./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/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_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/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 64bit --witnessprinter.graph.data.programhash 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:59:59,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:59:59,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:59:59,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:59:59,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:59:59,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:59:59,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:59:59,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:59:59,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:59:59,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:59:59,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:59:59,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:59:59,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:59:59,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:59:59,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:59:59,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:59:59,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:59:59,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:59:59,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:59:59,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:59:59,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:59:59,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:59:59,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:59:59,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:59:59,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:59:59,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:59:59,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:59:59,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:59:59,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:59:59,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:59:59,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:59:59,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:59:59,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:59:59,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:59:59,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:59:59,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:59:59,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:59:59,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:59:59,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:59:59,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:59:59,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:59:59,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 18:59:59,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:59:59,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:59:59,554 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:59:59,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:59:59,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:59:59,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:59:59,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:59:59,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:59:59,556 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:59:59,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:59:59,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:59:59,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:59:59,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:59:59,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:59:59,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:59:59,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:59:59,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:59:59,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:59:59,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:59:59,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:59:59,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:59:59,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:59:59,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:59:59,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:59:59,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:59:59,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:59:59,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:59:59,558 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:59:59,559 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:59:59,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:59:59,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:59:59,559 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_71933c74-733a-4fa4-9215-3d318c734c5d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 [2021-12-06 18:59:59,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:59:59,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:59:59,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:59:59,760 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:59:59,760 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:59:59,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-12-06 18:59:59,809 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/data/526492942/eb75c7930d8b4ec49c91c48e2a35b860/FLAGb343b75c6 [2021-12-06 19:00:00,394 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:00:00,394 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-12-06 19:00:00,420 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/data/526492942/eb75c7930d8b4ec49c91c48e2a35b860/FLAGb343b75c6 [2021-12-06 19:00:00,853 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/data/526492942/eb75c7930d8b4ec49c91c48e2a35b860 [2021-12-06 19:00:00,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:00:00,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:00:00,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:00:00,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:00:00,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:00:00,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:00:00" (1/1) ... [2021-12-06 19:00:00,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4c3e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:00, skipping insertion in model container [2021-12-06 19:00:00,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:00:00" (1/1) ... [2021-12-06 19:00:00,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:00:00,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:00:01,736 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_71933c74-733a-4fa4-9215-3d318c734c5d/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2021-12-06 19:00:01,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:00:01,784 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:00:01,952 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_71933c74-733a-4fa4-9215-3d318c734c5d/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2021-12-06 19:00:01,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:00:02,027 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:00:02,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:02 WrapperNode [2021-12-06 19:00:02,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:00:02,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:00:02,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:00:02,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:00:02,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:02" (1/1) ... [2021-12-06 19:00:02,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:02" (1/1) ... [2021-12-06 19:00:02,164 INFO L137 Inliner]: procedures = 191, calls = 1267, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3340 [2021-12-06 19:00:02,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:00:02,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:00:02,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:00:02,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:00:02,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:02" (1/1) ... [2021-12-06 19:00:02,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:02" (1/1) ... [2021-12-06 19:00:02,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:02" (1/1) ... [2021-12-06 19:00:02,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:02" (1/1) ... [2021-12-06 19:00:02,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:02" (1/1) ... [2021-12-06 19:00:02,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:02" (1/1) ... [2021-12-06 19:00:02,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:02" (1/1) ... [2021-12-06 19:00:02,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:00:02,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:00:02,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:00:02,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:00:02,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:02" (1/1) ... [2021-12-06 19:00:02,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:00:02,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:00:02,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:00:02,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:00:02,371 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-06 19:00:02,371 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-06 19:00:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-06 19:00:02,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-06 19:00:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-06 19:00:02,372 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-06 19:00:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-06 19:00:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-06 19:00:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-06 19:00:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:00:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-06 19:00:02,372 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-06 19:00:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-06 19:00:02,373 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-06 19:00:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-06 19:00:02,373 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-06 19:00:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-06 19:00:02,373 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-06 19:00:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-06 19:00:02,373 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-06 19:00:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-06 19:00:02,374 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-06 19:00:02,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-06 19:00:02,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-06 19:00:02,374 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-06 19:00:02,374 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-06 19:00:02,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2021-12-06 19:00:02,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2021-12-06 19:00:02,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-06 19:00:02,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-06 19:00:02,374 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-06 19:00:02,375 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-06 19:00:02,375 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-06 19:00:02,375 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-06 19:00:02,375 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-06 19:00:02,375 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-06 19:00:02,375 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-06 19:00:02,375 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-06 19:00:02,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:00:02,375 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-06 19:00:02,376 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-06 19:00:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-06 19:00:02,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-06 19:00:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-06 19:00:02,376 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-06 19:00:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-06 19:00:02,376 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-06 19:00:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-06 19:00:02,376 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-06 19:00:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-06 19:00:02,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-06 19:00:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-06 19:00:02,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-06 19:00:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-06 19:00:02,377 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-06 19:00:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:00:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-06 19:00:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-06 19:00:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-06 19:00:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-06 19:00:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-06 19:00:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-06 19:00:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-06 19:00:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-06 19:00:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-06 19:00:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-06 19:00:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:00:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-06 19:00:02,379 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-06 19:00:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-06 19:00:02,379 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-06 19:00:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:00:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 19:00:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-06 19:00:02,379 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-06 19:00:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-06 19:00:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-06 19:00:02,380 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-06 19:00:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-06 19:00:02,380 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-06 19:00:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 19:00:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-06 19:00:02,380 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-06 19:00:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-06 19:00:02,380 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-06 19:00:02,381 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-06 19:00:02,381 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-06 19:00:02,381 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-06 19:00:02,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-06 19:00:02,381 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-06 19:00:02,381 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-06 19:00:02,381 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-06 19:00:02,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-06 19:00:02,381 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-06 19:00:02,381 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-06 19:00:02,382 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-06 19:00:02,382 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-06 19:00:02,382 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-06 19:00:02,382 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-06 19:00:02,382 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-06 19:00:02,382 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-06 19:00:02,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:00:02,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 19:00:02,382 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-06 19:00:02,383 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-06 19:00:02,383 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-06 19:00:02,383 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-06 19:00:02,383 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-06 19:00:02,383 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-06 19:00:02,383 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-06 19:00:02,383 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-06 19:00:02,383 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-06 19:00:02,383 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-06 19:00:02,383 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-06 19:00:02,384 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-06 19:00:02,384 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-06 19:00:02,384 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-06 19:00:02,384 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-06 19:00:02,384 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-06 19:00:02,384 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-06 19:00:02,384 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-06 19:00:02,384 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-06 19:00:02,384 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-06 19:00:02,385 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-06 19:00:02,385 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-06 19:00:02,385 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-06 19:00:02,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-06 19:00:02,385 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-06 19:00:02,385 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-06 19:00:02,385 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-06 19:00:02,385 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-06 19:00:02,385 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-06 19:00:02,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-06 19:00:02,386 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-06 19:00:02,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-06 19:00:02,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:00:02,386 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-06 19:00:02,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-06 19:00:02,386 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-06 19:00:02,386 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-06 19:00:02,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-06 19:00:02,386 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-06 19:00:02,387 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-06 19:00:02,387 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-06 19:00:02,387 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-06 19:00:02,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:00:02,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:00:02,387 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-06 19:00:02,387 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-06 19:00:02,775 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:00:02,778 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:00:16,978 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:00:16,997 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:00:16,997 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 19:00:17,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:00:17 BoogieIcfgContainer [2021-12-06 19:00:17,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:00:17,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:00:17,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:00:17,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:00:17,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:00:00" (1/3) ... [2021-12-06 19:00:17,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d73dd43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:00:17, skipping insertion in model container [2021-12-06 19:00:17,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:00:02" (2/3) ... [2021-12-06 19:00:17,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d73dd43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:00:17, skipping insertion in model container [2021-12-06 19:00:17,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:00:17" (3/3) ... [2021-12-06 19:00:17,008 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-12-06 19:00:17,012 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:00:17,012 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:00:17,056 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:00:17,061 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 19:00:17,062 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:00:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 1225 states, 841 states have (on average 1.375743162901308) internal successors, (1157), 881 states have internal predecessors, (1157), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) [2021-12-06 19:00:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 19:00:17,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:00:17,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:17,102 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:00:17,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:17,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1560528525, now seen corresponding path program 1 times [2021-12-06 19:00:17,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:17,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110857172] [2021-12-06 19:00:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:17,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:17,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:00:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:17,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:00:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:17,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:17,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110857172] [2021-12-06 19:00:17,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110857172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:00:17,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:00:17,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:00:17,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627610743] [2021-12-06 19:00:17,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:00:17,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:00:17,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:17,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:00:17,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:00:17,644 INFO L87 Difference]: Start difference. First operand has 1225 states, 841 states have (on average 1.375743162901308) internal successors, (1157), 881 states have internal predecessors, (1157), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 19:00:19,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:00:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:00:23,174 INFO L93 Difference]: Finished difference Result 3954 states and 5954 transitions. [2021-12-06 19:00:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:00:23,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-12-06 19:00:23,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:00:23,206 INFO L225 Difference]: With dead ends: 3954 [2021-12-06 19:00:23,206 INFO L226 Difference]: Without dead ends: 2729 [2021-12-06 19:00:23,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:00:23,220 INFO L933 BasicCegarLoop]: 2075 mSDtfsCounter, 2721 mSDsluCounter, 2249 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 912 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3017 SdHoareTripleChecker+Valid, 4324 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:00:23,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3017 Valid, 4324 Invalid, 2031 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [912 Valid, 1118 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-12-06 19:00:23,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-12-06 19:00:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2224. [2021-12-06 19:00:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1510 states have (on average 1.3543046357615893) internal successors, (2045), 1568 states have internal predecessors, (2045), 593 states have call successors, (593), 122 states have call predecessors, (593), 120 states have return successors, (584), 577 states have call predecessors, (584), 584 states have call successors, (584) [2021-12-06 19:00:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3222 transitions. [2021-12-06 19:00:23,394 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3222 transitions. Word has length 17 [2021-12-06 19:00:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:00:23,394 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3222 transitions. [2021-12-06 19:00:23,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 19:00:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3222 transitions. [2021-12-06 19:00:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 19:00:23,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:00:23,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:23,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:00:23,396 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:00:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:23,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1132781344, now seen corresponding path program 1 times [2021-12-06 19:00:23,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:23,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704811762] [2021-12-06 19:00:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:23,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:23,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:00:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:23,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:00:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:23,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704811762] [2021-12-06 19:00:23,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704811762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:00:23,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:00:23,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:00:23,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062056574] [2021-12-06 19:00:23,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:00:23,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:00:23,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:23,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:00:23,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:00:23,609 INFO L87 Difference]: Start difference. First operand 2224 states and 3222 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 19:00:25,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:00:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:00:29,367 INFO L93 Difference]: Finished difference Result 6504 states and 9632 transitions. [2021-12-06 19:00:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:00:29,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-12-06 19:00:29,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:00:29,413 INFO L225 Difference]: With dead ends: 6504 [2021-12-06 19:00:29,414 INFO L226 Difference]: Without dead ends: 5418 [2021-12-06 19:00:29,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:00:29,421 INFO L933 BasicCegarLoop]: 2800 mSDtfsCounter, 2384 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 790 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2678 SdHoareTripleChecker+Valid, 5386 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 790 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:00:29,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2678 Valid, 5386 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [790 Valid, 1138 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-12-06 19:00:29,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-12-06 19:00:29,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4408. [2021-12-06 19:00:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 2997 states have (on average 1.3546880213546881) internal successors, (4060), 3107 states have internal predecessors, (4060), 1171 states have call successors, (1171), 243 states have call predecessors, (1171), 239 states have return successors, (1159), 1145 states have call predecessors, (1159), 1159 states have call successors, (1159) [2021-12-06 19:00:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6390 transitions. [2021-12-06 19:00:29,610 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6390 transitions. Word has length 18 [2021-12-06 19:00:29,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:00:29,610 INFO L470 AbstractCegarLoop]: Abstraction has 4408 states and 6390 transitions. [2021-12-06 19:00:29,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 19:00:29,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6390 transitions. [2021-12-06 19:00:29,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 19:00:29,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:00:29,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:29,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:00:29,612 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:00:29,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:29,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1342676608, now seen corresponding path program 1 times [2021-12-06 19:00:29,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:29,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930633749] [2021-12-06 19:00:29,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:29,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:29,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:00:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:29,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:00:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:29,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:00:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:29,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:00:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:29,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:29,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930633749] [2021-12-06 19:00:29,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930633749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:00:29,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:00:29,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:00:29,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665199574] [2021-12-06 19:00:29,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:00:29,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:00:29,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:29,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:00:29,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:00:29,810 INFO L87 Difference]: Start difference. First operand 4408 states and 6390 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:00:31,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:00:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:00:35,645 INFO L93 Difference]: Finished difference Result 11851 states and 17589 transitions. [2021-12-06 19:00:35,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:00:35,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2021-12-06 19:00:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:00:35,698 INFO L225 Difference]: With dead ends: 11851 [2021-12-06 19:00:35,699 INFO L226 Difference]: Without dead ends: 10750 [2021-12-06 19:00:35,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:00:35,708 INFO L933 BasicCegarLoop]: 2258 mSDtfsCounter, 2626 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 902 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2918 SdHoareTripleChecker+Valid, 4409 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:00:35,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2918 Valid, 4409 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1132 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-12-06 19:00:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-12-06 19:00:35,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 7676. [2021-12-06 19:00:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7676 states, 5224 states have (on average 1.354709035222052) internal successors, (7077), 5414 states have internal predecessors, (7077), 2033 states have call successors, (2033), 424 states have call predecessors, (2033), 418 states have return successors, (2019), 1991 states have call predecessors, (2019), 2019 states have call successors, (2019) [2021-12-06 19:00:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 11129 transitions. [2021-12-06 19:00:36,029 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 11129 transitions. Word has length 36 [2021-12-06 19:00:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:00:36,029 INFO L470 AbstractCegarLoop]: Abstraction has 7676 states and 11129 transitions. [2021-12-06 19:00:36,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 19:00:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 11129 transitions. [2021-12-06 19:00:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 19:00:36,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:00:36,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:36,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:00:36,031 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:00:36,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:36,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2327976, now seen corresponding path program 1 times [2021-12-06 19:00:36,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:36,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449406716] [2021-12-06 19:00:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:36,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:36,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:00:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:36,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:00:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:36,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:00:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:36,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:00:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:36,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:36,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449406716] [2021-12-06 19:00:36,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449406716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:00:36,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:00:36,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 19:00:36,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074872549] [2021-12-06 19:00:36,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:00:36,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:00:36,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:36,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:00:36,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:00:36,836 INFO L87 Difference]: Start difference. First operand 7676 states and 11129 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 19:00:38,871 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:00:56,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:00:56,943 INFO L93 Difference]: Finished difference Result 22061 states and 32715 transitions. [2021-12-06 19:00:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 19:00:56,944 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-12-06 19:00:56,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:00:57,020 INFO L225 Difference]: With dead ends: 22061 [2021-12-06 19:00:57,020 INFO L226 Difference]: Without dead ends: 16650 [2021-12-06 19:00:57,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-12-06 19:00:57,037 INFO L933 BasicCegarLoop]: 2612 mSDtfsCounter, 3303 mSDsluCounter, 24809 mSDsCounter, 0 mSdLazyCounter, 8542 mSolverCounterSat, 1477 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3601 SdHoareTripleChecker+Valid, 27421 SdHoareTripleChecker+Invalid, 10020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1477 IncrementalHoareTripleChecker+Valid, 8542 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:00:57,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3601 Valid, 27421 Invalid, 10020 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1477 Valid, 8542 Invalid, 1 Unknown, 0 Unchecked, 18.6s Time] [2021-12-06 19:00:57,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16650 states. [2021-12-06 19:00:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16650 to 10978. [2021-12-06 19:00:57,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10978 states, 7469 states have (on average 1.3542642924086223) internal successors, (10115), 7739 states have internal predecessors, (10115), 2905 states have call successors, (2905), 610 states have call predecessors, (2905), 603 states have return successors, (2893), 2848 states have call predecessors, (2893), 2890 states have call successors, (2893) [2021-12-06 19:00:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10978 states to 10978 states and 15913 transitions. [2021-12-06 19:00:57,476 INFO L78 Accepts]: Start accepts. Automaton has 10978 states and 15913 transitions. Word has length 38 [2021-12-06 19:00:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:00:57,476 INFO L470 AbstractCegarLoop]: Abstraction has 10978 states and 15913 transitions. [2021-12-06 19:00:57,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 19:00:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 10978 states and 15913 transitions. [2021-12-06 19:00:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 19:00:57,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:00:57,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:57,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:00:57,479 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:00:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1064452566, now seen corresponding path program 1 times [2021-12-06 19:00:57,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:57,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379959694] [2021-12-06 19:00:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:57,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:57,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:00:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:57,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:00:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:58,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:00:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:58,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:00:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:58,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:00:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:00:58,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:58,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379959694] [2021-12-06 19:00:58,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379959694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:00:58,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:00:58,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 19:00:58,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725300046] [2021-12-06 19:00:58,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:00:58,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 19:00:58,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 19:00:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:00:58,381 INFO L87 Difference]: Start difference. First operand 10978 states and 15913 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 19:01:00,411 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:01:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:01:23,207 INFO L93 Difference]: Finished difference Result 17437 states and 25948 transitions. [2021-12-06 19:01:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 19:01:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 45 [2021-12-06 19:01:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:01:23,282 INFO L225 Difference]: With dead ends: 17437 [2021-12-06 19:01:23,282 INFO L226 Difference]: Without dead ends: 16373 [2021-12-06 19:01:23,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 19:01:23,292 INFO L933 BasicCegarLoop]: 2293 mSDtfsCounter, 3981 mSDsluCounter, 23511 mSDsCounter, 0 mSdLazyCounter, 9539 mSolverCounterSat, 1829 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4268 SdHoareTripleChecker+Valid, 25804 SdHoareTripleChecker+Invalid, 11369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1829 IncrementalHoareTripleChecker+Valid, 9539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:01:23,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4268 Valid, 25804 Invalid, 11369 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1829 Valid, 9539 Invalid, 1 Unknown, 0 Unchecked, 22.9s Time] [2021-12-06 19:01:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16373 states. [2021-12-06 19:01:23,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16373 to 9922. [2021-12-06 19:01:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9922 states, 6754 states have (on average 1.3532721350310928) internal successors, (9140), 6998 states have internal predecessors, (9140), 2620 states have call successors, (2620), 554 states have call predecessors, (2620), 547 states have return successors, (2608), 2567 states have call predecessors, (2608), 2605 states have call successors, (2608) [2021-12-06 19:01:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9922 states to 9922 states and 14368 transitions. [2021-12-06 19:01:23,725 INFO L78 Accepts]: Start accepts. Automaton has 9922 states and 14368 transitions. Word has length 45 [2021-12-06 19:01:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:01:23,725 INFO L470 AbstractCegarLoop]: Abstraction has 9922 states and 14368 transitions. [2021-12-06 19:01:23,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 19:01:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 9922 states and 14368 transitions. [2021-12-06 19:01:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 19:01:23,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:01:23,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:01:23,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:01:23,728 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:01:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:01:23,729 INFO L85 PathProgramCache]: Analyzing trace with hash 575821089, now seen corresponding path program 1 times [2021-12-06 19:01:23,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:01:23,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858062827] [2021-12-06 19:01:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:01:23,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:01:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:23,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:01:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:23,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:01:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:23,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:01:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:23,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:01:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:23,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:01:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:23,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 19:01:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:23,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:01:23,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858062827] [2021-12-06 19:01:23,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858062827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:01:23,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:01:23,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:01:23,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377108127] [2021-12-06 19:01:23,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:01:23,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:01:23,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:01:23,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:01:23,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:01:23,918 INFO L87 Difference]: Start difference. First operand 9922 states and 14368 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:01:25,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:01:28,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:01:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:01:31,938 INFO L93 Difference]: Finished difference Result 14804 states and 22011 transitions. [2021-12-06 19:01:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:01:31,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 52 [2021-12-06 19:01:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:01:31,995 INFO L225 Difference]: With dead ends: 14804 [2021-12-06 19:01:31,995 INFO L226 Difference]: Without dead ends: 14783 [2021-12-06 19:01:32,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:01:32,003 INFO L933 BasicCegarLoop]: 3341 mSDtfsCounter, 2019 mSDsluCounter, 2642 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 669 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2303 SdHoareTripleChecker+Valid, 5983 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:01:32,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2303 Valid, 5983 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [669 Valid, 1145 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2021-12-06 19:01:32,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14783 states. [2021-12-06 19:01:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14783 to 7766. [2021-12-06 19:01:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7766 states, 5290 states have (on average 1.3506616257088846) internal successors, (7145), 5482 states have internal predecessors, (7145), 2046 states have call successors, (2046), 436 states have call predecessors, (2046), 429 states have return successors, (2036), 2001 states have call predecessors, (2036), 2033 states have call successors, (2036) [2021-12-06 19:01:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 11227 transitions. [2021-12-06 19:01:32,420 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 11227 transitions. Word has length 52 [2021-12-06 19:01:32,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:01:32,421 INFO L470 AbstractCegarLoop]: Abstraction has 7766 states and 11227 transitions. [2021-12-06 19:01:32,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:01:32,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 11227 transitions. [2021-12-06 19:01:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 19:01:32,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:01:32,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:01:32,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:01:32,424 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:01:32,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:01:32,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1749749551, now seen corresponding path program 1 times [2021-12-06 19:01:32,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:01:32,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404897961] [2021-12-06 19:01:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:01:32,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:01:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:32,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:01:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:01:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:32,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:01:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:33,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 19:01:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:33,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:01:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:33,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 19:01:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:33,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:01:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 19:01:33,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:01:33,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404897961] [2021-12-06 19:01:33,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404897961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:01:33,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641685288] [2021-12-06 19:01:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:01:33,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:01:33,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:01:33,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:01:33,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:01:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:38,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 19:01:38,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:01:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:39,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:01:39,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641685288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:01:39,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:01:39,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [11] total 22 [2021-12-06 19:01:39,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916104220] [2021-12-06 19:01:39,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:01:39,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:01:39,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:01:39,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:01:39,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:01:39,813 INFO L87 Difference]: Start difference. First operand 7766 states and 11227 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 5 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 19:01:41,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:01:43,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:01:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:01:52,869 INFO L93 Difference]: Finished difference Result 9920 states and 14353 transitions. [2021-12-06 19:01:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 19:01:52,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 5 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 53 [2021-12-06 19:01:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:01:52,888 INFO L225 Difference]: With dead ends: 9920 [2021-12-06 19:01:52,889 INFO L226 Difference]: Without dead ends: 5567 [2021-12-06 19:01:52,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 19:01:52,903 INFO L933 BasicCegarLoop]: 1519 mSDtfsCounter, 2251 mSDsluCounter, 14525 mSDsCounter, 0 mSdLazyCounter, 2719 mSolverCounterSat, 492 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2256 SdHoareTripleChecker+Valid, 16044 SdHoareTripleChecker+Invalid, 3213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 2719 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:01:52,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2256 Valid, 16044 Invalid, 3213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 2719 Invalid, 2 Unknown, 0 Unchecked, 11.2s Time] [2021-12-06 19:01:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-12-06 19:01:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 3335. [2021-12-06 19:01:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3335 states, 2269 states have (on average 1.3494931687968268) internal successors, (3062), 2350 states have internal predecessors, (3062), 879 states have call successors, (879), 190 states have call predecessors, (879), 186 states have return successors, (872), 860 states have call predecessors, (872), 872 states have call successors, (872) [2021-12-06 19:01:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 4813 transitions. [2021-12-06 19:01:53,133 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 4813 transitions. Word has length 53 [2021-12-06 19:01:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:01:53,134 INFO L470 AbstractCegarLoop]: Abstraction has 3335 states and 4813 transitions. [2021-12-06 19:01:53,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 5 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 19:01:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 4813 transitions. [2021-12-06 19:01:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 19:01:53,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:01:53,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:53,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:01:53,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71933c74-733a-4fa4-9215-3d318c734c5d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:01:53,336 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:01:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:01:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1357667059, now seen corresponding path program 1 times [2021-12-06 19:01:53,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:01:53,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106992469] [2021-12-06 19:01:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:01:53,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:01:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:53,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:01:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:53,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:01:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:53,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:01:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:53,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:01:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:53,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:01:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:53,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 19:01:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:53,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:01:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:53,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:01:53,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106992469] [2021-12-06 19:01:53,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106992469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:01:53,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:01:53,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 19:01:53,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63769260] [2021-12-06 19:01:53,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:01:53,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:01:53,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:01:53,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:01:53,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:01:53,599 INFO L87 Difference]: Start difference. First operand 3335 states and 4813 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:01:55,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:01:57,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:02:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:02:12,645 INFO L93 Difference]: Finished difference Result 5947 states and 8909 transitions. [2021-12-06 19:02:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:02:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2021-12-06 19:02:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:02:12,659 INFO L225 Difference]: With dead ends: 5947 [2021-12-06 19:02:12,659 INFO L226 Difference]: Without dead ends: 4873 [2021-12-06 19:02:12,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:02:12,664 INFO L933 BasicCegarLoop]: 2035 mSDtfsCounter, 3254 mSDsluCounter, 4939 mSDsCounter, 0 mSdLazyCounter, 5877 mSolverCounterSat, 1929 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3488 SdHoareTripleChecker+Valid, 6974 SdHoareTripleChecker+Invalid, 7808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1929 IncrementalHoareTripleChecker+Valid, 5877 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:02:12,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3488 Valid, 6974 Invalid, 7808 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1929 Valid, 5877 Invalid, 2 Unknown, 0 Unchecked, 18.4s Time] [2021-12-06 19:02:12,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4873 states. [2021-12-06 19:02:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4873 to 3326. [2021-12-06 19:02:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 2263 states have (on average 1.3495360141405215) internal successors, (3054), 2343 states have internal predecessors, (3054), 876 states have call successors, (876), 190 states have call predecessors, (876), 186 states have return successors, (870), 858 states have call predecessors, (870), 870 states have call successors, (870) [2021-12-06 19:02:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 4800 transitions. [2021-12-06 19:02:12,868 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 4800 transitions. Word has length 64 [2021-12-06 19:02:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:02:12,868 INFO L470 AbstractCegarLoop]: Abstraction has 3326 states and 4800 transitions. [2021-12-06 19:02:12,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:02:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 4800 transitions. [2021-12-06 19:02:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 19:02:12,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:02:12,869 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 19:02:12,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:02:12,869 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:02:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:02:12,870 INFO L85 PathProgramCache]: Analyzing trace with hash -723478224, now seen corresponding path program 1 times [2021-12-06 19:02:12,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:02:12,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184826842] [2021-12-06 19:02:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:02:12,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:02:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:13,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:02:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:13,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:02:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:13,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:02:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:13,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:02:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:13,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:02:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:13,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:02:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:02:13,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:02:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184826842] [2021-12-06 19:02:13,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184826842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:02:13,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:02:13,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:02:13,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047294419] [2021-12-06 19:02:13,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:02:13,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:02:13,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:02:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:02:13,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:02:13,124 INFO L87 Difference]: Start difference. First operand 3326 states and 4800 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:02:15,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:02:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:02:20,575 INFO L93 Difference]: Finished difference Result 5449 states and 8071 transitions. [2021-12-06 19:02:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:02:20,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2021-12-06 19:02:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:02:20,586 INFO L225 Difference]: With dead ends: 5449 [2021-12-06 19:02:20,586 INFO L226 Difference]: Without dead ends: 3274 [2021-12-06 19:02:20,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:02:20,593 INFO L933 BasicCegarLoop]: 2284 mSDtfsCounter, 1614 mSDsluCounter, 8118 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 870 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 10402 SdHoareTripleChecker+Invalid, 3041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:02:20,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1807 Valid, 10402 Invalid, 3041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2170 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-12-06 19:02:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2021-12-06 19:02:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 2252. [2021-12-06 19:02:20,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 1535 states have (on average 1.3433224755700326) internal successors, (2062), 1588 states have internal predecessors, (2062), 587 states have call successors, (587), 132 states have call predecessors, (587), 129 states have return successors, (582), 575 states have call predecessors, (582), 582 states have call successors, (582) [2021-12-06 19:02:20,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 3231 transitions. [2021-12-06 19:02:20,735 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 3231 transitions. Word has length 63 [2021-12-06 19:02:20,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:02:20,736 INFO L470 AbstractCegarLoop]: Abstraction has 2252 states and 3231 transitions. [2021-12-06 19:02:20,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:02:20,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 3231 transitions. [2021-12-06 19:02:20,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 19:02:20,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:02:20,736 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 19:02:20,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 19:02:20,737 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:02:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:02:20,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1127472847, now seen corresponding path program 1 times [2021-12-06 19:02:20,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:02:20,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127120558] [2021-12-06 19:02:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:02:20,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:02:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:20,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:02:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:20,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:02:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:20,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:02:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:20,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:02:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:20,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:02:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:20,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:02:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:02:20,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:02:20,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127120558] [2021-12-06 19:02:20,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127120558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:02:20,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:02:20,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:02:20,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916429712] [2021-12-06 19:02:20,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:02:20,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:02:20,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:02:20,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:02:20,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:02:20,947 INFO L87 Difference]: Start difference. First operand 2252 states and 3231 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 19:02:22,972 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:02:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:02:28,531 INFO L93 Difference]: Finished difference Result 4081 states and 6041 transitions. [2021-12-06 19:02:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:02:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 66 [2021-12-06 19:02:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:02:28,541 INFO L225 Difference]: With dead ends: 4081 [2021-12-06 19:02:28,541 INFO L226 Difference]: Without dead ends: 3018 [2021-12-06 19:02:28,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:02:28,545 INFO L933 BasicCegarLoop]: 2075 mSDtfsCounter, 1541 mSDsluCounter, 6835 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 955 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 8910 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 955 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:02:28,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1737 Valid, 8910 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [955 Valid, 2176 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2021-12-06 19:02:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-12-06 19:02:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 2249. [2021-12-06 19:02:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 1532 states have (on average 1.3426892950391645) internal successors, (2057), 1585 states have internal predecessors, (2057), 587 states have call successors, (587), 132 states have call predecessors, (587), 129 states have return successors, (582), 575 states have call predecessors, (582), 582 states have call successors, (582) [2021-12-06 19:02:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 3226 transitions. [2021-12-06 19:02:28,693 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 3226 transitions. Word has length 66 [2021-12-06 19:02:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:02:28,693 INFO L470 AbstractCegarLoop]: Abstraction has 2249 states and 3226 transitions. [2021-12-06 19:02:28,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 19:02:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 3226 transitions. [2021-12-06 19:02:28,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 19:02:28,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:02:28,694 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 19:02:28,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 19:02:28,694 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:02:28,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:02:28,695 INFO L85 PathProgramCache]: Analyzing trace with hash -964928150, now seen corresponding path program 1 times [2021-12-06 19:02:28,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:02:28,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561911298] [2021-12-06 19:02:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:02:28,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:02:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:28,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:02:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:28,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:02:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:28,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:02:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:28,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:02:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:28,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:02:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:28,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:02:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:28,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:02:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:02:28,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:02:28,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561911298] [2021-12-06 19:02:28,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561911298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:02:28,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:02:28,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:02:28,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872566783] [2021-12-06 19:02:28,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:02:28,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:02:28,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:02:28,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:02:28,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:02:28,910 INFO L87 Difference]: Start difference. First operand 2249 states and 3226 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:02:30,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:02:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:02:35,952 INFO L93 Difference]: Finished difference Result 3829 states and 5615 transitions. [2021-12-06 19:02:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:02:35,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-12-06 19:02:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:02:35,961 INFO L225 Difference]: With dead ends: 3829 [2021-12-06 19:02:35,961 INFO L226 Difference]: Without dead ends: 2745 [2021-12-06 19:02:35,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:02:35,965 INFO L933 BasicCegarLoop]: 2223 mSDtfsCounter, 1514 mSDsluCounter, 7322 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 800 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 9545 SdHoareTripleChecker+Invalid, 2857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:02:35,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1592 Valid, 9545 Invalid, 2857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 2056 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2021-12-06 19:02:35,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-12-06 19:02:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2242. [2021-12-06 19:02:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1529 states have (on average 1.342053629823414) internal successors, (2052), 1581 states have internal predecessors, (2052), 584 states have call successors, (584), 130 states have call predecessors, (584), 128 states have return successors, (580), 574 states have call predecessors, (580), 580 states have call successors, (580) [2021-12-06 19:02:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3216 transitions. [2021-12-06 19:02:36,106 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3216 transitions. Word has length 69 [2021-12-06 19:02:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:02:36,107 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3216 transitions. [2021-12-06 19:02:36,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 19:02:36,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3216 transitions. [2021-12-06 19:02:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 19:02:36,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:02:36,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:02:36,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 19:02:36,108 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:02:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:02:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2888052, now seen corresponding path program 1 times [2021-12-06 19:02:36,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:02:36,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715208545] [2021-12-06 19:02:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:02:36,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:02:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:36,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:02:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:36,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:02:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:36,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:02:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:36,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:02:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:36,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:02:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:36,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:02:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:02:36,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:02:36,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715208545] [2021-12-06 19:02:36,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715208545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:02:36,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:02:36,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 19:02:36,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707703284] [2021-12-06 19:02:36,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:02:36,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:02:36,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:02:36,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:02:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:02:36,377 INFO L87 Difference]: Start difference. First operand 2242 states and 3216 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 19:02:38,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:02:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:02:44,928 INFO L93 Difference]: Finished difference Result 2747 states and 4046 transitions. [2021-12-06 19:02:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:02:44,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 68 [2021-12-06 19:02:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:02:44,936 INFO L225 Difference]: With dead ends: 2747 [2021-12-06 19:02:44,937 INFO L226 Difference]: Without dead ends: 2742 [2021-12-06 19:02:44,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:02:44,938 INFO L933 BasicCegarLoop]: 2004 mSDtfsCounter, 1939 mSDsluCounter, 8984 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 1046 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2129 SdHoareTripleChecker+Valid, 10988 SdHoareTripleChecker+Invalid, 3888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1046 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:02:44,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2129 Valid, 10988 Invalid, 3888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1046 Valid, 2841 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-12-06 19:02:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2021-12-06 19:02:45,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 2239. [2021-12-06 19:02:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2239 states, 1527 states have (on average 1.3418467583497053) internal successors, (2049), 1578 states have internal predecessors, (2049), 583 states have call successors, (583), 130 states have call predecessors, (583), 128 states have return successors, (580), 574 states have call predecessors, (580), 580 states have call successors, (580) [2021-12-06 19:02:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2239 states to 2239 states and 3212 transitions. [2021-12-06 19:02:45,081 INFO L78 Accepts]: Start accepts. Automaton has 2239 states and 3212 transitions. Word has length 68 [2021-12-06 19:02:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:02:45,082 INFO L470 AbstractCegarLoop]: Abstraction has 2239 states and 3212 transitions. [2021-12-06 19:02:45,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 19:02:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2239 states and 3212 transitions. [2021-12-06 19:02:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 19:02:45,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:02:45,083 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 19:02:45,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 19:02:45,083 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:02:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:02:45,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1229122377, now seen corresponding path program 1 times [2021-12-06 19:02:45,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:02:45,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717497152] [2021-12-06 19:02:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:02:45,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:02:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:45,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:02:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:45,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:02:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:45,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:02:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:45,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:02:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:45,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:02:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:45,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 19:02:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:45,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:02:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:45,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 19:02:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:45,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 19:02:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:02:45,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:02:45,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717497152] [2021-12-06 19:02:45,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717497152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:02:45,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:02:45,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 19:02:45,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119809606] [2021-12-06 19:02:45,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:02:45,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:02:45,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:02:45,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:02:45,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:02:45,367 INFO L87 Difference]: Start difference. First operand 2239 states and 3212 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 19:02:47,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:02:49,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:03:06,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:03:06,656 INFO L93 Difference]: Finished difference Result 2496 states and 3631 transitions. [2021-12-06 19:03:06,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:03:06,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 71 [2021-12-06 19:03:06,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:03:06,661 INFO L225 Difference]: With dead ends: 2496 [2021-12-06 19:03:06,661 INFO L226 Difference]: Without dead ends: 1415 [2021-12-06 19:03:06,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:03:06,665 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 1702 mSDsluCounter, 4487 mSDsCounter, 0 mSdLazyCounter, 7271 mSolverCounterSat, 892 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1826 SdHoareTripleChecker+Valid, 5955 SdHoareTripleChecker+Invalid, 8165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 7271 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:03:06,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1826 Valid, 5955 Invalid, 8165 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [892 Valid, 7271 Invalid, 2 Unknown, 0 Unchecked, 20.8s Time] [2021-12-06 19:03:06,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-12-06 19:03:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1161. [2021-12-06 19:03:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 794 states have (on average 1.3299748110831233) internal successors, (1056), 821 states have internal predecessors, (1056), 298 states have call successors, (298), 70 states have call predecessors, (298), 68 states have return successors, (294), 291 states have call predecessors, (294), 294 states have call successors, (294) [2021-12-06 19:03:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1648 transitions. [2021-12-06 19:03:06,747 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1648 transitions. Word has length 71 [2021-12-06 19:03:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:03:06,747 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1648 transitions. [2021-12-06 19:03:06,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 19:03:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1648 transitions. [2021-12-06 19:03:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 19:03:06,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:03:06,748 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 19:03:06,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 19:03:06,748 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:03:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:03:06,748 INFO L85 PathProgramCache]: Analyzing trace with hash -78799712, now seen corresponding path program 1 times [2021-12-06 19:03:06,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:03:06,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154271898] [2021-12-06 19:03:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:03:06,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:03:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:06,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:03:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:06,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:03:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:06,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:03:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:06,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:03:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:06,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:03:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:06,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:03:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:06,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 19:03:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:06,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:03:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:06,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 19:03:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:03:06,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:03:06,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154271898] [2021-12-06 19:03:06,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154271898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:03:06,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:03:06,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:03:06,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475437362] [2021-12-06 19:03:06,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:03:06,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:03:06,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:03:06,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:03:06,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:03:06,918 INFO L87 Difference]: Start difference. First operand 1161 states and 1648 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 19:03:08,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:03:11,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:03:13,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:03:16,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:03:16,982 INFO L93 Difference]: Finished difference Result 1415 states and 2064 transitions. [2021-12-06 19:03:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:03:16,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 79 [2021-12-06 19:03:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:03:16,987 INFO L225 Difference]: With dead ends: 1415 [2021-12-06 19:03:16,987 INFO L226 Difference]: Without dead ends: 1380 [2021-12-06 19:03:16,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:03:16,988 INFO L933 BasicCegarLoop]: 1478 mSDtfsCounter, 3060 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 1459 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3175 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1459 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:03:16,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3175 Valid, 1991 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1459 Valid, 1095 Invalid, 3 Unknown, 0 Unchecked, 9.8s Time] [2021-12-06 19:03:16,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-12-06 19:03:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1128. [2021-12-06 19:03:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 772 states have (on average 1.3354922279792747) internal successors, (1031), 797 states have internal predecessors, (1031), 291 states have call successors, (291), 65 states have call predecessors, (291), 64 states have return successors, (290), 287 states have call predecessors, (290), 290 states have call successors, (290) [2021-12-06 19:03:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1612 transitions. [2021-12-06 19:03:17,063 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1612 transitions. Word has length 79 [2021-12-06 19:03:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:03:17,064 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1612 transitions. [2021-12-06 19:03:17,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 19:03:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1612 transitions. [2021-12-06 19:03:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 19:03:17,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:03:17,065 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 19:03:17,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 19:03:17,065 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:03:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:03:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1039755587, now seen corresponding path program 1 times [2021-12-06 19:03:17,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:03:17,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664565557] [2021-12-06 19:03:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:03:17,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:03:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:17,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:03:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:17,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:03:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:17,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 19:03:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:17,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:03:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:17,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 19:03:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:17,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 19:03:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:17,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 19:03:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:17,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 19:03:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:03:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 19:03:17,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:03:17,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664565557] [2021-12-06 19:03:17,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664565557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:03:17,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:03:17,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:03:17,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025522924] [2021-12-06 19:03:17,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:03:17,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:03:17,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:03:17,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:03:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:03:17,219 INFO L87 Difference]: Start difference. First operand 1128 states and 1612 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:03:19,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:03:21,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:03:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:03:23,167 INFO L93 Difference]: Finished difference Result 1380 states and 2027 transitions. [2021-12-06 19:03:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:03:23,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2021-12-06 19:03:23,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:03:23,168 INFO L225 Difference]: With dead ends: 1380 [2021-12-06 19:03:23,168 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 19:03:23,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:03:23,173 INFO L933 BasicCegarLoop]: 1814 mSDtfsCounter, 1893 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 562 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2093 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:03:23,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2093 Valid, 2543 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 398 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2021-12-06 19:03:23,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 19:03:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 19:03:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:03:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 19:03:23,174 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2021-12-06 19:03:23,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:03:23,174 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 19:03:23,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:03:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 19:03:23,174 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 19:03:23,176 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 19:03:23,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 19:03:23,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-06 19:03:49,103 WARN L227 SmtUtils]: Spent 25.80s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:04:14,946 WARN L227 SmtUtils]: Spent 25.84s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:04:40,612 WARN L227 SmtUtils]: Spent 25.62s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:05:06,193 WARN L227 SmtUtils]: Spent 25.58s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:05:31,756 WARN L227 SmtUtils]: Spent 25.54s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:05:57,319 WARN L227 SmtUtils]: Spent 25.56s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:06:22,905 WARN L227 SmtUtils]: Spent 25.56s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:06:48,462 WARN L227 SmtUtils]: Spent 25.55s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:07:14,033 WARN L227 SmtUtils]: Spent 25.56s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:07:39,614 WARN L227 SmtUtils]: Spent 25.58s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:08:05,234 WARN L227 SmtUtils]: Spent 25.61s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:08:30,829 WARN L227 SmtUtils]: Spent 25.57s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:08:56,426 WARN L227 SmtUtils]: Spent 25.59s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:09:22,025 WARN L227 SmtUtils]: Spent 25.58s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:09:47,578 WARN L227 SmtUtils]: Spent 25.55s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:10:13,365 WARN L227 SmtUtils]: Spent 25.79s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:10:38,987 WARN L227 SmtUtils]: Spent 25.62s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:11:04,608 WARN L227 SmtUtils]: Spent 25.58s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:11:30,435 WARN L227 SmtUtils]: Spent 25.82s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:11:56,104 WARN L227 SmtUtils]: Spent 25.62s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:12:21,733 WARN L227 SmtUtils]: Spent 25.63s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:12:47,353 WARN L227 SmtUtils]: Spent 25.62s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:13:13,009 WARN L227 SmtUtils]: Spent 25.65s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:13:38,732 WARN L227 SmtUtils]: Spent 25.69s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 19:14:04,291 WARN L227 SmtUtils]: Spent 25.56s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)