./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-1.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_52722b2a-fe40-424b-9fae-c525e795f3c3/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/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_52722b2a-fe40-424b-9fae-c525e795f3c3/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/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_52722b2a-fe40-424b-9fae-c525e795f3c3/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 cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:47:02,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:47:02,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:47:02,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:47:02,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:47:02,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:47:02,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:47:02,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:47:02,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:47:02,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:47:02,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:47:02,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:47:02,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:47:02,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:47:02,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:47:02,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:47:02,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:47:02,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:47:02,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:47:02,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:47:02,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:47:02,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:47:02,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:47:02,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:47:02,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:47:02,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:47:02,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:47:02,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:47:02,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:47:02,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:47:02,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:47:02,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:47:02,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:47:02,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:47:02,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:47:02,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:47:02,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:47:02,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:47:02,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:47:02,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:47:02,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:47:02,314 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 17:47:02,337 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:47:02,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:47:02,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:47:02,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:47:02,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:47:02,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:47:02,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:47:02,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:47:02,340 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:47:02,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:47:02,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:47:02,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:47:02,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:47:02,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:47:02,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:47:02,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:47:02,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:47:02,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:47:02,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:47:02,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:47:02,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:47:02,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:47:02,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:47:02,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:47:02,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:47:02,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:47:02,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:47:02,343 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:47:02,343 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:47:02,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:47:02,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:47:02,344 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_52722b2a-fe40-424b-9fae-c525e795f3c3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 [2021-12-06 17:47:02,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:47:02,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:47:02,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:47:02,556 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:47:02,557 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:47:02,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2021-12-06 17:47:02,609 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/bin/uautomizer-DrprNOufMa/data/ae5eb3979/f5fee66df543403796e352680f5e161a/FLAGaf4791c50 [2021-12-06 17:47:03,188 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:47:03,188 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2021-12-06 17:47:03,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/bin/uautomizer-DrprNOufMa/data/ae5eb3979/f5fee66df543403796e352680f5e161a/FLAGaf4791c50 [2021-12-06 17:47:03,589 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/bin/uautomizer-DrprNOufMa/data/ae5eb3979/f5fee66df543403796e352680f5e161a [2021-12-06 17:47:03,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:47:03,595 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:47:03,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:47:03,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:47:03,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:47:03,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:47:03" (1/1) ... [2021-12-06 17:47:03,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29476546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:03, skipping insertion in model container [2021-12-06 17:47:03,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:47:03" (1/1) ... [2021-12-06 17:47:03,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:47:03,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:47:04,465 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_52722b2a-fe40-424b-9fae-c525e795f3c3/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2021-12-06 17:47:04,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:47:04,522 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:47:04,697 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_52722b2a-fe40-424b-9fae-c525e795f3c3/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2021-12-06 17:47:04,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:47:04,760 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:47:04,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:04 WrapperNode [2021-12-06 17:47:04,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:47:04,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:47:04,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:47:04,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:47:04,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:04" (1/1) ... [2021-12-06 17:47:04,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:04" (1/1) ... [2021-12-06 17:47:04,939 INFO L137 Inliner]: procedures = 191, calls = 1267, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3340 [2021-12-06 17:47:04,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:47:04,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:47:04,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:47:04,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:47:04,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:04" (1/1) ... [2021-12-06 17:47:04,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:04" (1/1) ... [2021-12-06 17:47:04,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:04" (1/1) ... [2021-12-06 17:47:04,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:04" (1/1) ... [2021-12-06 17:47:05,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:04" (1/1) ... [2021-12-06 17:47:05,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:04" (1/1) ... [2021-12-06 17:47:05,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:04" (1/1) ... [2021-12-06 17:47:05,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:47:05,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:47:05,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:47:05,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:47:05,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:04" (1/1) ... [2021-12-06 17:47:05,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:47:05,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:47:05,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:47:05,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52722b2a-fe40-424b-9fae-c525e795f3c3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:47:05,100 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-12-06 17:47:05,100 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-12-06 17:47:05,100 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-06 17:47:05,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-12-06 17:47:05,100 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-12-06 17:47:05,100 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-12-06 17:47:05,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-06 17:47:05,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-06 17:47:05,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-06 17:47:05,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:47:05,101 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-12-06 17:47:05,101 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-12-06 17:47:05,101 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-12-06 17:47:05,101 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-12-06 17:47:05,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-06 17:47:05,101 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-06 17:47:05,101 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-12-06 17:47:05,101 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-12-06 17:47:05,101 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-12-06 17:47:05,101 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-12-06 17:47:05,101 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-06 17:47:05,101 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-06 17:47:05,102 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-06 17:47:05,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-06 17:47:05,102 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-12-06 17:47:05,102 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-12-06 17:47:05,102 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2021-12-06 17:47:05,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2021-12-06 17:47:05,102 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-12-06 17:47:05,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-12-06 17:47:05,102 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-06 17:47:05,102 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-06 17:47:05,102 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-12-06 17:47:05,102 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-12-06 17:47:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-12-06 17:47:05,103 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-12-06 17:47:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-12-06 17:47:05,103 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-12-06 17:47:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:47:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-06 17:47:05,103 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-06 17:47:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-06 17:47:05,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-06 17:47:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-12-06 17:47:05,103 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-12-06 17:47:05,103 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-12-06 17:47:05,104 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-12-06 17:47:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-12-06 17:47:05,104 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-12-06 17:47:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-12-06 17:47:05,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-12-06 17:47:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-06 17:47:05,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-06 17:47:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-12-06 17:47:05,104 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-12-06 17:47:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 17:47:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-12-06 17:47:05,104 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-12-06 17:47:05,105 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-12-06 17:47:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-12-06 17:47:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-06 17:47:05,105 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-06 17:47:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-12-06 17:47:05,105 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-12-06 17:47:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-06 17:47:05,105 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-06 17:47:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:47:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-12-06 17:47:05,105 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-12-06 17:47:05,105 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-12-06 17:47:05,106 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-12-06 17:47:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:47:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 17:47:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-06 17:47:05,106 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-06 17:47:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-06 17:47:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-12-06 17:47:05,106 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-12-06 17:47:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-12-06 17:47:05,106 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-12-06 17:47:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 17:47:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-12-06 17:47:05,107 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-12-06 17:47:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-12-06 17:47:05,107 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-12-06 17:47:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-12-06 17:47:05,107 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-12-06 17:47:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-12-06 17:47:05,107 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-12-06 17:47:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-12-06 17:47:05,107 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-12-06 17:47:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-12-06 17:47:05,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-12-06 17:47:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-12-06 17:47:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-12-06 17:47:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-06 17:47:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-06 17:47:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-06 17:47:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-06 17:47:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-12-06 17:47:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-12-06 17:47:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:47:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 17:47:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-12-06 17:47:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-12-06 17:47:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-06 17:47:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-06 17:47:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-12-06 17:47:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-12-06 17:47:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-06 17:47:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-06 17:47:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-12-06 17:47:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-12-06 17:47:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-12-06 17:47:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-12-06 17:47:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-12-06 17:47:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-12-06 17:47:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-06 17:47:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-06 17:47:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-06 17:47:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-06 17:47:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-12-06 17:47:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-12-06 17:47:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-12-06 17:47:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-12-06 17:47:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-06 17:47:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-12-06 17:47:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-06 17:47:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-06 17:47:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-12-06 17:47:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-12-06 17:47:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-06 17:47:05,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-06 17:47:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-12-06 17:47:05,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-12-06 17:47:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:47:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-12-06 17:47:05,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-12-06 17:47:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-12-06 17:47:05,111 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-12-06 17:47:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-06 17:47:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-06 17:47:05,111 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-06 17:47:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-12-06 17:47:05,111 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-12-06 17:47:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:47:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:47:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-12-06 17:47:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-12-06 17:47:05,487 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:47:05,489 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:47:19,602 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:47:19,625 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:47:19,625 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 17:47:19,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:47:19 BoogieIcfgContainer [2021-12-06 17:47:19,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:47:19,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:47:19,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:47:19,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:47:19,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:47:03" (1/3) ... [2021-12-06 17:47:19,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230d9d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:47:19, skipping insertion in model container [2021-12-06 17:47:19,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:47:04" (2/3) ... [2021-12-06 17:47:19,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230d9d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:47:19, skipping insertion in model container [2021-12-06 17:47:19,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:47:19" (3/3) ... [2021-12-06 17:47:19,638 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2021-12-06 17:47:19,643 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:47:19,643 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:47:19,689 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:47:19,694 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 17:47:19,695 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:47:19,735 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 17:47:19,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 17:47:19,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:47:19,739 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 17:47:19,739 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:47:19,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:47:19,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1560528525, now seen corresponding path program 1 times [2021-12-06 17:47:19,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:47:19,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910493494] [2021-12-06 17:47:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:47:19,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:47:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:20,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:20,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:47:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:20,201 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 17:47:20,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:47:20,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910493494] [2021-12-06 17:47:20,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910493494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:47:20,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:47:20,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:47:20,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530182574] [2021-12-06 17:47:20,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:47:20,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:47:20,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:47:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:47:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:47:20,232 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 17:47:22,275 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 17:47:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:47:25,717 INFO L93 Difference]: Finished difference Result 3954 states and 5954 transitions. [2021-12-06 17:47:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:47:25,719 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 17:47:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:47:25,758 INFO L225 Difference]: With dead ends: 3954 [2021-12-06 17:47:25,758 INFO L226 Difference]: Without dead ends: 2729 [2021-12-06 17:47:25,771 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 17:47:25,775 INFO L933 BasicCegarLoop]: 2078 mSDtfsCounter, 2721 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 912 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3016 SdHoareTripleChecker+Valid, 4332 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:47:25,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3016 Valid, 4332 Invalid, 2031 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [912 Valid, 1118 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-12-06 17:47:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-12-06 17:47:25,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2224. [2021-12-06 17:47:25,930 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 17:47:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3222 transitions. [2021-12-06 17:47:25,947 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3222 transitions. Word has length 17 [2021-12-06 17:47:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:47:25,947 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3222 transitions. [2021-12-06 17:47:25,947 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 17:47:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3222 transitions. [2021-12-06 17:47:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:47:25,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:47:25,949 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 17:47:25,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:47:25,949 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:47:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:47:25,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1132781344, now seen corresponding path program 1 times [2021-12-06 17:47:25,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:47:25,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270177093] [2021-12-06 17:47:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:47:25,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:47:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:26,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:26,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:47:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:26,136 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 17:47:26,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:47:26,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270177093] [2021-12-06 17:47:26,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270177093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:47:26,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:47:26,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:47:26,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313998720] [2021-12-06 17:47:26,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:47:26,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:47:26,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:47:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:47:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:47:26,138 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 17:47:28,169 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 17:47:32,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:47:32,037 INFO L93 Difference]: Finished difference Result 6504 states and 9632 transitions. [2021-12-06 17:47:32,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:47:32,038 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 17:47:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:47:32,074 INFO L225 Difference]: With dead ends: 6504 [2021-12-06 17:47:32,074 INFO L226 Difference]: Without dead ends: 5418 [2021-12-06 17:47:32,081 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 17:47:32,082 INFO L933 BasicCegarLoop]: 2799 mSDtfsCounter, 2384 mSDsluCounter, 2583 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 791 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2677 SdHoareTripleChecker+Valid, 5382 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:47:32,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2677 Valid, 5382 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 1137 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-12-06 17:47:32,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-12-06 17:47:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4408. [2021-12-06 17:47:32,264 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 17:47:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6390 transitions. [2021-12-06 17:47:32,285 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6390 transitions. Word has length 18 [2021-12-06 17:47:32,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:47:32,286 INFO L470 AbstractCegarLoop]: Abstraction has 4408 states and 6390 transitions. [2021-12-06 17:47:32,286 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 17:47:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6390 transitions. [2021-12-06 17:47:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:47:32,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:47:32,287 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 17:47:32,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:47:32,287 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:47:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:47:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1342676608, now seen corresponding path program 1 times [2021-12-06 17:47:32,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:47:32,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384603255] [2021-12-06 17:47:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:47:32,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:47:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:47:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 17:47:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:47:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:32,495 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 17:47:32,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:47:32,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384603255] [2021-12-06 17:47:32,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384603255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:47:32,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:47:32,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:47:32,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701486283] [2021-12-06 17:47:32,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:47:32,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:47:32,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:47:32,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:47:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:47:32,497 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 17:47:34,527 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 17:47:37,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:47:37,911 INFO L93 Difference]: Finished difference Result 11851 states and 17589 transitions. [2021-12-06 17:47:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:47:37,912 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 17:47:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:47:37,974 INFO L225 Difference]: With dead ends: 11851 [2021-12-06 17:47:37,974 INFO L226 Difference]: Without dead ends: 10750 [2021-12-06 17:47:37,984 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 17:47:37,986 INFO L933 BasicCegarLoop]: 2261 mSDtfsCounter, 2626 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 903 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2916 SdHoareTripleChecker+Valid, 4416 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:47:37,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2916 Valid, 4416 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 1131 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-12-06 17:47:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-12-06 17:47:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 7676. [2021-12-06 17:47:38,310 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 17:47:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 11129 transitions. [2021-12-06 17:47:38,342 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 11129 transitions. Word has length 36 [2021-12-06 17:47:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:47:38,342 INFO L470 AbstractCegarLoop]: Abstraction has 7676 states and 11129 transitions. [2021-12-06 17:47:38,342 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 17:47:38,342 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 11129 transitions. [2021-12-06 17:47:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 17:47:38,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:47:38,344 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 17:47:38,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:47:38,344 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:47:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:47:38,345 INFO L85 PathProgramCache]: Analyzing trace with hash 2327976, now seen corresponding path program 1 times [2021-12-06 17:47:38,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:47:38,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508078026] [2021-12-06 17:47:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:47:38,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:47:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:38,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:47:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:38,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:47:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:38,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 17:47:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:39,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:47:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:47:39,207 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 17:47:39,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:47:39,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508078026] [2021-12-06 17:47:39,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508078026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:47:39,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:47:39,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 17:47:39,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603660253] [2021-12-06 17:47:39,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:47:39,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:47:39,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:47:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:47:39,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:47:39,210 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 17:47:41,244 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 17:47:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:47:59,563 INFO L93 Difference]: Finished difference Result 22061 states and 32715 transitions. [2021-12-06 17:47:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:47:59,563 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 17:47:59,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:47:59,639 INFO L225 Difference]: With dead ends: 22061 [2021-12-06 17:47:59,639 INFO L226 Difference]: Without dead ends: 16650 [2021-12-06 17:47:59,659 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 17:47:59,659 INFO L933 BasicCegarLoop]: 2614 mSDtfsCounter, 3303 mSDsluCounter, 24832 mSDsCounter, 0 mSdLazyCounter, 8542 mSolverCounterSat, 1477 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3600 SdHoareTripleChecker+Valid, 27446 SdHoareTripleChecker+Invalid, 10020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1477 IncrementalHoareTripleChecker+Valid, 8542 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:47:59,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3600 Valid, 27446 Invalid, 10020 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1477 Valid, 8542 Invalid, 1 Unknown, 0 Unchecked, 18.9s Time] [2021-12-06 17:47:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16650 states. [2021-12-06 17:48:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16650 to 10978. [2021-12-06 17:48:00,094 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 17:48:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10978 states to 10978 states and 15913 transitions. [2021-12-06 17:48:00,126 INFO L78 Accepts]: Start accepts. Automaton has 10978 states and 15913 transitions. Word has length 38 [2021-12-06 17:48:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:00,126 INFO L470 AbstractCegarLoop]: Abstraction has 10978 states and 15913 transitions. [2021-12-06 17:48:00,127 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 17:48:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 10978 states and 15913 transitions. [2021-12-06 17:48:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 17:48:00,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:00,128 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 17:48:00,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:48:00,129 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:00,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1064452566, now seen corresponding path program 1 times [2021-12-06 17:48:00,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:00,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054899119] [2021-12-06 17:48:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:00,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:00,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:00,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:48:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:00,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:48:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:00,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 17:48:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:01,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:48:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:01,321 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 17:48:01,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054899119] [2021-12-06 17:48:01,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054899119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:01,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:01,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 17:48:01,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745122279] [2021-12-06 17:48:01,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:01,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:48:01,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:48:01,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:48:01,323 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 17:48:03,357 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 17:48:26,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:26,032 INFO L93 Difference]: Finished difference Result 17437 states and 25948 transitions. [2021-12-06 17:48:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 17:48:26,033 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 17:48:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:26,102 INFO L225 Difference]: With dead ends: 17437 [2021-12-06 17:48:26,102 INFO L226 Difference]: Without dead ends: 16373 [2021-12-06 17:48:26,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 17:48:26,110 INFO L933 BasicCegarLoop]: 2294 mSDtfsCounter, 3981 mSDsluCounter, 23524 mSDsCounter, 0 mSdLazyCounter, 9539 mSolverCounterSat, 1829 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4268 SdHoareTripleChecker+Valid, 25818 SdHoareTripleChecker+Invalid, 11369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1829 IncrementalHoareTripleChecker+Valid, 9539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:26,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4268 Valid, 25818 Invalid, 11369 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1829 Valid, 9539 Invalid, 1 Unknown, 0 Unchecked, 22.8s Time] [2021-12-06 17:48:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16373 states. [2021-12-06 17:48:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16373 to 9922. [2021-12-06 17:48:26,509 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 17:48:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9922 states to 9922 states and 14368 transitions. [2021-12-06 17:48:26,537 INFO L78 Accepts]: Start accepts. Automaton has 9922 states and 14368 transitions. Word has length 45 [2021-12-06 17:48:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:26,537 INFO L470 AbstractCegarLoop]: Abstraction has 9922 states and 14368 transitions. [2021-12-06 17:48:26,537 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 17:48:26,538 INFO L276 IsEmpty]: Start isEmpty. Operand 9922 states and 14368 transitions. [2021-12-06 17:48:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:48:26,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:26,539 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 17:48:26,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:48:26,540 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:26,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:26,540 INFO L85 PathProgramCache]: Analyzing trace with hash 575821089, now seen corresponding path program 1 times [2021-12-06 17:48:26,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:26,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879366487] [2021-12-06 17:48:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:26,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:26,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:26,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:48:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:26,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 17:48:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:26,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:48:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:26,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 17:48:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:26,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 17:48:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:26,763 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 17:48:26,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:26,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879366487] [2021-12-06 17:48:26,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879366487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:26,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:26,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:48:26,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155070862] [2021-12-06 17:48:26,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:26,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:48:26,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:26,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:48:26,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:48:26,765 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 17:48:28,791 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 17:48:30,829 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 17:48:35,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:35,189 INFO L93 Difference]: Finished difference Result 14804 states and 22011 transitions. [2021-12-06 17:48:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:48:35,189 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 17:48:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:35,247 INFO L225 Difference]: With dead ends: 14804 [2021-12-06 17:48:35,247 INFO L226 Difference]: Without dead ends: 14783 [2021-12-06 17:48:35,255 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 17:48:35,256 INFO L933 BasicCegarLoop]: 3342 mSDtfsCounter, 2019 mSDsluCounter, 2643 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 669 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2303 SdHoareTripleChecker+Valid, 5985 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:35,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2303 Valid, 5985 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [669 Valid, 1145 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2021-12-06 17:48:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14783 states. [2021-12-06 17:48:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14783 to 7766. [2021-12-06 17:48:35,621 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 17:48:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 11227 transitions. [2021-12-06 17:48:35,641 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 11227 transitions. Word has length 52 [2021-12-06 17:48:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:35,641 INFO L470 AbstractCegarLoop]: Abstraction has 7766 states and 11227 transitions. [2021-12-06 17:48:35,641 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 17:48:35,642 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 11227 transitions. [2021-12-06 17:48:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 17:48:35,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:35,643 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 17:48:35,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:48:35,643 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:35,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1749749551, now seen corresponding path program 1 times [2021-12-06 17:48:35,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:35,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860464030] [2021-12-06 17:48:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:35,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:48:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:48:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:48:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 17:48:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:48:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 17:48:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 17:48:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,311 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 17:48:36,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:36,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860464030] [2021-12-06 17:48:36,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860464030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:36,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:36,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 17:48:36,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679304891] [2021-12-06 17:48:36,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:36,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:48:36,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:36,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:48:36,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:48:36,313 INFO L87 Difference]: Start difference. First operand 7766 states and 11227 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:48:38,342 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 17:48:40,389 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 17:49:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:03,857 INFO L93 Difference]: Finished difference Result 13204 states and 19584 transitions. [2021-12-06 17:49:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:49:03,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2021-12-06 17:49:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:03,889 INFO L225 Difference]: With dead ends: 13204 [2021-12-06 17:49:03,889 INFO L226 Difference]: Without dead ends: 12143 [2021-12-06 17:49:03,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-12-06 17:49:03,896 INFO L933 BasicCegarLoop]: 3050 mSDtfsCounter, 2876 mSDsluCounter, 26315 mSDsCounter, 0 mSdLazyCounter, 10140 mSolverCounterSat, 1156 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3171 SdHoareTripleChecker+Valid, 29365 SdHoareTripleChecker+Invalid, 11298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1156 IncrementalHoareTripleChecker+Valid, 10140 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:03,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3171 Valid, 29365 Invalid, 11298 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1156 Valid, 10140 Invalid, 2 Unknown, 0 Unchecked, 25.9s Time] [2021-12-06 17:49:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12143 states. [2021-12-06 17:49:04,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12143 to 7764. [2021-12-06 17:49:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7764 states, 5288 states have (on average 1.350605143721634) internal successors, (7142), 5480 states have internal predecessors, (7142), 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 17:49:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7764 states to 7764 states and 11224 transitions. [2021-12-06 17:49:04,273 INFO L78 Accepts]: Start accepts. Automaton has 7764 states and 11224 transitions. Word has length 53 [2021-12-06 17:49:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:04,273 INFO L470 AbstractCegarLoop]: Abstraction has 7764 states and 11224 transitions. [2021-12-06 17:49:04,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:49:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 7764 states and 11224 transitions. [2021-12-06 17:49:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 17:49:04,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:04,274 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:04,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:49:04,275 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:04,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:04,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2011689375, now seen corresponding path program 1 times [2021-12-06 17:49:04,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:04,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141670617] [2021-12-06 17:49:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:04,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:04,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:04,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:49:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:04,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:49:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:04,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 17:49:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:04,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:49:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:05,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-06 17:49:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:05,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 17:49:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:05,096 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 17:49:05,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:05,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141670617] [2021-12-06 17:49:05,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141670617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:05,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:05,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 17:49:05,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022976119] [2021-12-06 17:49:05,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:05,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:49:05,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:05,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:49:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:49:05,098 INFO L87 Difference]: Start difference. First operand 7764 states and 11224 transitions. Second operand has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 17:49:07,133 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 17:49:09,198 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 17:49:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:22,807 INFO L93 Difference]: Finished difference Result 11151 states and 16394 transitions. [2021-12-06 17:49:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:49:22,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 56 [2021-12-06 17:49:22,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:22,831 INFO L225 Difference]: With dead ends: 11151 [2021-12-06 17:49:22,831 INFO L226 Difference]: Without dead ends: 6792 [2021-12-06 17:49:22,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-12-06 17:49:22,846 INFO L933 BasicCegarLoop]: 1859 mSDtfsCounter, 889 mSDsluCounter, 20618 mSDsCounter, 0 mSdLazyCounter, 5720 mSolverCounterSat, 344 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 22477 SdHoareTripleChecker+Invalid, 6066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 5720 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:22,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 22477 Invalid, 6066 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [344 Valid, 5720 Invalid, 2 Unknown, 0 Unchecked, 16.2s Time] [2021-12-06 17:49:22,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6792 states. [2021-12-06 17:49:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6792 to 5544. [2021-12-06 17:49:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5544 states, 3773 states have (on average 1.3501192684866155) internal successors, (5094), 3908 states have internal predecessors, (5094), 1462 states have call successors, (1462), 313 states have call predecessors, (1462), 308 states have return successors, (1458), 1432 states have call predecessors, (1458), 1455 states have call successors, (1458) [2021-12-06 17:49:23,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5544 states to 5544 states and 8014 transitions. [2021-12-06 17:49:23,152 INFO L78 Accepts]: Start accepts. Automaton has 5544 states and 8014 transitions. Word has length 56 [2021-12-06 17:49:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:23,153 INFO L470 AbstractCegarLoop]: Abstraction has 5544 states and 8014 transitions. [2021-12-06 17:49:23,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 17:49:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5544 states and 8014 transitions. [2021-12-06 17:49:23,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:49:23,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:23,154 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 17:49:23,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:49:23,154 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:23,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:23,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1357667059, now seen corresponding path program 1 times [2021-12-06 17:49:23,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:23,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814763715] [2021-12-06 17:49:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:23,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:23,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:23,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:49:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:23,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 17:49:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:23,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:49:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:23,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 17:49:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:23,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 17:49:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:23,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 17:49:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:23,416 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 17:49:23,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:23,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814763715] [2021-12-06 17:49:23,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814763715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:23,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:23,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:49:23,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81829745] [2021-12-06 17:49:23,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:23,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:49:23,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:23,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:49:23,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:49:23,418 INFO L87 Difference]: Start difference. First operand 5544 states and 8014 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 17:49:25,447 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 17:49:27,464 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 17:49:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:42,427 INFO L93 Difference]: Finished difference Result 8917 states and 13364 transitions. [2021-12-06 17:49:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:49:42,427 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 17:49:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:42,449 INFO L225 Difference]: With dead ends: 8917 [2021-12-06 17:49:42,449 INFO L226 Difference]: Without dead ends: 7833 [2021-12-06 17:49:42,455 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 17:49:42,455 INFO L933 BasicCegarLoop]: 2201 mSDtfsCounter, 3138 mSDsluCounter, 5421 mSDsCounter, 0 mSdLazyCounter, 5896 mSolverCounterSat, 1814 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3374 SdHoareTripleChecker+Valid, 7622 SdHoareTripleChecker+Invalid, 7712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1814 IncrementalHoareTripleChecker+Valid, 5896 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:42,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3374 Valid, 7622 Invalid, 7712 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1814 Valid, 5896 Invalid, 2 Unknown, 0 Unchecked, 18.2s Time] [2021-12-06 17:49:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2021-12-06 17:49:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 5533. [2021-12-06 17:49:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5533 states, 3767 states have (on average 1.349880541544996) internal successors, (5085), 3900 states have internal predecessors, (5085), 1457 states have call successors, (1457), 313 states have call predecessors, (1457), 308 states have return successors, (1454), 1429 states have call predecessors, (1454), 1451 states have call successors, (1454) [2021-12-06 17:49:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5533 states to 5533 states and 7996 transitions. [2021-12-06 17:49:42,756 INFO L78 Accepts]: Start accepts. Automaton has 5533 states and 7996 transitions. Word has length 64 [2021-12-06 17:49:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:42,756 INFO L470 AbstractCegarLoop]: Abstraction has 5533 states and 7996 transitions. [2021-12-06 17:49:42,756 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 17:49:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5533 states and 7996 transitions. [2021-12-06 17:49:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 17:49:42,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:42,757 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 17:49:42,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 17:49:42,758 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:42,758 INFO L85 PathProgramCache]: Analyzing trace with hash -723478224, now seen corresponding path program 1 times [2021-12-06 17:49:42,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:42,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012824315] [2021-12-06 17:49:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:42,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:42,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:42,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:49:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:42,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 17:49:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:42,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:49:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:42,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 17:49:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:42,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 17:49:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:42,975 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 17:49:42,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:42,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012824315] [2021-12-06 17:49:42,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012824315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:42,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:42,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:49:42,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318809792] [2021-12-06 17:49:42,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:42,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:49:42,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:42,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:49:42,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:49:42,976 INFO L87 Difference]: Start difference. First operand 5533 states and 7996 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 17:49:45,002 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 17:49:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:50,835 INFO L93 Difference]: Finished difference Result 8180 states and 12119 transitions. [2021-12-06 17:49:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:49:50,836 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 17:49:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:50,850 INFO L225 Difference]: With dead ends: 8180 [2021-12-06 17:49:50,850 INFO L226 Difference]: Without dead ends: 4916 [2021-12-06 17:49:50,860 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 17:49:50,861 INFO L933 BasicCegarLoop]: 1917 mSDtfsCounter, 1621 mSDsluCounter, 6609 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 982 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1814 SdHoareTripleChecker+Valid, 8526 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 982 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:50,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1814 Valid, 8526 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [982 Valid, 2164 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2021-12-06 17:49:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4916 states. [2021-12-06 17:49:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4916 to 3391. [2021-12-06 17:49:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 2314 states have (on average 1.3414001728608471) internal successors, (3104), 2393 states have internal predecessors, (3104), 881 states have call successors, (881), 198 states have call predecessors, (881), 195 states have return successors, (879), 865 states have call predecessors, (879), 876 states have call successors, (879) [2021-12-06 17:49:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 4864 transitions. [2021-12-06 17:49:51,087 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 4864 transitions. Word has length 63 [2021-12-06 17:49:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:51,087 INFO L470 AbstractCegarLoop]: Abstraction has 3391 states and 4864 transitions. [2021-12-06 17:49:51,088 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 17:49:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 4864 transitions. [2021-12-06 17:49:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 17:49:51,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:51,088 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 17:49:51,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:49:51,089 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1127472847, now seen corresponding path program 1 times [2021-12-06 17:49:51,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:51,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067802742] [2021-12-06 17:49:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:51,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:51,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:51,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:49:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:51,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 17:49:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:51,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:49:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:51,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 17:49:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:51,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 17:49:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:51,309 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 17:49:51,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:51,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067802742] [2021-12-06 17:49:51,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067802742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:51,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:51,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:49:51,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670852537] [2021-12-06 17:49:51,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:51,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:49:51,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:51,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:49:51,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:49:51,311 INFO L87 Difference]: Start difference. First operand 3391 states and 4864 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 17:49:53,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:49:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:59,403 INFO L93 Difference]: Finished difference Result 5728 states and 8516 transitions. [2021-12-06 17:49:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:49:59,404 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 17:49:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:59,417 INFO L225 Difference]: With dead ends: 5728 [2021-12-06 17:49:59,418 INFO L226 Difference]: Without dead ends: 4665 [2021-12-06 17:49:59,422 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 17:49:59,423 INFO L933 BasicCegarLoop]: 2064 mSDtfsCounter, 1552 mSDsluCounter, 6831 mSDsCounter, 0 mSdLazyCounter, 2174 mSolverCounterSat, 962 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1748 SdHoareTripleChecker+Valid, 8895 SdHoareTripleChecker+Invalid, 3137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 962 IncrementalHoareTripleChecker+Valid, 2174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:59,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1748 Valid, 8895 Invalid, 3137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [962 Valid, 2174 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-12-06 17:49:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4665 states. [2021-12-06 17:49:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4665 to 3388. [2021-12-06 17:49:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 2311 states have (on average 1.3405452185201212) internal successors, (3098), 2390 states have internal predecessors, (3098), 881 states have call successors, (881), 198 states have call predecessors, (881), 195 states have return successors, (879), 865 states have call predecessors, (879), 876 states have call successors, (879) [2021-12-06 17:49:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 4858 transitions. [2021-12-06 17:49:59,646 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 4858 transitions. Word has length 66 [2021-12-06 17:49:59,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:59,647 INFO L470 AbstractCegarLoop]: Abstraction has 3388 states and 4858 transitions. [2021-12-06 17:49:59,647 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 17:49:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 4858 transitions. [2021-12-06 17:49:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 17:49:59,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:59,648 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 17:49:59,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 17:49:59,648 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:59,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:59,648 INFO L85 PathProgramCache]: Analyzing trace with hash -964928150, now seen corresponding path program 1 times [2021-12-06 17:49:59,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:59,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388056507] [2021-12-06 17:49:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:59,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:59,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:49:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:59,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:49:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:59,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 17:49:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:59,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:49:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:59,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 17:49:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:59,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 17:49:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:59,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 17:49:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:59,851 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 17:49:59,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:59,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388056507] [2021-12-06 17:49:59,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388056507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:59,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:59,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:49:59,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138106144] [2021-12-06 17:49:59,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:59,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:49:59,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:59,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:49:59,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:49:59,853 INFO L87 Difference]: Start difference. First operand 3388 states and 4858 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 17:50:01,887 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 17:50:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:07,163 INFO L93 Difference]: Finished difference Result 6286 states and 9212 transitions. [2021-12-06 17:50:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:50:07,163 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 17:50:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:07,175 INFO L225 Difference]: With dead ends: 6286 [2021-12-06 17:50:07,175 INFO L226 Difference]: Without dead ends: 4124 [2021-12-06 17:50:07,182 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 17:50:07,183 INFO L933 BasicCegarLoop]: 2025 mSDtfsCounter, 1514 mSDsluCounter, 6525 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 812 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 8550 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 812 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:07,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1592 Valid, 8550 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [812 Valid, 2056 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2021-12-06 17:50:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2021-12-06 17:50:07,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 3369. [2021-12-06 17:50:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 2299 states have (on average 1.3405828621139626) internal successors, (3082), 2377 states have internal predecessors, (3082), 876 states have call successors, (876), 194 states have call predecessors, (876), 193 states have return successors, (875), 863 states have call predecessors, (875), 872 states have call successors, (875) [2021-12-06 17:50:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 4833 transitions. [2021-12-06 17:50:07,402 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 4833 transitions. Word has length 69 [2021-12-06 17:50:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:07,403 INFO L470 AbstractCegarLoop]: Abstraction has 3369 states and 4833 transitions. [2021-12-06 17:50:07,403 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 17:50:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 4833 transitions. [2021-12-06 17:50:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 17:50:07,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:07,404 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 17:50:07,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 17:50:07,404 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2888052, now seen corresponding path program 1 times [2021-12-06 17:50:07,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:07,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365152527] [2021-12-06 17:50:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:07,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:50:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 17:50:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:50:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 17:50:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 17:50:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:07,654 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 17:50:07,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:07,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365152527] [2021-12-06 17:50:07,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365152527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:07,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:07,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:50:07,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118991631] [2021-12-06 17:50:07,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:07,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:50:07,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:07,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:50:07,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:50:07,655 INFO L87 Difference]: Start difference. First operand 3369 states and 4833 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 17:50:09,684 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 17:50:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:16,364 INFO L93 Difference]: Finished difference Result 4120 states and 6071 transitions. [2021-12-06 17:50:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:50:16,365 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 17:50:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:16,377 INFO L225 Difference]: With dead ends: 4120 [2021-12-06 17:50:16,377 INFO L226 Difference]: Without dead ends: 4115 [2021-12-06 17:50:16,378 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 17:50:16,379 INFO L933 BasicCegarLoop]: 2280 mSDtfsCounter, 1929 mSDsluCounter, 10581 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 1000 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2118 SdHoareTripleChecker+Valid, 12861 SdHoareTripleChecker+Invalid, 3842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1000 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:16,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2118 Valid, 12861 Invalid, 3842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1000 Valid, 2841 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2021-12-06 17:50:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2021-12-06 17:50:16,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 3366. [2021-12-06 17:50:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 2297 states have (on average 1.3404440574662604) internal successors, (3079), 2374 states have internal predecessors, (3079), 875 states have call successors, (875), 194 states have call predecessors, (875), 193 states have return successors, (875), 863 states have call predecessors, (875), 872 states have call successors, (875) [2021-12-06 17:50:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4829 transitions. [2021-12-06 17:50:16,594 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4829 transitions. Word has length 68 [2021-12-06 17:50:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:16,595 INFO L470 AbstractCegarLoop]: Abstraction has 3366 states and 4829 transitions. [2021-12-06 17:50:16,595 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 17:50:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4829 transitions. [2021-12-06 17:50:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 17:50:16,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:16,596 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 17:50:16,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 17:50:16,596 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:16,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1229122377, now seen corresponding path program 1 times [2021-12-06 17:50:16,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:16,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567102440] [2021-12-06 17:50:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:16,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:16,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:16,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:50:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:16,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 17:50:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:16,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:50:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:16,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 17:50:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:16,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 17:50:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:16,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 17:50:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:16,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 17:50:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:16,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 17:50:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:16,888 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 17:50:16,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:16,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567102440] [2021-12-06 17:50:16,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567102440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:16,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:16,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 17:50:16,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25440712] [2021-12-06 17:50:16,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:16,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:50:16,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:50:16,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:50:16,889 INFO L87 Difference]: Start difference. First operand 3366 states and 4829 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 17:50:18,917 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 17:50:20,946 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 17:50:38,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:38,140 INFO L93 Difference]: Finished difference Result 3638 states and 5261 transitions. [2021-12-06 17:50:38,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:50:38,141 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 17:50:38,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:38,145 INFO L225 Difference]: With dead ends: 3638 [2021-12-06 17:50:38,145 INFO L226 Difference]: Without dead ends: 1480 [2021-12-06 17:50:38,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:50:38,151 INFO L933 BasicCegarLoop]: 1527 mSDtfsCounter, 1664 mSDsluCounter, 4614 mSDsCounter, 0 mSdLazyCounter, 7506 mSolverCounterSat, 850 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1789 SdHoareTripleChecker+Valid, 6141 SdHoareTripleChecker+Invalid, 8358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 7506 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:38,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1789 Valid, 6141 Invalid, 8358 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [850 Valid, 7506 Invalid, 2 Unknown, 0 Unchecked, 20.7s Time] [2021-12-06 17:50:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-12-06 17:50:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1161. [2021-12-06 17:50:38,225 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 17:50:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1648 transitions. [2021-12-06 17:50:38,228 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1648 transitions. Word has length 71 [2021-12-06 17:50:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:38,228 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1648 transitions. [2021-12-06 17:50:38,228 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 17:50:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1648 transitions. [2021-12-06 17:50:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 17:50:38,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:38,229 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 17:50:38,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 17:50:38,229 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash -78799712, now seen corresponding path program 1 times [2021-12-06 17:50:38,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:38,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333106126] [2021-12-06 17:50:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:38,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:38,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:38,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:50:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:38,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 17:50:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:38,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:50:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:38,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 17:50:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:38,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 17:50:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:38,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 17:50:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:38,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 17:50:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:38,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 17:50:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:38,392 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 17:50:38,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333106126] [2021-12-06 17:50:38,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333106126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:38,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:38,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:50:38,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507360056] [2021-12-06 17:50:38,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:38,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:50:38,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:50:38,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:50:38,393 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 17:50:40,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:50:42,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:50:44,481 WARN L534 Checker$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 17:50:48,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:48,518 INFO L93 Difference]: Finished difference Result 1415 states and 2064 transitions. [2021-12-06 17:50:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:50:48,518 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 17:50:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:48,522 INFO L225 Difference]: With dead ends: 1415 [2021-12-06 17:50:48,522 INFO L226 Difference]: Without dead ends: 1380 [2021-12-06 17:50:48,523 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 17:50:48,523 INFO L933 BasicCegarLoop]: 1478 mSDtfsCounter, 3060 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 1459 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3175 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 2556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1459 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:48,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3175 Valid, 1991 Invalid, 2556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1459 Valid, 1094 Invalid, 3 Unknown, 0 Unchecked, 9.9s Time] [2021-12-06 17:50:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-12-06 17:50:48,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1128. [2021-12-06 17:50:48,598 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 17:50:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1612 transitions. [2021-12-06 17:50:48,601 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1612 transitions. Word has length 79 [2021-12-06 17:50:48,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:48,601 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1612 transitions. [2021-12-06 17:50:48,601 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 17:50:48,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1612 transitions. [2021-12-06 17:50:48,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 17:50:48,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:48,602 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 17:50:48,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 17:50:48,602 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:48,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:48,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1039755587, now seen corresponding path program 1 times [2021-12-06 17:50:48,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:48,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881393613] [2021-12-06 17:50:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:48,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:48,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 17:50:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:48,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 17:50:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:48,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 17:50:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:48,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:50:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:48,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 17:50:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:48,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 17:50:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:48,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 17:50:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:48,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-06 17:50:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:48,745 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 17:50:48,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:48,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881393613] [2021-12-06 17:50:48,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881393613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:48,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:48,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:50:48,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634502981] [2021-12-06 17:50:48,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:48,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:50:48,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:48,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:50:48,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:50:48,746 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 17:50:50,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:50:52,833 WARN L534 Checker$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 17:50:54,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:54,546 INFO L93 Difference]: Finished difference Result 1380 states and 2027 transitions. [2021-12-06 17:50:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:50:54,547 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 17:50:54,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:54,547 INFO L225 Difference]: With dead ends: 1380 [2021-12-06 17:50:54,547 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 17:50:54,551 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 17:50:54,551 INFO L933 BasicCegarLoop]: 1613 mSDtfsCounter, 2085 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 576 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2286 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:54,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2286 Valid, 2341 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 400 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-12-06 17:50:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 17:50:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 17:50:54,552 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 17:50:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 17:50:54,552 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2021-12-06 17:50:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:54,553 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 17:50:54,553 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 17:50:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 17:50:54,553 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 17:50:54,555 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 17:50:54,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 17:50:54,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-06 17:55:43,811 WARN L227 SmtUtils]: Spent 4.82m on a formula simplification. DAG size of input: 91 DAG size of output: 83 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 18:00:31,708 WARN L227 SmtUtils]: Spent 4.80m on a formula simplification. DAG size of input: 91 DAG size of output: 83 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)