./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 e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/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_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8 --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:47:41,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:47:41,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:47:41,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:47:41,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:47:41,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:47:41,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:47:41,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:47:41,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:47:41,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:47:41,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:47:41,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:47:41,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:47:41,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:47:41,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:47:41,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:47:41,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:47:41,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:47:41,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:47:41,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:47:41,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:47:41,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:47:41,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:47:41,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:47:41,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:47:41,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:47:41,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:47:41,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:47:41,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:47:41,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:47:41,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:47:41,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:47:41,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:47:41,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:47:41,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:47:41,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:47:41,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:47:41,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:47:41,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:47:41,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:47:41,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:47:41,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 11:47:41,620 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:47:41,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:47:41,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:47:41,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:47:41,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:47:41,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:47:41,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:47:41,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:47:41,631 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:47:41,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:47:41,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:47:41,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:47:41,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:47:41,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:47:41,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:47:41,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:47:41,635 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:47:41,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:47:41,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:47:41,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:47:41,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:47:41,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:47:41,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:47:41,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:47:41,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:47:41,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:47:41,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:47:41,638 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:47:41,638 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:47:41,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:47:41,640 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_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 [2022-11-16 11:47:41,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:47:41,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:47:41,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:47:41,990 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:47:41,990 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:47:41,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2022-11-16 11:47:42,078 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/data/66d728677/ce0db324639145d8814b280fb824b489/FLAGb18c68917 [2022-11-16 11:47:42,868 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:47:42,869 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2022-11-16 11:47:42,897 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/data/66d728677/ce0db324639145d8814b280fb824b489/FLAGb18c68917 [2022-11-16 11:47:42,971 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/data/66d728677/ce0db324639145d8814b280fb824b489 [2022-11-16 11:47:42,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:47:42,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:47:42,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:47:42,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:47:42,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:47:42,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:47:42" (1/1) ... [2022-11-16 11:47:42,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d563f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:42, skipping insertion in model container [2022-11-16 11:47:42,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:47:42" (1/1) ... [2022-11-16 11:47:42,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:47:43,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:47:44,692 WARN L229 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_f47b919a-1991-4564-944f-04aa9d210ff0/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2022-11-16 11:47:44,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:47:44,803 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:47:45,129 WARN L229 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_f47b919a-1991-4564-944f-04aa9d210ff0/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2022-11-16 11:47:45,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:47:45,287 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:47:45,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45 WrapperNode [2022-11-16 11:47:45,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:47:45,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:47:45,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:47:45,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:47:45,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45" (1/1) ... [2022-11-16 11:47:45,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45" (1/1) ... [2022-11-16 11:47:45,556 INFO L138 Inliner]: procedures = 191, calls = 1267, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3367 [2022-11-16 11:47:45,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:47:45,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:47:45,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:47:45,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:47:45,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45" (1/1) ... [2022-11-16 11:47:45,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45" (1/1) ... [2022-11-16 11:47:45,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45" (1/1) ... [2022-11-16 11:47:45,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45" (1/1) ... [2022-11-16 11:47:45,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45" (1/1) ... [2022-11-16 11:47:45,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45" (1/1) ... [2022-11-16 11:47:45,900 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45" (1/1) ... [2022-11-16 11:47:45,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45" (1/1) ... [2022-11-16 11:47:45,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:47:45,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:47:45,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:47:45,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:47:45,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45" (1/1) ... [2022-11-16 11:47:45,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:47:46,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:46,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:47:46,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f47b919a-1991-4564-944f-04aa9d210ff0/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:47:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2022-11-16 11:47:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2022-11-16 11:47:46,079 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-16 11:47:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-16 11:47:46,079 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-11-16 11:47:46,080 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-11-16 11:47:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-16 11:47:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-16 11:47:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-16 11:47:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:47:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2022-11-16 11:47:46,081 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2022-11-16 11:47:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2022-11-16 11:47:46,081 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2022-11-16 11:47:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-16 11:47:46,082 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-16 11:47:46,082 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2022-11-16 11:47:46,082 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2022-11-16 11:47:46,082 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2022-11-16 11:47:46,082 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2022-11-16 11:47:46,083 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-16 11:47:46,083 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-16 11:47:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-16 11:47:46,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-16 11:47:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2022-11-16 11:47:46,084 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2022-11-16 11:47:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2022-11-16 11:47:46,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2022-11-16 11:47:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2022-11-16 11:47:46,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2022-11-16 11:47:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-11-16 11:47:46,085 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-11-16 11:47:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2022-11-16 11:47:46,086 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2022-11-16 11:47:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2022-11-16 11:47:46,086 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2022-11-16 11:47:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-11-16 11:47:46,087 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-11-16 11:47:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:47:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-16 11:47:46,087 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-16 11:47:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-16 11:47:46,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-16 11:47:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2022-11-16 11:47:46,088 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2022-11-16 11:47:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2022-11-16 11:47:46,088 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2022-11-16 11:47:46,089 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2022-11-16 11:47:46,089 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2022-11-16 11:47:46,089 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-11-16 11:47:46,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-11-16 11:47:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-16 11:47:46,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-16 11:47:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2022-11-16 11:47:46,090 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2022-11-16 11:47:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:47:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-11-16 11:47:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2022-11-16 11:47:46,093 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2022-11-16 11:47:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-11-16 11:47:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-16 11:47:46,094 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-16 11:47:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2022-11-16 11:47:46,094 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2022-11-16 11:47:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-11-16 11:47:46,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-11-16 11:47:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:47:46,095 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2022-11-16 11:47:46,095 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2022-11-16 11:47:46,095 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2022-11-16 11:47:46,095 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2022-11-16 11:47:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:47:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 11:47:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-16 11:47:46,096 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-16 11:47:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-16 11:47:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2022-11-16 11:47:46,097 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2022-11-16 11:47:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2022-11-16 11:47:46,097 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2022-11-16 11:47:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 11:47:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-11-16 11:47:46,098 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-11-16 11:47:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2022-11-16 11:47:46,098 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2022-11-16 11:47:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2022-11-16 11:47:46,099 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2022-11-16 11:47:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-16 11:47:46,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-16 11:47:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-16 11:47:46,100 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-16 11:47:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-16 11:47:46,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-16 11:47:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-11-16 11:47:46,101 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-11-16 11:47:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-16 11:47:46,102 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-16 11:47:46,102 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-16 11:47:46,102 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-16 11:47:46,103 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2022-11-16 11:47:46,104 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2022-11-16 11:47:46,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:47:46,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 11:47:46,104 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-11-16 11:47:46,104 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-11-16 11:47:46,105 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-16 11:47:46,105 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-16 11:47:46,105 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-11-16 11:47:46,105 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-11-16 11:47:46,105 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-16 11:47:46,105 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-16 11:47:46,106 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2022-11-16 11:47:46,106 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2022-11-16 11:47:46,106 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-16 11:47:46,107 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-16 11:47:46,107 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-11-16 11:47:46,107 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-11-16 11:47:46,109 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-16 11:47:46,110 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-16 11:47:46,112 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-16 11:47:46,113 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-16 11:47:46,113 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2022-11-16 11:47:46,113 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2022-11-16 11:47:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2022-11-16 11:47:46,115 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2022-11-16 11:47:46,117 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-16 11:47:46,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-16 11:47:46,117 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-16 11:47:46,121 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-16 11:47:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2022-11-16 11:47:46,122 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2022-11-16 11:47:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-11-16 11:47:46,122 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-11-16 11:47:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2022-11-16 11:47:46,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2022-11-16 11:47:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:47:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-11-16 11:47:46,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-11-16 11:47:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-11-16 11:47:46,123 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-11-16 11:47:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-16 11:47:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-16 11:47:46,124 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-16 11:47:46,124 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-11-16 11:47:46,124 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-11-16 11:47:46,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:47:46,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:47:46,124 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-16 11:47:46,125 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-16 11:47:46,963 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:47:46,970 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:48:19,252 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:48:19,276 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:48:19,276 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 11:48:19,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:48:19 BoogieIcfgContainer [2022-11-16 11:48:19,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:48:19,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:48:19,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:48:19,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:48:19,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:47:42" (1/3) ... [2022-11-16 11:48:19,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74538c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:48:19, skipping insertion in model container [2022-11-16 11:48:19,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:47:45" (2/3) ... [2022-11-16 11:48:19,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74538c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:48:19, skipping insertion in model container [2022-11-16 11:48:19,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:48:19" (3/3) ... [2022-11-16 11:48:19,305 INFO L112 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2022-11-16 11:48:19,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:48:19,358 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:48:19,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:48:19,506 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@72e8f8ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:48:19,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:48:19,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 1233 states, 849 states have (on average 1.3875147232037692) internal successors, (1178), 889 states have internal predecessors, (1178), 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) [2022-11-16 11:48:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:48:19,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:19,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:19,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:19,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:19,538 INFO L85 PathProgramCache]: Analyzing trace with hash -285510380, now seen corresponding path program 1 times [2022-11-16 11:48:19,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:19,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885722859] [2022-11-16 11:48:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:19,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:20,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:48:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:20,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:48:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:20,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:20,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885722859] [2022-11-16 11:48:20,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885722859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:20,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:20,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:48:20,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513269522] [2022-11-16 11:48:20,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:20,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:48:20,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:20,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:48:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:48:20,781 INFO L87 Difference]: Start difference. First operand has 1233 states, 849 states have (on average 1.3875147232037692) internal successors, (1178), 889 states have internal predecessors, (1178), 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) [2022-11-16 11:48:22,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:48:31,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:31,067 INFO L93 Difference]: Finished difference Result 3972 states and 6021 transitions. [2022-11-16 11:48:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:48:31,070 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 [2022-11-16 11:48:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:31,125 INFO L225 Difference]: With dead ends: 3972 [2022-11-16 11:48:31,125 INFO L226 Difference]: Without dead ends: 2739 [2022-11-16 11:48:31,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:48:31,149 INFO L413 NwaCegarLoop]: 1575 mSDtfsCounter, 2948 mSDsluCounter, 1830 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 889 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3244 SdHoareTripleChecker+Valid, 3405 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 889 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:31,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3244 Valid, 3405 Invalid, 2636 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [889 Valid, 1746 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2022-11-16 11:48:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-11-16 11:48:31,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2240. [2022-11-16 11:48:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 1526 states have (on average 1.3636959370904325) internal successors, (2081), 1584 states have internal predecessors, (2081), 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) [2022-11-16 11:48:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 3258 transitions. [2022-11-16 11:48:31,505 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 3258 transitions. Word has length 17 [2022-11-16 11:48:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:31,506 INFO L495 AbstractCegarLoop]: Abstraction has 2240 states and 3258 transitions. [2022-11-16 11:48:31,506 INFO L496 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) [2022-11-16 11:48:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 3258 transitions. [2022-11-16 11:48:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:48:31,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:31,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:31,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:48:31,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:31,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash -261924452, now seen corresponding path program 1 times [2022-11-16 11:48:31,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:31,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324484502] [2022-11-16 11:48:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:31,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:31,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:48:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:31,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:48:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:31,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:31,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324484502] [2022-11-16 11:48:31,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324484502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:31,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:31,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:48:31,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956697142] [2022-11-16 11:48:31,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:31,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:48:31,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:31,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:48:31,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:48:31,971 INFO L87 Difference]: Start difference. First operand 2240 states and 3258 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) [2022-11-16 11:48:34,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:48:42,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:42,603 INFO L93 Difference]: Finished difference Result 6532 states and 9722 transitions. [2022-11-16 11:48:42,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:48:42,604 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 [2022-11-16 11:48:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:42,652 INFO L225 Difference]: With dead ends: 6532 [2022-11-16 11:48:42,652 INFO L226 Difference]: Without dead ends: 5438 [2022-11-16 11:48:42,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:48:42,672 INFO L413 NwaCegarLoop]: 2327 mSDtfsCounter, 2493 mSDsluCounter, 2430 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 697 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 4757 SdHoareTripleChecker+Invalid, 2672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:42,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2786 Valid, 4757 Invalid, 2672 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [697 Valid, 1974 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2022-11-16 11:48:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5438 states. [2022-11-16 11:48:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5438 to 4440. [2022-11-16 11:48:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4440 states, 3029 states have (on average 1.3641465830307031) internal successors, (4132), 3139 states have internal predecessors, (4132), 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) [2022-11-16 11:48:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4440 states to 4440 states and 6462 transitions. [2022-11-16 11:48:42,974 INFO L78 Accepts]: Start accepts. Automaton has 4440 states and 6462 transitions. Word has length 18 [2022-11-16 11:48:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:42,975 INFO L495 AbstractCegarLoop]: Abstraction has 4440 states and 6462 transitions. [2022-11-16 11:48:42,975 INFO L496 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) [2022-11-16 11:48:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4440 states and 6462 transitions. [2022-11-16 11:48:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:48:42,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:42,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:42,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:48:42,978 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:42,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:42,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1443448740, now seen corresponding path program 1 times [2022-11-16 11:48:42,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:42,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360725769] [2022-11-16 11:48:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:42,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:43,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:48:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:43,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:48:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:43,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 11:48:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:43,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:48:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:43,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:43,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360725769] [2022-11-16 11:48:43,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360725769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:43,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:43,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:48:43,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922153775] [2022-11-16 11:48:43,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:43,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:48:43,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:43,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:48:43,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:48:43,538 INFO L87 Difference]: Start difference. First operand 4440 states and 6462 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) [2022-11-16 11:48:45,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:48:53,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:53,658 INFO L93 Difference]: Finished difference Result 11899 states and 17751 transitions. [2022-11-16 11:48:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:48:53,659 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 [2022-11-16 11:48:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:53,745 INFO L225 Difference]: With dead ends: 11899 [2022-11-16 11:48:53,745 INFO L226 Difference]: Without dead ends: 10790 [2022-11-16 11:48:53,759 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:48:53,760 INFO L413 NwaCegarLoop]: 2183 mSDtfsCounter, 2380 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 1873 mSolverCounterSat, 857 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2671 SdHoareTripleChecker+Valid, 4074 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 1873 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:53,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2671 Valid, 4074 Invalid, 2731 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [857 Valid, 1873 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2022-11-16 11:48:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10790 states. [2022-11-16 11:48:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10790 to 7732. [2022-11-16 11:48:54,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7732 states, 5280 states have (on average 1.3642045454545455) internal successors, (7203), 5470 states have internal predecessors, (7203), 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) [2022-11-16 11:48:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7732 states to 7732 states and 11255 transitions. [2022-11-16 11:48:54,314 INFO L78 Accepts]: Start accepts. Automaton has 7732 states and 11255 transitions. Word has length 36 [2022-11-16 11:48:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:54,315 INFO L495 AbstractCegarLoop]: Abstraction has 7732 states and 11255 transitions. [2022-11-16 11:48:54,315 INFO L496 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) [2022-11-16 11:48:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 7732 states and 11255 transitions. [2022-11-16 11:48:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 11:48:54,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:54,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:54,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:48:54,323 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:48:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash 425142564, now seen corresponding path program 1 times [2022-11-16 11:48:54,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:54,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788971789] [2022-11-16 11:48:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:54,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:48:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:56,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:48:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:57,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 11:48:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:57,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:48:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:57,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:57,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788971789] [2022-11-16 11:48:57,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788971789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:57,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:48:57,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 11:48:57,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978990637] [2022-11-16 11:48:57,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:57,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:48:57,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:57,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:48:57,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:48:57,687 INFO L87 Difference]: Start difference. First operand 7732 states and 11255 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) [2022-11-16 11:48:59,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:49:36,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:36,406 INFO L93 Difference]: Finished difference Result 22161 states and 33021 transitions. [2022-11-16 11:49:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:49:36,411 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 [2022-11-16 11:49:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:36,524 INFO L225 Difference]: With dead ends: 22161 [2022-11-16 11:49:36,524 INFO L226 Difference]: Without dead ends: 16710 [2022-11-16 11:49:36,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:49:36,553 INFO L413 NwaCegarLoop]: 2422 mSDtfsCounter, 3193 mSDsluCounter, 22605 mSDsCounter, 0 mSdLazyCounter, 14582 mSolverCounterSat, 1339 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3490 SdHoareTripleChecker+Valid, 25027 SdHoareTripleChecker+Invalid, 15922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1339 IncrementalHoareTripleChecker+Valid, 14582 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:36,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3490 Valid, 25027 Invalid, 15922 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1339 Valid, 14582 Invalid, 1 Unknown, 0 Unchecked, 36.3s Time] [2022-11-16 11:49:36,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16710 states. [2022-11-16 11:49:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16710 to 11058. [2022-11-16 11:49:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11058 states, 7549 states have (on average 1.3637567889786726) internal successors, (10295), 7819 states have internal predecessors, (10295), 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) [2022-11-16 11:49:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11058 states to 11058 states and 16093 transitions. [2022-11-16 11:49:37,465 INFO L78 Accepts]: Start accepts. Automaton has 11058 states and 16093 transitions. Word has length 38 [2022-11-16 11:49:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:37,466 INFO L495 AbstractCegarLoop]: Abstraction has 11058 states and 16093 transitions. [2022-11-16 11:49:37,467 INFO L496 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) [2022-11-16 11:49:37,468 INFO L276 IsEmpty]: Start isEmpty. Operand 11058 states and 16093 transitions. [2022-11-16 11:49:37,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 11:49:37,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:37,469 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:49:37,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:49:37,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:37,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1766277677, now seen corresponding path program 1 times [2022-11-16 11:49:37,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:37,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558728697] [2022-11-16 11:49:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:37,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:40,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:49:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:40,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:49:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:40,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:49:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:40,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 11:49:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:41,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:49:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:49:41,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:41,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558728697] [2022-11-16 11:49:41,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558728697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:49:41,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:49:41,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 11:49:41,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176733052] [2022-11-16 11:49:41,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:41,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:49:41,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:41,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:49:41,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:49:41,428 INFO L87 Difference]: Start difference. First operand 11058 states and 16093 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) [2022-11-16 11:49:43,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:24,517 INFO L93 Difference]: Finished difference Result 17505 states and 26182 transitions. [2022-11-16 11:50:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:50:24,518 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 [2022-11-16 11:50:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:24,605 INFO L225 Difference]: With dead ends: 17505 [2022-11-16 11:50:24,605 INFO L226 Difference]: Without dead ends: 16433 [2022-11-16 11:50:24,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:50:24,617 INFO L413 NwaCegarLoop]: 1746 mSDtfsCounter, 4038 mSDsluCounter, 18426 mSDsCounter, 0 mSdLazyCounter, 15568 mSolverCounterSat, 1694 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4325 SdHoareTripleChecker+Valid, 20172 SdHoareTripleChecker+Invalid, 17263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1694 IncrementalHoareTripleChecker+Valid, 15568 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:24,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4325 Valid, 20172 Invalid, 17263 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1694 Valid, 15568 Invalid, 1 Unknown, 0 Unchecked, 39.7s Time] [2022-11-16 11:50:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16433 states. [2022-11-16 11:50:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16433 to 9994. [2022-11-16 11:50:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9994 states, 6826 states have (on average 1.362730735423381) internal successors, (9302), 7070 states have internal predecessors, (9302), 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) [2022-11-16 11:50:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9994 states to 9994 states and 14530 transitions. [2022-11-16 11:50:25,741 INFO L78 Accepts]: Start accepts. Automaton has 9994 states and 14530 transitions. Word has length 45 [2022-11-16 11:50:25,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:25,741 INFO L495 AbstractCegarLoop]: Abstraction has 9994 states and 14530 transitions. [2022-11-16 11:50:25,742 INFO L496 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) [2022-11-16 11:50:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 9994 states and 14530 transitions. [2022-11-16 11:50:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 11:50:25,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:25,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:25,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:50:25,744 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:50:25,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:25,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1433601597, now seen corresponding path program 1 times [2022-11-16 11:50:25,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:25,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92428531] [2022-11-16 11:50:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:25,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:26,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:50:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:26,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:50:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:26,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 11:50:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:26,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:50:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:26,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:50:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:26,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-16 11:50:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:26,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:26,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92428531] [2022-11-16 11:50:26,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92428531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:26,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:26,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:50:26,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332831202] [2022-11-16 11:50:26,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:26,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:50:26,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:50:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:50:26,279 INFO L87 Difference]: Start difference. First operand 9994 states and 14530 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) [2022-11-16 11:50:28,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:30,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:38,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:38,282 INFO L93 Difference]: Finished difference Result 14859 states and 22209 transitions. [2022-11-16 11:50:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:50:38,283 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 [2022-11-16 11:50:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:38,358 INFO L225 Difference]: With dead ends: 14859 [2022-11-16 11:50:38,358 INFO L226 Difference]: Without dead ends: 14838 [2022-11-16 11:50:38,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:50:38,366 INFO L413 NwaCegarLoop]: 2140 mSDtfsCounter, 2596 mSDsluCounter, 2364 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 658 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2883 SdHoareTripleChecker+Valid, 4504 SdHoareTripleChecker+Invalid, 2755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 658 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:38,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2883 Valid, 4504 Invalid, 2755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [658 Valid, 2095 Invalid, 2 Unknown, 0 Unchecked, 10.5s Time] [2022-11-16 11:50:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14838 states. [2022-11-16 11:50:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14838 to 7822. [2022-11-16 11:50:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7822 states, 5346 states have (on average 1.360082304526749) internal successors, (7271), 5538 states have internal predecessors, (7271), 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) [2022-11-16 11:50:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7822 states to 7822 states and 11353 transitions. [2022-11-16 11:50:39,264 INFO L78 Accepts]: Start accepts. Automaton has 7822 states and 11353 transitions. Word has length 52 [2022-11-16 11:50:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:39,265 INFO L495 AbstractCegarLoop]: Abstraction has 7822 states and 11353 transitions. [2022-11-16 11:50:39,265 INFO L496 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) [2022-11-16 11:50:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 7822 states and 11353 transitions. [2022-11-16 11:50:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 11:50:39,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:39,267 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:50:39,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:50:39,268 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:50:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:39,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1376041650, now seen corresponding path program 1 times [2022-11-16 11:50:39,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:39,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474778852] [2022-11-16 11:50:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:39,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:42,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:50:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:42,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:50:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:42,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:50:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:42,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:50:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:42,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:50:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:42,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-16 11:50:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:42,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 11:50:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:50:42,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:42,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474778852] [2022-11-16 11:50:42,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474778852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:42,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:42,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 11:50:42,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130903135] [2022-11-16 11:50:42,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:42,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:50:42,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:42,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:50:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:50:42,958 INFO L87 Difference]: Start difference. First operand 7822 states and 11353 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) [2022-11-16 11:50:44,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:47,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:51:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:23,554 INFO L93 Difference]: Finished difference Result 13257 states and 19764 transitions. [2022-11-16 11:51:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:51:23,555 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 [2022-11-16 11:51:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:23,610 INFO L225 Difference]: With dead ends: 13257 [2022-11-16 11:51:23,610 INFO L226 Difference]: Without dead ends: 12188 [2022-11-16 11:51:23,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:51:23,620 INFO L413 NwaCegarLoop]: 2098 mSDtfsCounter, 3232 mSDsluCounter, 19706 mSDsCounter, 0 mSdLazyCounter, 15220 mSolverCounterSat, 1068 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3526 SdHoareTripleChecker+Valid, 21804 SdHoareTripleChecker+Invalid, 16290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1068 IncrementalHoareTripleChecker+Valid, 15220 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:23,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3526 Valid, 21804 Invalid, 16290 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1068 Valid, 15220 Invalid, 2 Unknown, 0 Unchecked, 37.8s Time] [2022-11-16 11:51:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12188 states. [2022-11-16 11:51:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12188 to 7820. [2022-11-16 11:51:24,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7820 states, 5344 states have (on average 1.3600299401197604) internal successors, (7268), 5536 states have internal predecessors, (7268), 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) [2022-11-16 11:51:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7820 states to 7820 states and 11350 transitions. [2022-11-16 11:51:24,733 INFO L78 Accepts]: Start accepts. Automaton has 7820 states and 11350 transitions. Word has length 53 [2022-11-16 11:51:24,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:24,734 INFO L495 AbstractCegarLoop]: Abstraction has 7820 states and 11350 transitions. [2022-11-16 11:51:24,734 INFO L496 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) [2022-11-16 11:51:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 7820 states and 11350 transitions. [2022-11-16 11:51:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 11:51:24,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:24,735 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:51:24,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:51:24,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:51:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash -960297505, now seen corresponding path program 1 times [2022-11-16 11:51:24,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:24,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591112475] [2022-11-16 11:51:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:24,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:27,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:51:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:27,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:51:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:27,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:51:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:27,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:51:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:27,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:51:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:28,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-16 11:51:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:28,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 11:51:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:51:28,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:28,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591112475] [2022-11-16 11:51:28,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591112475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:51:28,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:51:28,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 11:51:28,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857321778] [2022-11-16 11:51:28,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:51:28,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:51:28,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:28,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:51:28,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:51:28,121 INFO L87 Difference]: Start difference. First operand 7820 states and 11350 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) [2022-11-16 11:51:30,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:51:32,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:51:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:57,082 INFO L93 Difference]: Finished difference Result 11208 states and 16556 transitions. [2022-11-16 11:51:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:51:57,083 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 [2022-11-16 11:51:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:57,121 INFO L225 Difference]: With dead ends: 11208 [2022-11-16 11:51:57,121 INFO L226 Difference]: Without dead ends: 6817 [2022-11-16 11:51:57,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:51:57,139 INFO L413 NwaCegarLoop]: 1459 mSDtfsCounter, 965 mSDsluCounter, 16761 mSDsCounter, 0 mSdLazyCounter, 9473 mSolverCounterSat, 305 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 18220 SdHoareTripleChecker+Invalid, 9780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 9473 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:57,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 18220 Invalid, 9780 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [305 Valid, 9473 Invalid, 2 Unknown, 0 Unchecked, 26.5s Time] [2022-11-16 11:51:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6817 states. [2022-11-16 11:51:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6817 to 5584. [2022-11-16 11:51:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5584 states, 3813 states have (on average 1.3595594020456334) internal successors, (5184), 3948 states have internal predecessors, (5184), 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) [2022-11-16 11:51:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5584 states to 5584 states and 8104 transitions. [2022-11-16 11:51:58,065 INFO L78 Accepts]: Start accepts. Automaton has 5584 states and 8104 transitions. Word has length 56 [2022-11-16 11:51:58,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:58,066 INFO L495 AbstractCegarLoop]: Abstraction has 5584 states and 8104 transitions. [2022-11-16 11:51:58,066 INFO L496 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) [2022-11-16 11:51:58,067 INFO L276 IsEmpty]: Start isEmpty. Operand 5584 states and 8104 transitions. [2022-11-16 11:51:58,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 11:51:58,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:58,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:58,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:51:58,069 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:51:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:58,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1420066383, now seen corresponding path program 1 times [2022-11-16 11:51:58,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:58,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799167656] [2022-11-16 11:51:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:58,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:58,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:51:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:58,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:51:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:58,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 11:51:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:58,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:51:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:58,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:51:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:58,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-16 11:51:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:58,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:51:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:51:58,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:58,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799167656] [2022-11-16 11:51:58,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799167656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:51:58,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:51:58,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 11:51:58,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667724244] [2022-11-16 11:51:58,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:51:58,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:51:58,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:58,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:51:58,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:51:58,753 INFO L87 Difference]: Start difference. First operand 5584 states and 8104 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) [2022-11-16 11:52:00,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:52:02,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:52:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:52:28,695 INFO L93 Difference]: Finished difference Result 8950 states and 13472 transitions. [2022-11-16 11:52:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:52:28,696 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 [2022-11-16 11:52:28,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:52:28,733 INFO L225 Difference]: With dead ends: 8950 [2022-11-16 11:52:28,734 INFO L226 Difference]: Without dead ends: 7858 [2022-11-16 11:52:28,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:52:28,742 INFO L413 NwaCegarLoop]: 1304 mSDtfsCounter, 3127 mSDsluCounter, 3980 mSDsCounter, 0 mSdLazyCounter, 8595 mSolverCounterSat, 1690 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3364 SdHoareTripleChecker+Valid, 5284 SdHoareTripleChecker+Invalid, 10287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1690 IncrementalHoareTripleChecker+Valid, 8595 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:52:28,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3364 Valid, 5284 Invalid, 10287 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1690 Valid, 8595 Invalid, 2 Unknown, 0 Unchecked, 28.0s Time] [2022-11-16 11:52:28,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7858 states. [2022-11-16 11:52:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7858 to 5573. [2022-11-16 11:52:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5573 states, 3807 states have (on average 1.3593380614657211) internal successors, (5175), 3940 states have internal predecessors, (5175), 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) [2022-11-16 11:52:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5573 states to 5573 states and 8086 transitions. [2022-11-16 11:52:29,622 INFO L78 Accepts]: Start accepts. Automaton has 5573 states and 8086 transitions. Word has length 64 [2022-11-16 11:52:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:52:29,623 INFO L495 AbstractCegarLoop]: Abstraction has 5573 states and 8086 transitions. [2022-11-16 11:52:29,623 INFO L496 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) [2022-11-16 11:52:29,623 INFO L276 IsEmpty]: Start isEmpty. Operand 5573 states and 8086 transitions. [2022-11-16 11:52:29,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 11:52:29,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:52:29,625 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:52:29,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:52:29,625 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:52:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:52:29,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1593238031, now seen corresponding path program 1 times [2022-11-16 11:52:29,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:52:29,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315773580] [2022-11-16 11:52:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:52:29,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:52:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:30,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:52:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:30,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:52:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:30,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 11:52:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:30,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:52:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:30,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:52:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:30,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 11:52:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:52:30,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:52:30,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315773580] [2022-11-16 11:52:30,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315773580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:52:30,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:52:30,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:52:30,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887790946] [2022-11-16 11:52:30,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:52:30,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:52:30,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:52:30,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:52:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:52:30,293 INFO L87 Difference]: Start difference. First operand 5573 states and 8086 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) [2022-11-16 11:52:32,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:52:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:52:43,844 INFO L93 Difference]: Finished difference Result 8219 states and 12227 transitions. [2022-11-16 11:52:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:52:43,844 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 [2022-11-16 11:52:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:52:43,861 INFO L225 Difference]: With dead ends: 8219 [2022-11-16 11:52:43,861 INFO L226 Difference]: Without dead ends: 4931 [2022-11-16 11:52:43,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:52:43,875 INFO L413 NwaCegarLoop]: 1609 mSDtfsCounter, 1664 mSDsluCounter, 5332 mSDsCounter, 0 mSdLazyCounter, 3938 mSolverCounterSat, 916 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1858 SdHoareTripleChecker+Valid, 6941 SdHoareTripleChecker+Invalid, 4855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 3938 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:52:43,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1858 Valid, 6941 Invalid, 4855 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [916 Valid, 3938 Invalid, 1 Unknown, 0 Unchecked, 12.2s Time] [2022-11-16 11:52:43,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2022-11-16 11:52:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 3415. [2022-11-16 11:52:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 2338 states have (on average 1.350727117194183) internal successors, (3158), 2417 states have internal predecessors, (3158), 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) [2022-11-16 11:52:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 4918 transitions. [2022-11-16 11:52:44,711 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 4918 transitions. Word has length 63 [2022-11-16 11:52:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:52:44,711 INFO L495 AbstractCegarLoop]: Abstraction has 3415 states and 4918 transitions. [2022-11-16 11:52:44,711 INFO L496 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) [2022-11-16 11:52:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 4918 transitions. [2022-11-16 11:52:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 11:52:44,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:52:44,713 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:52:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:52:44,713 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:52:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:52:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1156470027, now seen corresponding path program 1 times [2022-11-16 11:52:44,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:52:44,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236476557] [2022-11-16 11:52:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:52:44,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:52:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:45,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:52:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:45,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:52:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:45,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 11:52:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:45,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:52:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:45,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:52:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:45,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 11:52:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:52:45,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:52:45,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236476557] [2022-11-16 11:52:45,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236476557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:52:45,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:52:45,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:52:45,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798579013] [2022-11-16 11:52:45,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:52:45,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:52:45,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:52:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:52:45,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:52:45,402 INFO L87 Difference]: Start difference. First operand 3415 states and 4918 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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) [2022-11-16 11:52:47,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:52:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:52:56,046 INFO L93 Difference]: Finished difference Result 4415 states and 6584 transitions. [2022-11-16 11:52:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:52:56,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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 [2022-11-16 11:52:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:52:56,061 INFO L225 Difference]: With dead ends: 4415 [2022-11-16 11:52:56,061 INFO L226 Difference]: Without dead ends: 4410 [2022-11-16 11:52:56,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:52:56,064 INFO L413 NwaCegarLoop]: 1677 mSDtfsCounter, 1389 mSDsluCounter, 4197 mSDsCounter, 0 mSdLazyCounter, 2755 mSolverCounterSat, 641 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 5874 SdHoareTripleChecker+Invalid, 3397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 2755 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:52:56,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1578 Valid, 5874 Invalid, 3397 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [641 Valid, 2755 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2022-11-16 11:52:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2022-11-16 11:52:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 3409. [2022-11-16 11:52:56,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3409 states, 2333 states have (on average 1.3506215173596228) internal successors, (3151), 2411 states have internal predecessors, (3151), 880 states have call successors, (880), 198 states have call predecessors, (880), 195 states have return successors, (879), 865 states have call predecessors, (879), 876 states have call successors, (879) [2022-11-16 11:52:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 4910 transitions. [2022-11-16 11:52:56,828 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 4910 transitions. Word has length 66 [2022-11-16 11:52:56,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:52:56,828 INFO L495 AbstractCegarLoop]: Abstraction has 3409 states and 4910 transitions. [2022-11-16 11:52:56,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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) [2022-11-16 11:52:56,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 4910 transitions. [2022-11-16 11:52:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:52:56,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:52:56,831 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:52:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:52:56,831 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:52:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:52:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1600126701, now seen corresponding path program 1 times [2022-11-16 11:52:56,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:52:56,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406851542] [2022-11-16 11:52:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:52:56,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:52:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:57,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:52:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:57,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:52:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:57,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 11:52:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:57,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:52:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:57,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:52:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:57,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 11:52:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:57,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 11:52:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:52:57,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:52:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406851542] [2022-11-16 11:52:57,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406851542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:52:57,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:52:57,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:52:57,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092796331] [2022-11-16 11:52:57,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:52:57,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:52:57,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:52:57,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:52:57,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:52:57,712 INFO L87 Difference]: Start difference. First operand 3409 states and 4910 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) [2022-11-16 11:52:59,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:53:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:11,266 INFO L93 Difference]: Finished difference Result 6576 states and 9732 transitions. [2022-11-16 11:53:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:53:11,267 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 [2022-11-16 11:53:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:11,289 INFO L225 Difference]: With dead ends: 6576 [2022-11-16 11:53:11,289 INFO L226 Difference]: Without dead ends: 4398 [2022-11-16 11:53:11,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:53:11,299 INFO L413 NwaCegarLoop]: 2097 mSDtfsCounter, 1575 mSDsluCounter, 6715 mSDsCounter, 0 mSdLazyCounter, 3956 mSolverCounterSat, 757 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 8812 SdHoareTripleChecker+Invalid, 4714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 3956 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:11,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 8812 Invalid, 4714 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [757 Valid, 3956 Invalid, 1 Unknown, 0 Unchecked, 12.2s Time] [2022-11-16 11:53:11,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4398 states. [2022-11-16 11:53:11,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4398 to 3390. [2022-11-16 11:53:11,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3390 states, 2321 states have (on average 1.3507109004739337) internal successors, (3135), 2398 states have internal predecessors, (3135), 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) [2022-11-16 11:53:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3390 states to 3390 states and 4885 transitions. [2022-11-16 11:53:11,969 INFO L78 Accepts]: Start accepts. Automaton has 3390 states and 4885 transitions. Word has length 69 [2022-11-16 11:53:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:11,970 INFO L495 AbstractCegarLoop]: Abstraction has 3390 states and 4885 transitions. [2022-11-16 11:53:11,970 INFO L496 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) [2022-11-16 11:53:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3390 states and 4885 transitions. [2022-11-16 11:53:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 11:53:11,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:11,971 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:53:11,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:53:11,971 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:53:11,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:11,972 INFO L85 PathProgramCache]: Analyzing trace with hash -838499144, now seen corresponding path program 1 times [2022-11-16 11:53:11,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:53:11,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454984869] [2022-11-16 11:53:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:11,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:53:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:12,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:53:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:12,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:53:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:12,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 11:53:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:12,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:53:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:12,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:53:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:12,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-16 11:53:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:12,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 11:53:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:12,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 11:53:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:12,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-16 11:53:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:53:12,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:53:12,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454984869] [2022-11-16 11:53:12,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454984869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:53:12,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:53:12,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 11:53:12,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622075262] [2022-11-16 11:53:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:53:12,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:53:12,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:53:12,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:53:12,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:53:12,947 INFO L87 Difference]: Start difference. First operand 3390 states and 4885 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) [2022-11-16 11:53:14,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:53:17,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:53:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:45,661 INFO L93 Difference]: Finished difference Result 4971 states and 7289 transitions. [2022-11-16 11:53:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:53:45,662 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 [2022-11-16 11:53:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:45,670 INFO L225 Difference]: With dead ends: 4971 [2022-11-16 11:53:45,671 INFO L226 Difference]: Without dead ends: 2797 [2022-11-16 11:53:45,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:53:45,677 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 1848 mSDsluCounter, 2701 mSDsCounter, 0 mSdLazyCounter, 10150 mSolverCounterSat, 782 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1973 SdHoareTripleChecker+Valid, 3194 SdHoareTripleChecker+Invalid, 10934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 10150 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:45,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1973 Valid, 3194 Invalid, 10934 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [782 Valid, 10150 Invalid, 2 Unknown, 0 Unchecked, 31.4s Time] [2022-11-16 11:53:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-11-16 11:53:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2234. [2022-11-16 11:53:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 1527 states have (on average 1.3542894564505565) internal successors, (2068), 1579 states have internal predecessors, (2068), 581 states have call successors, (581), 127 states have call predecessors, (581), 125 states have return successors, (577), 571 states have call predecessors, (577), 577 states have call successors, (577) [2022-11-16 11:53:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 3226 transitions. [2022-11-16 11:53:46,071 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 3226 transitions. Word has length 71 [2022-11-16 11:53:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:46,071 INFO L495 AbstractCegarLoop]: Abstraction has 2234 states and 3226 transitions. [2022-11-16 11:53:46,071 INFO L496 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) [2022-11-16 11:53:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 3226 transitions. [2022-11-16 11:53:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 11:53:46,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:46,073 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:53:46,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:53:46,073 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:53:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:46,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1620541591, now seen corresponding path program 1 times [2022-11-16 11:53:46,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:53:46,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840704115] [2022-11-16 11:53:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:46,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:53:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:47,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:53:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:47,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:53:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:47,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 11:53:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:47,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:53:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:47,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:53:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:47,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 11:53:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:47,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:53:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:47,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 11:53:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:53:47,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:53:47,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840704115] [2022-11-16 11:53:47,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840704115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:53:47,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:53:47,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-16 11:53:47,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37821334] [2022-11-16 11:53:47,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:53:47,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:53:47,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:53:47,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:53:47,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:53:47,412 INFO L87 Difference]: Start difference. First operand 2234 states and 3226 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:53:49,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:54:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:02,906 INFO L93 Difference]: Finished difference Result 2486 states and 3643 transitions. [2022-11-16 11:54:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:54:02,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-11-16 11:54:02,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:02,912 INFO L225 Difference]: With dead ends: 2486 [2022-11-16 11:54:02,912 INFO L226 Difference]: Without dead ends: 1418 [2022-11-16 11:54:02,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:54:02,916 INFO L413 NwaCegarLoop]: 1239 mSDtfsCounter, 935 mSDsluCounter, 7947 mSDsCounter, 0 mSdLazyCounter, 5364 mSolverCounterSat, 312 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 9186 SdHoareTripleChecker+Invalid, 5677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 5364 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:02,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 9186 Invalid, 5677 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [312 Valid, 5364 Invalid, 1 Unknown, 0 Unchecked, 14.7s Time] [2022-11-16 11:54:02,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-11-16 11:54:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1169. [2022-11-16 11:54:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 802 states have (on average 1.339152119700748) internal successors, (1074), 829 states have internal predecessors, (1074), 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) [2022-11-16 11:54:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1666 transitions. [2022-11-16 11:54:03,196 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1666 transitions. Word has length 77 [2022-11-16 11:54:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:03,196 INFO L495 AbstractCegarLoop]: Abstraction has 1169 states and 1666 transitions. [2022-11-16 11:54:03,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:54:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1666 transitions. [2022-11-16 11:54:03,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 11:54:03,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:03,198 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:54:03,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:54:03,198 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:03,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:03,199 INFO L85 PathProgramCache]: Analyzing trace with hash -625921759, now seen corresponding path program 1 times [2022-11-16 11:54:03,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:03,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109337896] [2022-11-16 11:54:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:03,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:03,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:54:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:03,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:54:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:03,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 11:54:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:03,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:54:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:03,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:54:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:03,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 11:54:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:03,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-16 11:54:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:03,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 11:54:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:03,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-16 11:54:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:54:03,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:03,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109337896] [2022-11-16 11:54:03,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109337896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:03,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:03,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:54:03,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471035065] [2022-11-16 11:54:03,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:03,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:54:03,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:54:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:54:03,640 INFO L87 Difference]: Start difference. First operand 1169 states and 1666 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) [2022-11-16 11:54:05,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:54:07,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:54:09,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:54:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:18,720 INFO L93 Difference]: Finished difference Result 1420 states and 2082 transitions. [2022-11-16 11:54:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:54:18,721 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 [2022-11-16 11:54:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:18,725 INFO L225 Difference]: With dead ends: 1420 [2022-11-16 11:54:18,725 INFO L226 Difference]: Without dead ends: 1385 [2022-11-16 11:54:18,726 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:54:18,727 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 2663 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 2369 mSolverCounterSat, 1370 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2776 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 3742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1370 IncrementalHoareTripleChecker+Valid, 2369 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:18,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2776 Valid, 996 Invalid, 3742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1370 Valid, 2369 Invalid, 3 Unknown, 0 Unchecked, 14.5s Time] [2022-11-16 11:54:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-11-16 11:54:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1136. [2022-11-16 11:54:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 780 states have (on average 1.344871794871795) internal successors, (1049), 805 states have internal predecessors, (1049), 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) [2022-11-16 11:54:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1630 transitions. [2022-11-16 11:54:18,924 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1630 transitions. Word has length 79 [2022-11-16 11:54:18,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:18,924 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1630 transitions. [2022-11-16 11:54:18,924 INFO L496 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) [2022-11-16 11:54:18,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1630 transitions. [2022-11-16 11:54:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 11:54:18,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:18,926 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:54:18,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:54:18,926 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:18,927 INFO L85 PathProgramCache]: Analyzing trace with hash -78145788, now seen corresponding path program 1 times [2022-11-16 11:54:18,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:18,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142196969] [2022-11-16 11:54:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:18,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:19,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:54:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:19,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 11:54:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:19,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 11:54:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:19,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 11:54:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:19,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 11:54:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:19,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 11:54:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:19,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 11:54:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:19,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-16 11:54:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:54:19,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:19,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142196969] [2022-11-16 11:54:19,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142196969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:19,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:19,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:54:19,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290458242] [2022-11-16 11:54:19,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:19,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:19,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:54:19,256 INFO L87 Difference]: Start difference. First operand 1136 states and 1630 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) [2022-11-16 11:54:21,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:54:23,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:54:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:26,967 INFO L93 Difference]: Finished difference Result 1385 states and 2045 transitions. [2022-11-16 11:54:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:54:26,968 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 [2022-11-16 11:54:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:26,969 INFO L225 Difference]: With dead ends: 1385 [2022-11-16 11:54:26,969 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 11:54:26,977 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:54:26,979 INFO L413 NwaCegarLoop]: 1220 mSDtfsCounter, 2164 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 612 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2368 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:26,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2368 Valid, 1939 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 755 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2022-11-16 11:54:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 11:54:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 11:54:26,981 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) [2022-11-16 11:54:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 11:54:26,992 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2022-11-16 11:54:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:26,993 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 11:54:26,993 INFO L496 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) [2022-11-16 11:54:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 11:54:26,993 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 11:54:27,008 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 11:54:27,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:54:27,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-16 11:59:37,806 WARN L233 SmtUtils]: Spent 5.17m on a formula simplification. DAG size of input: 95 DAG size of output: 87 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)