:49,164 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:17:49,621 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:17:49,631 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:17:49,632 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 18:17:49,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:17:49 BoogieIcfgContainer [2021-12-06 18:17:49,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:17:49,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:17:49,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:17:49,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:17:49,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:17:48" (1/3) ... [2021-12-06 18:17:49,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4266f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:17:49, skipping insertion in model container [2021-12-06 18:17:49,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:17:48" (2/3) ... [2021-12-06 18:17:49,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4266f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:17:49, skipping insertion in model container [2021-12-06 18:17:49,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:17:49" (3/3) ... [2021-12-06 18:17:49,641 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_product28.cil.c [2021-12-06 18:17:49,645 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:17:49,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:17:49,686 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:17:49,693 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:17:49,693 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:17:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand has 324 states, 251 states have (on average 1.5219123505976095) internal successors, (382), 255 states have internal predecessors, (382), 49 states have call successors, (49), 22 states have call predecessors, (49), 22 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-12-06 18:17:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 18:17:49,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:17:49,740 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:17:49,740 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:17:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:49,746 INFO L85 PathProgramCache]: Analyzing trace with hash 331182671, now seen corresponding path program 1 times [2021-12-06 18:17:49,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:17:49,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652950972] [2021-12-06 18:17:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:49,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:17:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:17:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:17:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:17:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:17:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:17:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:17:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 18:17:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:17:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:17:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:17:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 18:17:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 18:17:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:17:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 18:17:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:17:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:17:50,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:17:50,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652950972] [2021-12-06 18:17:50,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652950972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:17:50,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300215759] [2021-12-06 18:17:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:50,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:17:50,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:17:50,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:17:50,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:17:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 18:17:50,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:17:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 18:17:50,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:17:50,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300215759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:17:50,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:17:50,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 8 [2021-12-06 18:17:50,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197283022] [2021-12-06 18:17:50,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:17:50,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:17:50,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:50,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:17:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:17:50,516 INFO L87 Difference]: Start difference. First operand has 324 states, 251 states have (on average 1.5219123505976095) internal successors, (382), 255 states have internal predecessors, (382), 49 states have call successors, (49), 22 states have call predecessors, (49), 22 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Second operand has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:17:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:17:50,557 INFO L93 Difference]: Finished difference Result 499 states and 722 transitions. [2021-12-06 18:17:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:17:50,559 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 117 [2021-12-06 18:17:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:17:50,570 INFO L225 Difference]: With dead ends: 499 [2021-12-06 18:17:50,570 INFO L226 Difference]: Without dead ends: 317 [2021-12-06 18:17:50,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:17:50,576 INFO L933 BasicCegarLoop]: 476 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, 476 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 [2021-12-06 18:17:50,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:17:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-06 18:17:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2021-12-06 18:17:50,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 245 states have (on average 1.5142857142857142) internal successors, (371), 248 states have internal predecessors, (371), 49 states have call successors, (49), 22 states have call predecessors, (49), 22 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-12-06 18:17:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 468 transitions. [2021-12-06 18:17:50,628 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 468 transitions. Word has length 117 [2021-12-06 18:17:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:17:50,629 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 468 transitions. [2021-12-06 18:17:50,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:17:50,630 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 468 transitions. [2021-12-06 18:17:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 18:17:50,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:17:50,637 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:17:50,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:17:50,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-06 18:17:50,838 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:17:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:50,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1049878184, now seen corresponding path program 1 times [2021-12-06 18:17:50,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:17:50,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918688364] [2021-12-06 18:17:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:50,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:17:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:17:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:17:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:17:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:17:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:17:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:17:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:17:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:17:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:17:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:17:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:17:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 18:17:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:17:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 18:17:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:50,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:17:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:17:51,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:17:51,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918688364] [2021-12-06 18:17:51,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918688364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:17:51,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416703663] [2021-12-06 18:17:51,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:51,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:17:51,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:17:51,006 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:17:51,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:17:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 18:17:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:17:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 18:17:51,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:17:51,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416703663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:17:51,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:17:51,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-06 18:17:51,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781123164] [2021-12-06 18:17:51,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:17:51,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:17:51,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:51,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:17:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:17:51,298 INFO L87 Difference]: Start difference. First operand 317 states and 468 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:17:51,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:17:51,335 INFO L93 Difference]: Finished difference Result 489 states and 703 transitions. [2021-12-06 18:17:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:17:51,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 118 [2021-12-06 18:17:51,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:17:51,339 INFO L225 Difference]: With dead ends: 489 [2021-12-06 18:17:51,339 INFO L226 Difference]: Without dead ends: 320 [2021-12-06 18:17:51,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:17:51,341 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 1 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:17:51,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 930 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:17:51,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-06 18:17:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2021-12-06 18:17:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 247 states have (on average 1.5101214574898785) internal successors, (373), 250 states have internal predecessors, (373), 49 states have call successors, (49), 22 states have call predecessors, (49), 22 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-12-06 18:17:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 470 transitions. [2021-12-06 18:17:51,361 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 470 transitions. Word has length 118 [2021-12-06 18:17:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:17:51,362 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 470 transitions. [2021-12-06 18:17:51,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:17:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 470 transitions. [2021-12-06 18:17:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 18:17:51,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:17:51,370 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:17:51,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:17:51,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:17:51,573 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:17:51,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:51,575 INFO L85 PathProgramCache]: Analyzing trace with hash -584714191, now seen corresponding path program 1 times [2021-12-06 18:17:51,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:17:51,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980015554] [2021-12-06 18:17:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:51,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:17:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:17:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:17:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:17:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:17:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:17:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:17:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 18:17:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:17:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:17:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:17:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 18:17:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:17:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:17:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 18:17:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:17:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 18:17:51,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:17:51,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980015554] [2021-12-06 18:17:51,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980015554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:17:51,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714440554] [2021-12-06 18:17:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:51,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:17:51,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:17:51,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:17:51,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:17:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:17:51,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:17:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 18:17:52,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:17:52,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714440554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:17:52,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:17:52,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-06 18:17:52,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043554352] [2021-12-06 18:17:52,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:17:52,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:17:52,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:52,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:17:52,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:17:52,043 INFO L87 Difference]: Start difference. First operand 319 states and 470 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:17:52,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:17:52,072 INFO L93 Difference]: Finished difference Result 663 states and 991 transitions. [2021-12-06 18:17:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:17:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 124 [2021-12-06 18:17:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:17:52,075 INFO L225 Difference]: With dead ends: 663 [2021-12-06 18:17:52,075 INFO L226 Difference]: Without dead ends: 371 [2021-12-06 18:17:52,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:17:52,077 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 99 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:17:52,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 912 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:17:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-06 18:17:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 363. [2021-12-06 18:17:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 280 states have (on average 1.525) internal successors, (427), 283 states have internal predecessors, (427), 60 states have call successors, (60), 22 states have call predecessors, (60), 22 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-06 18:17:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 546 transitions. [2021-12-06 18:17:52,106 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 546 transitions. Word has length 124 [2021-12-06 18:17:52,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:17:52,107 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 546 transitions. [2021-12-06 18:17:52,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:17:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 546 transitions. [2021-12-06 18:17:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 18:17:52,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:17:52,110 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:17:52,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:17:52,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:17:52,313 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:17:52,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:52,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1843508188, now seen corresponding path program 1 times [2021-12-06 18:17:52,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:17:52,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257416882] [2021-12-06 18:17:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:52,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:17:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:17:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:17:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:17:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 18:17:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 18:17:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:17:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 18:17:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:17:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:17:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 18:17:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:17:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 18:17:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 18:17:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 18:17:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:17:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 18:17:52,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:17:52,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257416882] [2021-12-06 18:17:52,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257416882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:17:52,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63685527] [2021-12-06 18:17:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:52,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:17:52,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:17:52,573 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:17:52,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:17:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:52,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:17:52,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:17:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:17:52,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:17:52,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63685527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:17:52,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:17:52,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-06 18:17:52,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350582419] [2021-12-06 18:17:52,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:17:52,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:17:52,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:52,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:17:52,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:17:52,892 INFO L87 Difference]: Start difference. First operand 363 states and 546 transitions. Second operand has 5 states, 4 states have (on average 20.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:17:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:17:52,956 INFO L93 Difference]: Finished difference Result 717 states and 1082 transitions. [2021-12-06 18:17:52,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:17:52,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2021-12-06 18:17:52,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:17:52,960 INFO L225 Difference]: With dead ends: 717 [2021-12-06 18:17:52,960 INFO L226 Difference]: Without dead ends: 365 [2021-12-06 18:17:52,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:17:52,963 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 117 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:17:52,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1700 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:17:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-06 18:17:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2021-12-06 18:17:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 281 states have (on average 1.5231316725978647) internal successors, (428), 285 states have internal predecessors, (428), 60 states have call successors, (60), 22 states have call predecessors, (60), 23 states have return successors, (61), 59 states have call predecessors, (61), 59 states have call successors, (61) [2021-12-06 18:17:52,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 549 transitions. [2021-12-06 18:17:52,987 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 549 transitions. Word has length 125 [2021-12-06 18:17:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:17:52,987 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 549 transitions. [2021-12-06 18:17:52,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 20.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:17:52,988 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 549 transitions. [2021-12-06 18:17:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-06 18:17:52,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:17:52,991 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:17:53,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:17:53,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:17:53,193 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:17:53,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:53,194 INFO L85 PathProgramCache]: Analyzing trace with hash 490493493, now seen corresponding path program 1 times [2021-12-06 18:17:53,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:17:53,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976361727] [2021-12-06 18:17:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:53,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:17:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:17:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:17:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:17:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:17:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 18:17:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:17:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 18:17:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:17:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:17:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:17:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 18:17:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 18:17:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 18:17:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 18:17:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:17:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 18:17:53,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:17:53,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976361727] [2021-12-06 18:17:53,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976361727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:17:53,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141833376] [2021-12-06 18:17:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:53,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:17:53,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:17:53,421 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:17:53,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:17:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:53,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:17:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:17:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:17:53,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:17:53,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141833376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:17:53,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:17:53,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-12-06 18:17:53,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580935784] [2021-12-06 18:17:53,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:17:53,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:17:53,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:53,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:17:53,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:17:53,707 INFO L87 Difference]: Start difference. First operand 365 states and 549 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:17:53,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:17:53,760 INFO L93 Difference]: Finished difference Result 719 states and 1087 transitions. [2021-12-06 18:17:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:17:53,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 126 [2021-12-06 18:17:53,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:17:53,764 INFO L225 Difference]: With dead ends: 719 [2021-12-06 18:17:53,764 INFO L226 Difference]: Without dead ends: 367 [2021-12-06 18:17:53,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:17:53,766 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 116 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:17:53,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1689 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:17:53,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-06 18:17:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2021-12-06 18:17:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 282 states have (on average 1.5212765957446808) internal successors, (429), 287 states have internal predecessors, (429), 60 states have call successors, (60), 22 states have call predecessors, (60), 24 states have return successors, (66), 59 states have call predecessors, (66), 59 states have call successors, (66) [2021-12-06 18:17:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 555 transitions. [2021-12-06 18:17:53,786 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 555 transitions. Word has length 126 [2021-12-06 18:17:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:17:53,787 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 555 transitions. [2021-12-06 18:17:53,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:17:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 555 transitions. [2021-12-06 18:17:53,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-06 18:17:53,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:17:53,790 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:17:53,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:17:53,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:17:53,991 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:17:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:53,991 INFO L85 PathProgramCache]: Analyzing trace with hash -214305394, now seen corresponding path program 1 times [2021-12-06 18:17:53,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:17:53,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674175579] [2021-12-06 18:17:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:53,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:17:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:17:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:17:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:17:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:17:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:17:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 18:17:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 18:17:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:17:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:17:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:17:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:17:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 18:17:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:17:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 18:17:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:17:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 18:17:54,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:17:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674175579] [2021-12-06 18:17:54,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674175579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:17:54,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:17:54,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 18:17:54,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188041230] [2021-12-06 18:17:54,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:17:54,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:17:54,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:54,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:17:54,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:17:54,108 INFO L87 Difference]: Start difference. First operand 367 states and 555 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:17:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:17:54,943 INFO L93 Difference]: Finished difference Result 779 states and 1184 transitions. [2021-12-06 18:17:54,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:17:54,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 127 [2021-12-06 18:17:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:17:54,947 INFO L225 Difference]: With dead ends: 779 [2021-12-06 18:17:54,947 INFO L226 Difference]: Without dead ends: 435 [2021-12-06 18:17:54,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:17:54,949 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 896 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:17:54,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [913 Valid, 1317 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:17:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-12-06 18:17:54,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 367. [2021-12-06 18:17:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 282 states have (on average 1.5212765957446808) internal successors, (429), 287 states have internal predecessors, (429), 60 states have call successors, (60), 22 states have call predecessors, (60), 24 states have return successors, (65), 59 states have call predecessors, (65), 59 states have call successors, (65) [2021-12-06 18:17:54,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 554 transitions. [2021-12-06 18:17:54,991 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 554 transitions. Word has length 127 [2021-12-06 18:17:54,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:17:54,991 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 554 transitions. [2021-12-06 18:17:54,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:17:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 554 transitions. [2021-12-06 18:17:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-06 18:17:54,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:17:54,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 18:17:54,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:17:54,994 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:17:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:54,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1524729219, now seen corresponding path program 2 times [2021-12-06 18:17:54,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:17:54,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300180252] [2021-12-06 18:17:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:54,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:17:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:17:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:17:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:17:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:17:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:17:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:17:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 18:17:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:17:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:17:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 18:17:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:17:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:17:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 18:17:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 18:17:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:17:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 18:17:55,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:17:55,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300180252] [2021-12-06 18:17:55,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300180252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:17:55,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:17:55,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 18:17:55,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954373165] [2021-12-06 18:17:55,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:17:55,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:17:55,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:17:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:17:55,090 INFO L87 Difference]: Start difference. First operand 367 states and 554 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:17:55,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:17:55,879 INFO L93 Difference]: Finished difference Result 781 states and 1187 transitions. [2021-12-06 18:17:55,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:17:55,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 128 [2021-12-06 18:17:55,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:17:55,883 INFO L225 Difference]: With dead ends: 781 [2021-12-06 18:17:55,883 INFO L226 Difference]: Without dead ends: 437 [2021-12-06 18:17:55,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:17:55,885 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 872 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:17:55,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 1324 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:17:55,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-12-06 18:17:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 369. [2021-12-06 18:17:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 283 states have (on average 1.519434628975265) internal successors, (430), 289 states have internal predecessors, (430), 60 states have call successors, (60), 22 states have call predecessors, (60), 25 states have return successors, (67), 59 states have call predecessors, (67), 59 states have call successors, (67) [2021-12-06 18:17:55,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 557 transitions. [2021-12-06 18:17:55,905 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 557 transitions. Word has length 128 [2021-12-06 18:17:55,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:17:55,906 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 557 transitions. [2021-12-06 18:17:55,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:17:55,906 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 557 transitions. [2021-12-06 18:17:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 18:17:55,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:17:55,908 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:17:55,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:17:55,908 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:17:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:55,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1406967309, now seen corresponding path program 1 times [2021-12-06 18:17:55,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:17:55,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437158420] [2021-12-06 18:17:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:55,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:17:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:17:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:17:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:17:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:17:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:17:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:17:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 18:17:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 18:17:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:56,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:17:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:56,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:17:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:56,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:17:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:56,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:17:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:56,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 18:17:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:56,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 18:17:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:56,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:17:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 18:17:56,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:17:56,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437158420] [2021-12-06 18:17:56,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437158420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:17:56,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:17:56,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 18:17:56,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741872947] [2021-12-06 18:17:56,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:17:56,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:17:56,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:56,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:17:56,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:17:56,022 INFO L87 Difference]: Start difference. First operand 369 states and 557 transitions. Second operand has 11 states, 10 states have (on average 8.3) internal successors, (83), 8 states have internal predecessors, (83), 4 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:17:57,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:17:57,080 INFO L93 Difference]: Finished difference Result 779 states and 1182 transitions. [2021-12-06 18:17:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:17:57,080 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 8 states have internal predecessors, (83), 4 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 129 [2021-12-06 18:17:57,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:17:57,083 INFO L225 Difference]: With dead ends: 779 [2021-12-06 18:17:57,083 INFO L226 Difference]: Without dead ends: 437 [2021-12-06 18:17:57,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:17:57,085 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 982 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:17:57,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 1734 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:17:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-12-06 18:17:57,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 369. [2021-12-06 18:17:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 283 states have (on average 1.519434628975265) internal successors, (430), 289 states have internal predecessors, (430), 60 states have call successors, (60), 22 states have call predecessors, (60), 25 states have return successors, (66), 59 states have call predecessors, (66), 59 states have call successors, (66) [2021-12-06 18:17:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 556 transitions. [2021-12-06 18:17:57,106 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 556 transitions. Word has length 129 [2021-12-06 18:17:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:17:57,106 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 556 transitions. [2021-12-06 18:17:57,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 8 states have internal predecessors, (83), 4 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:17:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 556 transitions. [2021-12-06 18:17:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-06 18:17:57,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:17:57,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 18:17:57,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:17:57,109 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:17:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:57,109 INFO L85 PathProgramCache]: Analyzing trace with hash 954508734, now seen corresponding path program 2 times [2021-12-06 18:17:57,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:17:57,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941255362] [2021-12-06 18:17:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:57,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:17:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:17:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:17:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:17:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:17:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:17:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:17:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 18:17:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:17:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:17:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 18:17:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:17:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:17:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 18:17:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 18:17:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:17:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 18:17:57,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:17:57,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941255362] [2021-12-06 18:17:57,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941255362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:17:57,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:17:57,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 18:17:57,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634295044] [2021-12-06 18:17:57,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:17:57,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:17:57,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:57,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:17:57,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:17:57,211 INFO L87 Difference]: Start difference. First operand 369 states and 556 transitions. Second operand has 11 states, 10 states have (on average 8.4) internal successors, (84), 8 states have internal predecessors, (84), 4 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:17:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:17:58,142 INFO L93 Difference]: Finished difference Result 781 states and 1188 transitions. [2021-12-06 18:17:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:17:58,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 8.4) internal successors, (84), 8 states have internal predecessors, (84), 4 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 130 [2021-12-06 18:17:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:17:58,145 INFO L225 Difference]: With dead ends: 781 [2021-12-06 18:17:58,145 INFO L226 Difference]: Without dead ends: 439 [2021-12-06 18:17:58,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:17:58,146 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 1006 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:17:58,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 1728 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 18:17:58,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-06 18:17:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 371. [2021-12-06 18:17:58,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 284 states have (on average 1.517605633802817) internal successors, (431), 291 states have internal predecessors, (431), 60 states have call successors, (60), 22 states have call predecessors, (60), 26 states have return successors, (71), 59 states have call predecessors, (71), 59 states have call successors, (71) [2021-12-06 18:17:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 562 transitions. [2021-12-06 18:17:58,171 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 562 transitions. Word has length 130 [2021-12-06 18:17:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:17:58,172 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 562 transitions. [2021-12-06 18:17:58,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 8.4) internal successors, (84), 8 states have internal predecessors, (84), 4 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:17:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 562 transitions. [2021-12-06 18:17:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 18:17:58,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:17:58,174 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:17:58,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:17:58,174 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:17:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:58,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1241338906, now seen corresponding path program 1 times [2021-12-06 18:17:58,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:17:58,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328003143] [2021-12-06 18:17:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:58,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:17:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:17:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:17:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:17:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:17:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:17:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:17:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:17:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:17:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 18:17:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:17:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 18:17:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 18:17:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-06 18:17:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 18:17:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:17:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 18:17:58,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:17:58,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328003143] [2021-12-06 18:17:58,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328003143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:17:58,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:17:58,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 18:17:58,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912446295] [2021-12-06 18:17:58,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:17:58,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:17:58,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:58,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:17:58,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:17:58,256 INFO L87 Difference]: Start difference. First operand 371 states and 562 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:17:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:17:58,868 INFO L93 Difference]: Finished difference Result 783 states and 1191 transitions. [2021-12-06 18:17:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:17:58,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 131 [2021-12-06 18:17:58,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:17:58,871 INFO L225 Difference]: With dead ends: 783 [2021-12-06 18:17:58,871 INFO L226 Difference]: Without dead ends: 439 [2021-12-06 18:17:58,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:17:58,873 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 863 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:17:58,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 1321 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:17:58,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-06 18:17:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 371. [2021-12-06 18:17:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 284 states have (on average 1.517605633802817) internal successors, (431), 291 states have internal predecessors, (431), 60 states have call successors, (60), 22 states have call predecessors, (60), 26 states have return successors, (71), 59 states have call predecessors, (71), 59 states have call successors, (71) [2021-12-06 18:17:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 562 transitions. [2021-12-06 18:17:58,891 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 562 transitions. Word has length 131 [2021-12-06 18:17:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:17:58,891 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 562 transitions. [2021-12-06 18:17:58,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:17:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 562 transitions. [2021-12-06 18:17:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 18:17:58,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:17:58,893 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:17:58,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:17:58,893 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:17:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1827615128, now seen corresponding path program 1 times [2021-12-06 18:17:58,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:17:58,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128231156] [2021-12-06 18:17:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:58,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:17:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:17:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:17:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:17:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:17:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:17:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:17:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 18:17:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:17:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 18:17:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:17:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 18:17:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 18:17:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-06 18:17:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 18:17:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:17:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:17:58,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:17:58,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128231156] [2021-12-06 18:17:58,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128231156] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:17:58,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099606407] [2021-12-06 18:17:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:58,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:17:58,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:17:58,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:17:58,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:17:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:59,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:17:59,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:17:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:17:59,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:17:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:17:59,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099606407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:17:59,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:17:59,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2021-12-06 18:17:59,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580803334] [2021-12-06 18:17:59,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:17:59,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:17:59,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:59,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:17:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:17:59,343 INFO L87 Difference]: Start difference. First operand 371 states and 562 transitions. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (34), 5 states have call predecessors, (34), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-12-06 18:18:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:00,046 INFO L93 Difference]: Finished difference Result 935 states and 1485 transitions. [2021-12-06 18:18:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:18:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (34), 5 states have call predecessors, (34), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 131 [2021-12-06 18:18:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:00,051 INFO L225 Difference]: With dead ends: 935 [2021-12-06 18:18:00,051 INFO L226 Difference]: Without dead ends: 766 [2021-12-06 18:18:00,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:18:00,052 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 1123 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:00,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1168 Valid, 1664 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:18:00,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-12-06 18:18:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 674. [2021-12-06 18:18:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 523 states have (on average 1.5850860420650095) internal successors, (829), 530 states have internal predecessors, (829), 124 states have call successors, (124), 22 states have call predecessors, (124), 26 states have return successors, (145), 123 states have call predecessors, (145), 123 states have call successors, (145) [2021-12-06 18:18:00,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1098 transitions. [2021-12-06 18:18:00,089 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1098 transitions. Word has length 131 [2021-12-06 18:18:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:00,090 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 1098 transitions. [2021-12-06 18:18:00,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (34), 5 states have call predecessors, (34), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-12-06 18:18:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1098 transitions. [2021-12-06 18:18:00,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-06 18:18:00,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:00,093 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:00,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:18:00,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 18:18:00,294 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:00,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:00,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1753103115, now seen corresponding path program 1 times [2021-12-06 18:18:00,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:00,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187024170] [2021-12-06 18:18:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:00,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:18:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:18:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:18:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:18:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:18:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 18:18:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:18:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:18:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 18:18:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 18:18:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-06 18:18:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 18:18:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-06 18:18:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:18:00,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:00,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187024170] [2021-12-06 18:18:00,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187024170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:00,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:00,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:18:00,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313338706] [2021-12-06 18:18:00,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:00,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:18:00,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:00,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:18:00,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:00,382 INFO L87 Difference]: Start difference. First operand 674 states and 1098 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:00,982 INFO L93 Difference]: Finished difference Result 1656 states and 2764 transitions. [2021-12-06 18:18:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:18:00,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2021-12-06 18:18:00,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:00,988 INFO L225 Difference]: With dead ends: 1656 [2021-12-06 18:18:00,989 INFO L226 Difference]: Without dead ends: 1050 [2021-12-06 18:18:00,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:18:00,991 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 903 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:00,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1112 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:18:00,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-12-06 18:18:01,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 974. [2021-12-06 18:18:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 759 states have (on average 1.5994729907773386) internal successors, (1214), 766 states have internal predecessors, (1214), 188 states have call successors, (188), 22 states have call predecessors, (188), 26 states have return successors, (219), 187 states have call predecessors, (219), 187 states have call successors, (219) [2021-12-06 18:18:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1621 transitions. [2021-12-06 18:18:01,040 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1621 transitions. Word has length 137 [2021-12-06 18:18:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:01,040 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 1621 transitions. [2021-12-06 18:18:01,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1621 transitions. [2021-12-06 18:18:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-06 18:18:01,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:01,045 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:01,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:18:01,045 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:01,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:01,046 INFO L85 PathProgramCache]: Analyzing trace with hash 960373373, now seen corresponding path program 1 times [2021-12-06 18:18:01,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:01,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457154984] [2021-12-06 18:18:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:01,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:18:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:18:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:18:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:18:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:18:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 18:18:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 18:18:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 18:18:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:18:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 18:18:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 18:18:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 18:18:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 18:18:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:18:01,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:01,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457154984] [2021-12-06 18:18:01,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457154984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:01,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:01,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:18:01,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466402637] [2021-12-06 18:18:01,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:01,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:18:01,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:01,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:18:01,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:01,119 INFO L87 Difference]: Start difference. First operand 974 states and 1621 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:01,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:01,656 INFO L93 Difference]: Finished difference Result 2371 states and 4009 transitions. [2021-12-06 18:18:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:18:01,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 138 [2021-12-06 18:18:01,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:01,666 INFO L225 Difference]: With dead ends: 2371 [2021-12-06 18:18:01,666 INFO L226 Difference]: Without dead ends: 1518 [2021-12-06 18:18:01,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:18:01,670 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 897 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:01,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 1060 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:18:01,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-12-06 18:18:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1442. [2021-12-06 18:18:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1132 states have (on average 1.6086572438162545) internal successors, (1821), 1139 states have internal predecessors, (1821), 283 states have call successors, (283), 22 states have call predecessors, (283), 26 states have return successors, (314), 282 states have call predecessors, (314), 282 states have call successors, (314) [2021-12-06 18:18:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2418 transitions. [2021-12-06 18:18:01,755 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2418 transitions. Word has length 138 [2021-12-06 18:18:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:01,755 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 2418 transitions. [2021-12-06 18:18:01,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2418 transitions. [2021-12-06 18:18:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 18:18:01,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:01,762 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:01,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:18:01,762 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:01,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:01,763 INFO L85 PathProgramCache]: Analyzing trace with hash 391585495, now seen corresponding path program 1 times [2021-12-06 18:18:01,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:01,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566738231] [2021-12-06 18:18:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:01,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:18:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:18:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:18:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:18:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:18:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 18:18:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 18:18:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:18:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:18:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:18:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 18:18:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 18:18:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 18:18:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:18:01,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:01,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566738231] [2021-12-06 18:18:01,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566738231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:01,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:01,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:18:01,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17367576] [2021-12-06 18:18:01,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:01,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:18:01,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:01,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:18:01,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:01,834 INFO L87 Difference]: Start difference. First operand 1442 states and 2418 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:02,487 INFO L93 Difference]: Finished difference Result 3418 states and 5850 transitions. [2021-12-06 18:18:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:18:02,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 139 [2021-12-06 18:18:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:02,501 INFO L225 Difference]: With dead ends: 3418 [2021-12-06 18:18:02,501 INFO L226 Difference]: Without dead ends: 2222 [2021-12-06 18:18:02,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:18:02,505 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 889 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:02,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 1087 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:18:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-12-06 18:18:02,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2146. [2021-12-06 18:18:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 1713 states have (on average 1.6158785755983653) internal successors, (2768), 1720 states have internal predecessors, (2768), 406 states have call successors, (406), 22 states have call predecessors, (406), 26 states have return successors, (453), 405 states have call predecessors, (453), 405 states have call successors, (453) [2021-12-06 18:18:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3627 transitions. [2021-12-06 18:18:02,634 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3627 transitions. Word has length 139 [2021-12-06 18:18:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:02,634 INFO L470 AbstractCegarLoop]: Abstraction has 2146 states and 3627 transitions. [2021-12-06 18:18:02,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3627 transitions. [2021-12-06 18:18:02,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 18:18:02,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:02,642 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:02,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:18:02,643 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:02,643 INFO L85 PathProgramCache]: Analyzing trace with hash -736236066, now seen corresponding path program 1 times [2021-12-06 18:18:02,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:02,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773571477] [2021-12-06 18:18:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:02,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:18:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:18:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:18:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:18:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:18:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 18:18:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 18:18:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 18:18:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:18:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 18:18:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 18:18:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 18:18:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 18:18:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:18:02,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:02,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773571477] [2021-12-06 18:18:02,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773571477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:02,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:02,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:18:02,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272400903] [2021-12-06 18:18:02,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:02,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:18:02,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:02,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:18:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:02,721 INFO L87 Difference]: Start difference. First operand 2146 states and 3627 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:03,373 INFO L93 Difference]: Finished difference Result 5037 states and 8704 transitions. [2021-12-06 18:18:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:18:03,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2021-12-06 18:18:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:03,390 INFO L225 Difference]: With dead ends: 5037 [2021-12-06 18:18:03,390 INFO L226 Difference]: Without dead ends: 3341 [2021-12-06 18:18:03,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:18:03,395 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 855 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:03,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1101 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:18:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-12-06 18:18:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 3265. [2021-12-06 18:18:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3265 states, 2653 states have (on average 1.6204297022238974) internal successors, (4299), 2660 states have internal predecessors, (4299), 585 states have call successors, (585), 22 states have call predecessors, (585), 26 states have return successors, (658), 584 states have call predecessors, (658), 584 states have call successors, (658) [2021-12-06 18:18:03,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3265 states to 3265 states and 5542 transitions. [2021-12-06 18:18:03,547 INFO L78 Accepts]: Start accepts. Automaton has 3265 states and 5542 transitions. Word has length 140 [2021-12-06 18:18:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:03,548 INFO L470 AbstractCegarLoop]: Abstraction has 3265 states and 5542 transitions. [2021-12-06 18:18:03,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3265 states and 5542 transitions. [2021-12-06 18:18:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 18:18:03,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:03,558 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:03,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 18:18:03,558 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:03,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:03,559 INFO L85 PathProgramCache]: Analyzing trace with hash -950274605, now seen corresponding path program 1 times [2021-12-06 18:18:03,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:03,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116753121] [2021-12-06 18:18:03,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:03,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:18:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:18:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:18:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:18:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:18:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 18:18:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 18:18:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-06 18:18:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:18:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 18:18:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 18:18:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 18:18:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 18:18:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:18:03,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:03,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116753121] [2021-12-06 18:18:03,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116753121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:03,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:03,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:18:03,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35514611] [2021-12-06 18:18:03,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:03,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:18:03,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:03,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:18:03,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:03,631 INFO L87 Difference]: Start difference. First operand 3265 states and 5542 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:04,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:04,348 INFO L93 Difference]: Finished difference Result 7955 states and 13803 transitions. [2021-12-06 18:18:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:18:04,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 141 [2021-12-06 18:18:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:04,377 INFO L225 Difference]: With dead ends: 7955 [2021-12-06 18:18:04,377 INFO L226 Difference]: Without dead ends: 5372 [2021-12-06 18:18:04,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:18:04,384 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 891 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:04,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 1098 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:18:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5372 states. [2021-12-06 18:18:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5372 to 5296. [2021-12-06 18:18:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5296 states, 4308 states have (on average 1.6135097493036212) internal successors, (6951), 4315 states have internal predecessors, (6951), 961 states have call successors, (961), 22 states have call predecessors, (961), 26 states have return successors, (1078), 960 states have call predecessors, (1078), 960 states have call successors, (1078) [2021-12-06 18:18:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5296 states to 5296 states and 8990 transitions. [2021-12-06 18:18:04,657 INFO L78 Accepts]: Start accepts. Automaton has 5296 states and 8990 transitions. Word has length 141 [2021-12-06 18:18:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:04,657 INFO L470 AbstractCegarLoop]: Abstraction has 5296 states and 8990 transitions. [2021-12-06 18:18:04,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 5296 states and 8990 transitions. [2021-12-06 18:18:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 18:18:04,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:04,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:04,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 18:18:04,677 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2125382370, now seen corresponding path program 1 times [2021-12-06 18:18:04,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:04,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264699747] [2021-12-06 18:18:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:04,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:18:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:18:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:18:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:18:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:18:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-06 18:18:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 18:18:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 18:18:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 18:18:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-06 18:18:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 18:18:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 18:18:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-06 18:18:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:18:04,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:04,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264699747] [2021-12-06 18:18:04,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264699747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:04,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:04,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:18:04,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030653630] [2021-12-06 18:18:04,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:04,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:18:04,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:04,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:18:04,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:04,753 INFO L87 Difference]: Start difference. First operand 5296 states and 8990 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:05,598 INFO L93 Difference]: Finished difference Result 13097 states and 22712 transitions. [2021-12-06 18:18:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:18:05,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 142 [2021-12-06 18:18:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:05,638 INFO L225 Difference]: With dead ends: 13097 [2021-12-06 18:18:05,638 INFO L226 Difference]: Without dead ends: 8860 [2021-12-06 18:18:05,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:18:05,661 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 891 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:05,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 1064 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:18:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8860 states. [2021-12-06 18:18:06,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8860 to 8784. [2021-12-06 18:18:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8784 states, 7190 states have (on average 1.6112656467315716) internal successors, (11585), 7197 states have internal predecessors, (11585), 1567 states have call successors, (1567), 22 states have call predecessors, (1567), 26 states have return successors, (1762), 1566 states have call predecessors, (1762), 1566 states have call successors, (1762) [2021-12-06 18:18:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 14914 transitions. [2021-12-06 18:18:06,071 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 14914 transitions. Word has length 142 [2021-12-06 18:18:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:06,072 INFO L470 AbstractCegarLoop]: Abstraction has 8784 states and 14914 transitions. [2021-12-06 18:18:06,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:06,073 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 14914 transitions. [2021-12-06 18:18:06,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-06 18:18:06,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:06,098 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:06,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 18:18:06,098 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:06,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:06,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2006253163, now seen corresponding path program 1 times [2021-12-06 18:18:06,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:06,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230567263] [2021-12-06 18:18:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:06,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:18:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:18:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:18:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:18:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:18:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 18:18:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 18:18:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 18:18:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 18:18:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-06 18:18:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 18:18:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 18:18:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-06 18:18:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:18:06,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:06,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230567263] [2021-12-06 18:18:06,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230567263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:06,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:06,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:18:06,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713506279] [2021-12-06 18:18:06,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:06,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:18:06,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:06,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:18:06,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:06,178 INFO L87 Difference]: Start difference. First operand 8784 states and 14914 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:07,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:07,155 INFO L93 Difference]: Finished difference Result 22756 states and 39418 transitions. [2021-12-06 18:18:07,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:18:07,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 143 [2021-12-06 18:18:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:07,198 INFO L225 Difference]: With dead ends: 22756 [2021-12-06 18:18:07,198 INFO L226 Difference]: Without dead ends: 15453 [2021-12-06 18:18:07,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:18:07,216 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 865 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:07,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 1117 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:18:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15453 states. [2021-12-06 18:18:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15453 to 15377. [2021-12-06 18:18:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15377 states, 12580 states have (on average 1.6018282988871224) internal successors, (20151), 12587 states have internal predecessors, (20151), 2770 states have call successors, (2770), 22 states have call predecessors, (2770), 26 states have return successors, (3109), 2769 states have call predecessors, (3109), 2769 states have call successors, (3109) [2021-12-06 18:18:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15377 states to 15377 states and 26030 transitions. [2021-12-06 18:18:07,934 INFO L78 Accepts]: Start accepts. Automaton has 15377 states and 26030 transitions. Word has length 143 [2021-12-06 18:18:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:07,935 INFO L470 AbstractCegarLoop]: Abstraction has 15377 states and 26030 transitions. [2021-12-06 18:18:07,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 15377 states and 26030 transitions. [2021-12-06 18:18:07,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-06 18:18:07,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:07,961 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:07,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 18:18:07,961 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:07,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1315565085, now seen corresponding path program 1 times [2021-12-06 18:18:07,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:07,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122792331] [2021-12-06 18:18:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:07,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:07,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:07,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:18:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:18:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:18:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:18:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:18:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 18:18:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 18:18:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 18:18:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 18:18:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 18:18:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 18:18:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 18:18:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 18:18:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:18:08,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:08,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122792331] [2021-12-06 18:18:08,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122792331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:08,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:08,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:18:08,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658201257] [2021-12-06 18:18:08,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:08,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:18:08,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:18:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:08,035 INFO L87 Difference]: Start difference. First operand 15377 states and 26030 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:09,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:09,605 INFO L93 Difference]: Finished difference Result 40712 states and 70401 transitions. [2021-12-06 18:18:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:18:09,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 144 [2021-12-06 18:18:09,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:09,682 INFO L225 Difference]: With dead ends: 40712 [2021-12-06 18:18:09,682 INFO L226 Difference]: Without dead ends: 27423 [2021-12-06 18:18:09,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:18:09,705 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 897 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:09,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 1055 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:18:09,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27423 states. [2021-12-06 18:18:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27423 to 27347. [2021-12-06 18:18:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27347 states, 22511 states have (on average 1.5973968282173159) internal successors, (35959), 22518 states have internal predecessors, (35959), 4809 states have call successors, (4809), 22 states have call predecessors, (4809), 26 states have return successors, (5422), 4808 states have call predecessors, (5422), 4808 states have call successors, (5422) [2021-12-06 18:18:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27347 states to 27347 states and 46190 transitions. [2021-12-06 18:18:10,900 INFO L78 Accepts]: Start accepts. Automaton has 27347 states and 46190 transitions. Word has length 144 [2021-12-06 18:18:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:10,900 INFO L470 AbstractCegarLoop]: Abstraction has 27347 states and 46190 transitions. [2021-12-06 18:18:10,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 27347 states and 46190 transitions. [2021-12-06 18:18:10,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 18:18:10,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:10,929 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:10,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 18:18:10,929 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:10,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:10,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1254652489, now seen corresponding path program 1 times [2021-12-06 18:18:10,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:10,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032309403] [2021-12-06 18:18:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:10,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:18:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:18:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:18:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:18:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:18:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 18:18:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 18:18:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 18:18:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 18:18:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 18:18:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 18:18:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-06 18:18:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:18:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:18:10,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:10,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032309403] [2021-12-06 18:18:10,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032309403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:10,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:10,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:18:10,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368441281] [2021-12-06 18:18:10,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:10,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:18:10,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:10,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:18:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:10,999 INFO L87 Difference]: Start difference. First operand 27347 states and 46190 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:13,306 INFO L93 Difference]: Finished difference Result 74499 states and 128000 transitions. [2021-12-06 18:18:13,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:18:13,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 145 [2021-12-06 18:18:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:13,444 INFO L225 Difference]: With dead ends: 74499 [2021-12-06 18:18:13,444 INFO L226 Difference]: Without dead ends: 49972 [2021-12-06 18:18:13,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:18:13,548 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 867 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:13,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 1079 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:18:13,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49972 states. [2021-12-06 18:18:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49972 to 49896. [2021-12-06 18:18:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49896 states, 41345 states have (on average 1.5914862740355544) internal successors, (65800), 41352 states have internal predecessors, (65800), 8524 states have call successors, (8524), 22 states have call predecessors, (8524), 26 states have return successors, (9669), 8523 states have call predecessors, (9669), 8523 states have call successors, (9669) [2021-12-06 18:18:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49896 states to 49896 states and 83993 transitions. [2021-12-06 18:18:15,874 INFO L78 Accepts]: Start accepts. Automaton has 49896 states and 83993 transitions. Word has length 145 [2021-12-06 18:18:15,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:15,874 INFO L470 AbstractCegarLoop]: Abstraction has 49896 states and 83993 transitions. [2021-12-06 18:18:15,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 49896 states and 83993 transitions. [2021-12-06 18:18:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:18:15,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:15,923 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:15,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 18:18:15,924 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:15,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1634548419, now seen corresponding path program 1 times [2021-12-06 18:18:15,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:15,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039833599] [2021-12-06 18:18:15,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:15,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:18:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:18:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:18:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:18:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:18:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 18:18:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 18:18:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 18:18:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 18:18:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 18:18:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 18:18:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 18:18:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 18:18:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:18:15,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:15,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039833599] [2021-12-06 18:18:15,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039833599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:18:15,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:18:15,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:18:15,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235215896] [2021-12-06 18:18:15,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:18:15,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:18:15,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:18:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:18:15,995 INFO L87 Difference]: Start difference. First operand 49896 states and 83993 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:19,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:19,527 INFO L93 Difference]: Finished difference Result 92985 states and 160131 transitions. [2021-12-06 18:18:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:18:19,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 146 [2021-12-06 18:18:19,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:19,785 INFO L225 Difference]: With dead ends: 92985 [2021-12-06 18:18:19,785 INFO L226 Difference]: Without dead ends: 92816 [2021-12-06 18:18:19,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:18:19,818 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 891 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:19,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 1074 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:18:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92816 states. [2021-12-06 18:18:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92816 to 92740. [2021-12-06 18:18:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92740 states, 77390 states have (on average 1.5840031011758624) internal successors, (122586), 77397 states have internal predecessors, (122586), 15323 states have call successors, (15323), 22 states have call predecessors, (15323), 26 states have return successors, (17514), 15322 states have call predecessors, (17514), 15322 states have call successors, (17514) [2021-12-06 18:18:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92740 states to 92740 states and 155423 transitions. [2021-12-06 18:18:24,427 INFO L78 Accepts]: Start accepts. Automaton has 92740 states and 155423 transitions. Word has length 146 [2021-12-06 18:18:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:18:24,428 INFO L470 AbstractCegarLoop]: Abstraction has 92740 states and 155423 transitions. [2021-12-06 18:18:24,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:18:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 92740 states and 155423 transitions. [2021-12-06 18:18:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 18:18:24,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:18:24,475 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:18:24,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 18:18:24,475 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:18:24,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:18:24,475 INFO L85 PathProgramCache]: Analyzing trace with hash 761092662, now seen corresponding path program 1 times [2021-12-06 18:18:24,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:18:24,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861598720] [2021-12-06 18:18:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:24,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:18:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:18:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:18:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:18:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:18:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:18:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:18:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:18:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:18:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 18:18:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-06 18:18:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-06 18:18:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 18:18:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 18:18:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 18:18:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:18:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 18:18:24,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:18:24,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861598720] [2021-12-06 18:18:24,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861598720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:18:24,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881094466] [2021-12-06 18:18:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:18:24,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:18:24,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:18:24,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:18:24,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:18:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:18:24,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 18:18:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:18:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:18:24,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:18:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:18:25,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881094466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:18:25,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:18:25,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2021-12-06 18:18:25,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890793583] [2021-12-06 18:18:25,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:18:25,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 18:18:25,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:18:25,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 18:18:25,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:18:25,172 INFO L87 Difference]: Start difference. First operand 92740 states and 155423 transitions. Second operand has 30 states, 29 states have (on average 8.448275862068966) internal successors, (245), 23 states have internal predecessors, (245), 9 states have call successors, (45), 11 states have call predecessors, (45), 11 states have return successors, (39), 11 states have call predecessors, (39), 9 states have call successors, (39) [2021-12-06 18:18:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:18:49,124 INFO L93 Difference]: Finished difference Result 370812 states and 653918 transitions. [2021-12-06 18:18:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-12-06 18:18:49,124 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 8.448275862068966) internal successors, (245), 23 states have internal predecessors, (245), 9 states have call successors, (45), 11 states have call predecessors, (45), 11 states have return successors, (39), 11 states have call predecessors, (39), 9 states have call successors, (39) Word has length 147 [2021-12-06 18:18:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:18:50,661 INFO L225 Difference]: With dead ends: 370812 [2021-12-06 18:18:50,662 INFO L226 Difference]: Without dead ends: 370649 [2021-12-06 18:18:50,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6061 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2711, Invalid=16749, Unknown=0, NotChecked=0, Total=19460 [2021-12-06 18:18:50,789 INFO L933 BasicCegarLoop]: 1424 mSDtfsCounter, 5710 mSDsluCounter, 9613 mSDsCounter, 0 mSdLazyCounter, 29522 mSolverCounterSat, 4692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5722 SdHoareTripleChecker+Valid, 11037 SdHoareTripleChecker+Invalid, 34214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4692 IncrementalHoareTripleChecker+Valid, 29522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:18:50,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5722 Valid, 11037 Invalid, 34214 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4692 Valid, 29522 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2021-12-06 18:18:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370649 states. [2021-12-06 18:19:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370649 to 369477. [2021-12-06 18:19:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369477 states, 308460 states have (on average 1.5848862089087725) internal successors, (488874), 308268 states have internal predecessors, (488874), 60878 states have call successors, (60878), 120 states have call predecessors, (60878), 138 states have return successors, (84829), 61100 states have call predecessors, (84829), 60872 states have call successors, (84829) [2021-12-06 18:19:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369477 states to 369477 states and 634581 transitions. [2021-12-06 18:19:10,740 INFO L78 Accepts]: Start accepts. Automaton has 369477 states and 634581 transitions. Word has length 147 [2021-12-06 18:19:10,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:10,741 INFO L470 AbstractCegarLoop]: Abstraction has 369477 states and 634581 transitions. [2021-12-06 18:19:10,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 8.448275862068966) internal successors, (245), 23 states have internal predecessors, (245), 9 states have call successors, (45), 11 states have call predecessors, (45), 11 states have return successors, (39), 11 states have call predecessors, (39), 9 states have call successors, (39) [2021-12-06 18:19:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 369477 states and 634581 transitions. [2021-12-06 18:19:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 18:19:10,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:10,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:11,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:19:11,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:19:11,197 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:11,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1060672983, now seen corresponding path program 1 times [2021-12-06 18:19:11,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:11,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471165929] [2021-12-06 18:19:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:11,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:19:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:19:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:19:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:19:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:19:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:19:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:19:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:19:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 18:19:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 18:19:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 18:19:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 18:19:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 18:19:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-06 18:19:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:19:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 18:19:11,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:11,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471165929] [2021-12-06 18:19:11,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471165929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:19:11,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600078335] [2021-12-06 18:19:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:11,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:19:11,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:19:11,302 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:19:11,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:19:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:11,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:19:11,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:19:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:19:11,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:19:11,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600078335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:11,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:19:11,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2021-12-06 18:19:11,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368090589] [2021-12-06 18:19:11,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:11,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:19:11,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:11,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:19:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:19:11,593 INFO L87 Difference]: Start difference. First operand 369477 states and 634581 transitions. Second operand has 9 states, 8 states have (on average 13.0) internal successors, (104), 7 states have internal predecessors, (104), 4 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:19:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:19:25,316 INFO L93 Difference]: Finished difference Result 370913 states and 636646 transitions. [2021-12-06 18:19:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:19:25,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 13.0) internal successors, (104), 7 states have internal predecessors, (104), 4 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 149 [2021-12-06 18:19:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:19:26,712 INFO L225 Difference]: With dead ends: 370913 [2021-12-06 18:19:26,712 INFO L226 Difference]: Without dead ends: 369765 [2021-12-06 18:19:26,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:19:26,840 INFO L933 BasicCegarLoop]: 454 mSDtfsCounter, 656 mSDsluCounter, 2696 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 3150 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:19:26,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 3150 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:19:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369765 states. [2021-12-06 18:19:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369765 to 369753. [2021-12-06 18:19:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369753 states, 308644 states have (on average 1.5847708039035264) internal successors, (489130), 308466 states have internal predecessors, (489130), 60964 states have call successors, (60964), 126 states have call predecessors, (60964), 144 states have return successors, (84945), 61184 states have call predecessors, (84945), 60958 states have call successors, (84945) [2021-12-06 18:19:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369753 states to 369753 states and 635039 transitions. [2021-12-06 18:19:47,190 INFO L78 Accepts]: Start accepts. Automaton has 369753 states and 635039 transitions. Word has length 149 [2021-12-06 18:19:47,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:19:47,191 INFO L470 AbstractCegarLoop]: Abstraction has 369753 states and 635039 transitions. [2021-12-06 18:19:47,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 13.0) internal successors, (104), 7 states have internal predecessors, (104), 4 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-06 18:19:47,191 INFO L276 IsEmpty]: Start isEmpty. Operand 369753 states and 635039 transitions. [2021-12-06 18:19:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 18:19:47,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:19:47,447 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:19:47,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:19:47,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:19:47,649 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:19:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:19:47,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1925092031, now seen corresponding path program 1 times [2021-12-06 18:19:47,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:19:47,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89103541] [2021-12-06 18:19:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:47,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:19:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:19:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:19:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:19:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 18:19:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 18:19:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:19:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 18:19:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 18:19:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-06 18:19:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 18:19:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 18:19:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 18:19:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 18:19:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-06 18:19:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:19:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 18:19:47,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:19:47,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89103541] [2021-12-06 18:19:47,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89103541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:19:47,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262574889] [2021-12-06 18:19:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:19:47,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:19:47,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:19:47,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:19:47,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:19:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:19:47,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:19:47,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:19:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 18:19:47,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:19:47,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262574889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:19:47,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:19:47,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-06 18:19:47,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335682958] [2021-12-06 18:19:47,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:19:47,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:19:47,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:19:47,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:19:47,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:19:47,978 INFO L87 Difference]: Start difference. First operand 369753 states and 635039 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:20:03,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:03,805 INFO L93 Difference]: Finished difference Result 554633 states and 956886 transitions. [2021-12-06 18:20:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:20:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 149 [2021-12-06 18:20:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:05,197 INFO L225 Difference]: With dead ends: 554633 [2021-12-06 18:20:05,197 INFO L226 Difference]: Without dead ends: 369769 [2021-12-06 18:20:05,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:20:05,549 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 116 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:05,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 1688 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:20:05,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369769 states. [2021-12-06 18:20:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369769 to 369753. [2021-12-06 18:20:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369753 states, 308644 states have (on average 1.584764323946035) internal successors, (489128), 308466 states have internal predecessors, (489128), 60964 states have call successors, (60964), 126 states have call predecessors, (60964), 144 states have return successors, (84945), 61184 states have call predecessors, (84945), 60958 states have call successors, (84945) [2021-12-06 18:20:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369753 states to 369753 states and 635037 transitions. [2021-12-06 18:20:26,752 INFO L78 Accepts]: Start accepts. Automaton has 369753 states and 635037 transitions. Word has length 149 [2021-12-06 18:20:26,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:26,753 INFO L470 AbstractCegarLoop]: Abstraction has 369753 states and 635037 transitions. [2021-12-06 18:20:26,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-06 18:20:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 369753 states and 635037 transitions. [2021-12-06 18:20:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 18:20:27,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:27,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:27,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 18:20:27,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:27,217 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:27,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:27,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1158658433, now seen corresponding path program 1 times [2021-12-06 18:20:27,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:27,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312127065] [2021-12-06 18:20:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:27,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:20:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:20:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:20:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:20:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:20:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:20:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:20:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 18:20:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 18:20:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 18:20:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 18:20:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-06 18:20:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-06 18:20:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 18:20:27,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:27,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312127065] [2021-12-06 18:20:27,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312127065] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:20:27,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642373935] [2021-12-06 18:20:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:27,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:20:27,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:27,345 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:20:27,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:20:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 18:20:27,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:20:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:20:27,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:20:27,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642373935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:27,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:20:27,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 23 [2021-12-06 18:20:27,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990186530] [2021-12-06 18:20:27,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:27,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:20:27,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:27,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:20:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:20:27,828 INFO L87 Difference]: Start difference. First operand 369753 states and 635037 transitions. Second operand has 13 states, 12 states have (on average 9.333333333333334) internal successors, (112), 10 states have internal predecessors, (112), 6 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 18:20:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:57,548 INFO L93 Difference]: Finished difference Result 734449 states and 1283301 transitions. [2021-12-06 18:20:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:20:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 9.333333333333334) internal successors, (112), 10 states have internal predecessors, (112), 6 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 150 [2021-12-06 18:20:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:00,449 INFO L225 Difference]: With dead ends: 734449 [2021-12-06 18:21:00,450 INFO L226 Difference]: Without dead ends: 733677 [2021-12-06 18:21:00,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 18:21:00,696 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 1437 mSDsluCounter, 3809 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 4334 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:00,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1441 Valid, 4334 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:21:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733677 states. [2021-12-06 18:21:40,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733677 to 733297. [2021-12-06 18:21:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733297 states, 612340 states have (on average 1.586092693601594) internal successors, (971228), 611646 states have internal predecessors, (971228), 120640 states have call successors, (120640), 278 states have call predecessors, (120640), 316 states have return successors, (189711), 121428 states have call predecessors, (189711), 120626 states have call successors, (189711) [2021-12-06 18:21:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733297 states to 733297 states and 1281579 transitions. [2021-12-06 18:21:44,481 INFO L78 Accepts]: Start accepts. Automaton has 733297 states and 1281579 transitions. Word has length 150 [2021-12-06 18:21:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:44,482 INFO L470 AbstractCegarLoop]: Abstraction has 733297 states and 1281579 transitions. [2021-12-06 18:21:44,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 9.333333333333334) internal successors, (112), 10 states have internal predecessors, (112), 6 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 18:21:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 733297 states and 1281579 transitions. [2021-12-06 18:21:45,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 18:21:45,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:45,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:45,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 18:21:45,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:45,421 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:45,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:45,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1282731680, now seen corresponding path program 1 times [2021-12-06 18:21:45,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:45,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137056062] [2021-12-06 18:21:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:45,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:21:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:21:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:21:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:21:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:21:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:21:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:21:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:21:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 18:21:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 18:21:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 18:21:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 18:21:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-06 18:21:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-06 18:21:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:21:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 18:21:45,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137056062] [2021-12-06 18:21:45,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137056062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:21:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017618542] [2021-12-06 18:21:45,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:45,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:45,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:21:45,551 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:21:45,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:21:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:45,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 18:21:45,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:21:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:21:45,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:21:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 18:21:46,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017618542] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 18:21:46,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:21:46,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12, 12] total 24 [2021-12-06 18:21:46,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501204083] [2021-12-06 18:21:46,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:21:46,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:21:46,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:46,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:21:46,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:21:46,103 INFO L87 Difference]: Start difference. First operand 733297 states and 1281579 transitions. Second operand has 12 states, 11 states have (on average 9.454545454545455) internal successors, (104), 10 states have internal predecessors, (104), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 18:22:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:22:20,774 INFO L93 Difference]: Finished difference Result 735707 states and 1285103 transitions. [2021-12-06 18:22:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:22:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 9.454545454545455) internal successors, (104), 10 states have internal predecessors, (104), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 150 [2021-12-06 18:22:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:22:23,785 INFO L225 Difference]: With dead ends: 735707 [2021-12-06 18:22:23,785 INFO L226 Difference]: Without dead ends: 734267 [2021-12-06 18:22:24,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 18:22:24,041 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 1006 mSDsluCounter, 4062 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 4540 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:22:24,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1014 Valid, 4540 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:22:24,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734267 states. [2021-12-06 18:23:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734267 to 733755. [2021-12-06 18:23:11,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733755 states, 612669 states have (on average 1.585986886883456) internal successors, (971685), 611992 states have internal predecessors, (971685), 120730 states have call successors, (120730), 308 states have call predecessors, (120730), 355 states have return successors, (189851), 121518 states have call predecessors, (189851), 120714 states have call successors, (189851) [2021-12-06 18:23:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733755 states to 733755 states and 1282266 transitions. [2021-12-06 18:23:14,701 INFO L78 Accepts]: Start accepts. Automaton has 733755 states and 1282266 transitions. Word has length 150 [2021-12-06 18:23:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:23:14,701 INFO L470 AbstractCegarLoop]: Abstraction has 733755 states and 1282266 transitions. [2021-12-06 18:23:14,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 9.454545454545455) internal successors, (104), 10 states have internal predecessors, (104), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-06 18:23:14,702 INFO L276 IsEmpty]: Start isEmpty. Operand 733755 states and 1282266 transitions. [2021-12-06 18:23:15,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 18:23:15,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:23:15,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:23:15,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:23:15,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:23:15,615 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:23:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:23:15,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1266475390, now seen corresponding path program 1 times [2021-12-06 18:23:15,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:23:15,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751230849] [2021-12-06 18:23:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:23:15,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:23:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:23:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:23:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:23:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:23:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:23:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:23:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:23:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 18:23:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 18:23:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:23:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 18:23:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 18:23:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-06 18:23:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-06 18:23:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:23:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 18:23:15,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:23:15,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751230849] [2021-12-06 18:23:15,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751230849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:23:15,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:23:15,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:23:15,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488214018] [2021-12-06 18:23:15,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:23:15,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:23:15,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:23:15,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:23:15,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:23:15,689 INFO L87 Difference]: Start difference. First operand 733755 states and 1282266 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 4 states have internal predecessors, (100), 3 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:23:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:23:51,258 INFO L93 Difference]: Finished difference Result 734521 states and 1309128 transitions. [2021-12-06 18:23:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:23:51,259 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 4 states have internal predecessors, (100), 3 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 150 [2021-12-06 18:23:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:23:54,236 INFO L225 Difference]: With dead ends: 734521 [2021-12-06 18:23:54,236 INFO L226 Difference]: Without dead ends: 732853 [2021-12-06 18:23:54,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:23:54,491 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 796 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:23:54,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 1241 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:23:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732853 states. [2021-12-06 18:24:41,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732853 to 732131. [2021-12-06 18:24:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732131 states, 611465 states have (on average 1.586303386130032) internal successors, (969969), 610744 states have internal predecessors, (969969), 120434 states have call successors, (120434), 196 states have call predecessors, (120434), 231 states have return successors, (189515), 121222 states have call predecessors, (189515), 120426 states have call successors, (189515) [2021-12-06 18:24:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732131 states to 732131 states and 1279918 transitions. [2021-12-06 18:24:44,818 INFO L78 Accepts]: Start accepts. Automaton has 732131 states and 1279918 transitions. Word has length 150 [2021-12-06 18:24:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:24:44,818 INFO L470 AbstractCegarLoop]: Abstraction has 732131 states and 1279918 transitions. [2021-12-06 18:24:44,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 4 states have internal predecessors, (100), 3 states have call successors, (17), 5 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 18:24:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 732131 states and 1279918 transitions. [2021-12-06 18:24:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 18:24:45,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:24:45,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:24:45,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 18:24:45,360 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:24:45,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:24:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1541392211, now seen corresponding path program 1 times [2021-12-06 18:24:45,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:24:45,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532094554] [2021-12-06 18:24:45,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:45,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:24:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 18:24:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:24:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 18:24:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:24:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 18:24:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:24:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-06 18:24:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 18:24:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 18:24:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 18:24:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 18:24:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 18:24:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-06 18:24:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-06 18:24:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:24:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 18:24:45,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:24:45,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532094554] [2021-12-06 18:24:45,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532094554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:24:45,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853402385] [2021-12-06 18:24:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:24:45,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:24:45,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:24:45,459 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:24:45,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c867e6c2-afa9-4123-842a-8e519dbc443a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:24:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:24:45,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:24:45,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:24:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 18:24:45,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:24:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 18:24:45,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853402385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:24:45,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:24:45,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2021-12-06 18:24:45,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940483325] [2021-12-06 18:24:45,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:24:45,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:24:45,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:24:45,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:24:45,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:24:45,990 INFO L87 Difference]: Start difference. First operand 732131 states and 1279918 transitions. Second operand has 26 states, 25 states have (on average 10.4) internal successors, (260), 19 states have internal predecessors, (260), 7 states have call successors, (45), 11 states have call predecessors, (45), 10 states have return successors, (40), 8 states have call predecessors, (40), 7 states have call successors, (40) [2021-12-06 18:26:03,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:03,531 INFO L93 Difference]: Finished difference Result 1468433 states and 2669007 transitions. [2021-12-06 18:26:03,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 18:26:03,532 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 10.4) internal successors, (260), 19 states have internal predecessors, (260), 7 states have call successors, (45), 11 states have call predecessors, (45), 10 states have return successors, (40), 8 states have call predecessors, (40), 7 states have call successors, (40) Word has length 151 [2021-12-06 18:26:03,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted.