./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/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_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/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_58ef9828-1f75-4292-92f4-11b1569e0221/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 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 --- 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 12:02:21,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:02:21,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:02:21,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:02:21,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:02:21,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:02:21,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:02:21,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:02:21,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:02:21,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:02:21,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:02:21,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:02:21,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:02:21,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:02:21,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:02:21,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:02:21,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:02:21,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:02:21,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:02:21,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:02:21,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:02:21,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:02:21,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:02:21,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:02:21,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:02:21,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:02:21,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:02:21,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:02:21,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:02:21,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:02:21,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:02:21,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:02:21,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:02:21,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:02:21,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:02:21,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:02:21,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:02:21,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:02:21,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:02:21,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:02:21,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:02:21,528 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 12:02:21,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:02:21,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:02:21,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:02:21,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:02:21,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:02:21,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:02:21,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:02:21,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:02:21,577 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:02:21,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:02:21,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:02:21,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:02:21,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:02:21,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:02:21,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:02:21,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:02:21,581 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:02:21,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:02:21,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:02:21,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:02:21,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:02:21,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:02:21,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:02:21,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:02:21,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:02:21,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:02:21,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:02:21,585 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:02:21,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:02:21,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:02:21,586 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_58ef9828-1f75-4292-92f4-11b1569e0221/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 [2022-11-16 12:02:21,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:02:21,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:02:21,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:02:21,956 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:02:21,957 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:02:21,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2022-11-16 12:02:22,043 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/data/c67e634bf/1635d45b91ed4d759f3f3bae4ca9bf18/FLAGf0e5bacde [2022-11-16 12:02:22,879 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:02:22,880 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2022-11-16 12:02:22,924 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/data/c67e634bf/1635d45b91ed4d759f3f3bae4ca9bf18/FLAGf0e5bacde [2022-11-16 12:02:22,972 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/data/c67e634bf/1635d45b91ed4d759f3f3bae4ca9bf18 [2022-11-16 12:02:22,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:02:22,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:02:22,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:02:22,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:02:22,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:02:22,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:02:22" (1/1) ... [2022-11-16 12:02:22,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca89dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:22, skipping insertion in model container [2022-11-16 12:02:22,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:02:22" (1/1) ... [2022-11-16 12:02:22,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:02:23,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:02:24,640 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_58ef9828-1f75-4292-92f4-11b1569e0221/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2022-11-16 12:02:24,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:02:24,738 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:02:25,057 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_58ef9828-1f75-4292-92f4-11b1569e0221/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2022-11-16 12:02:25,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:02:25,119 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:02:25,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25 WrapperNode [2022-11-16 12:02:25,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:02:25,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:02:25,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:02:25,122 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:02:25,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25" (1/1) ... [2022-11-16 12:02:25,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25" (1/1) ... [2022-11-16 12:02:25,357 INFO L138 Inliner]: procedures = 191, calls = 1267, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3367 [2022-11-16 12:02:25,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:02:25,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:02:25,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:02:25,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:02:25,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25" (1/1) ... [2022-11-16 12:02:25,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25" (1/1) ... [2022-11-16 12:02:25,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25" (1/1) ... [2022-11-16 12:02:25,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25" (1/1) ... [2022-11-16 12:02:25,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25" (1/1) ... [2022-11-16 12:02:25,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25" (1/1) ... [2022-11-16 12:02:25,646 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25" (1/1) ... [2022-11-16 12:02:25,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25" (1/1) ... [2022-11-16 12:02:25,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:02:25,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:02:25,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:02:25,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:02:25,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25" (1/1) ... [2022-11-16 12:02:25,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:02:25,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:25,747 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:02:25,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:02:25,810 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2022-11-16 12:02:25,811 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2022-11-16 12:02:25,811 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-16 12:02:25,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-16 12:02:25,811 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-11-16 12:02:25,811 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-11-16 12:02:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-16 12:02:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-16 12:02:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-16 12:02:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:02:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2022-11-16 12:02:25,813 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2022-11-16 12:02:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2022-11-16 12:02:25,813 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2022-11-16 12:02:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-16 12:02:25,813 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-16 12:02:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2022-11-16 12:02:25,814 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2022-11-16 12:02:25,814 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2022-11-16 12:02:25,814 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2022-11-16 12:02:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-16 12:02:25,815 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-16 12:02:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-16 12:02:25,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-16 12:02:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2022-11-16 12:02:25,816 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2022-11-16 12:02:25,816 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2022-11-16 12:02:25,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2022-11-16 12:02:25,816 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2022-11-16 12:02:25,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2022-11-16 12:02:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-11-16 12:02:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-11-16 12:02:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2022-11-16 12:02:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2022-11-16 12:02:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2022-11-16 12:02:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2022-11-16 12:02:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-11-16 12:02:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-11-16 12:02:25,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:02:25,819 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-16 12:02:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-16 12:02:25,819 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-16 12:02:25,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-16 12:02:25,820 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2022-11-16 12:02:25,820 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2022-11-16 12:02:25,820 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2022-11-16 12:02:25,820 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2022-11-16 12:02:25,820 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2022-11-16 12:02:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2022-11-16 12:02:25,821 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-11-16 12:02:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-11-16 12:02:25,822 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-16 12:02:25,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-16 12:02:25,822 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2022-11-16 12:02:25,822 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2022-11-16 12:02:25,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:02:25,823 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-11-16 12:02:25,824 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2022-11-16 12:02:25,825 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2022-11-16 12:02:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-11-16 12:02:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-16 12:02:25,826 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-16 12:02:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2022-11-16 12:02:25,826 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2022-11-16 12:02:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-11-16 12:02:25,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-11-16 12:02:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:02:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2022-11-16 12:02:25,827 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2022-11-16 12:02:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2022-11-16 12:02:25,827 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2022-11-16 12:02:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:02:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 12:02:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-16 12:02:25,829 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-16 12:02:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-16 12:02:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2022-11-16 12:02:25,830 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2022-11-16 12:02:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2022-11-16 12:02:25,830 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2022-11-16 12:02:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 12:02:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-11-16 12:02:25,831 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-11-16 12:02:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2022-11-16 12:02:25,831 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2022-11-16 12:02:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2022-11-16 12:02:25,832 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2022-11-16 12:02:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-16 12:02:25,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-16 12:02:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-16 12:02:25,833 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-16 12:02:25,833 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-16 12:02:25,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-16 12:02:25,833 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-11-16 12:02:25,834 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-11-16 12:02:25,834 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-16 12:02:25,835 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-16 12:02:25,835 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-16 12:02:25,836 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-16 12:02:25,836 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2022-11-16 12:02:25,836 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2022-11-16 12:02:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:02:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 12:02:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-11-16 12:02:25,837 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-11-16 12:02:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-16 12:02:25,838 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-16 12:02:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-11-16 12:02:25,838 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-11-16 12:02:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-16 12:02:25,839 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-16 12:02:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2022-11-16 12:02:25,839 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2022-11-16 12:02:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-16 12:02:25,840 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-16 12:02:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-11-16 12:02:25,841 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-11-16 12:02:25,842 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-16 12:02:25,843 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-16 12:02:25,846 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-16 12:02:25,846 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-16 12:02:25,847 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2022-11-16 12:02:25,847 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2022-11-16 12:02:25,848 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2022-11-16 12:02:25,849 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2022-11-16 12:02:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-16 12:02:25,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-16 12:02:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-16 12:02:25,856 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-16 12:02:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2022-11-16 12:02:25,857 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2022-11-16 12:02:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-11-16 12:02:25,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-11-16 12:02:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2022-11-16 12:02:25,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2022-11-16 12:02:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:02:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-11-16 12:02:25,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-11-16 12:02:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-11-16 12:02:25,858 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-11-16 12:02:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-16 12:02:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-16 12:02:25,859 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-16 12:02:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-11-16 12:02:25,859 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-11-16 12:02:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:02:25,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:02:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-16 12:02:25,860 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-16 12:02:26,724 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:02:26,728 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:03:01,132 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:03:01,156 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:03:01,157 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 12:03:01,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:03:01 BoogieIcfgContainer [2022-11-16 12:03:01,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:03:01,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:03:01,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:03:01,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:03:01,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:02:22" (1/3) ... [2022-11-16 12:03:01,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7158db45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:03:01, skipping insertion in model container [2022-11-16 12:03:01,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:25" (2/3) ... [2022-11-16 12:03:01,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7158db45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:03:01, skipping insertion in model container [2022-11-16 12:03:01,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:03:01" (3/3) ... [2022-11-16 12:03:01,172 INFO L112 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2022-11-16 12:03:01,193 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:03:01,194 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:03:01,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:03:01,299 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;@110a079c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:03:01,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:03:01,311 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 12:03:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:03:01,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:01,321 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 12:03:01,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:01,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:01,331 INFO L85 PathProgramCache]: Analyzing trace with hash -285510380, now seen corresponding path program 1 times [2022-11-16 12:03:01,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:01,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692190396] [2022-11-16 12:03:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:01,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:02,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:03:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:02,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:03:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:02,328 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 12:03:02,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:02,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692190396] [2022-11-16 12:03:02,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692190396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:03:02,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:03:02,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:03:02,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964450121] [2022-11-16 12:03:02,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:03:02,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:03:02,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:02,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:03:02,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:03:02,387 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 12:03:04,487 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 12:03:12,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:12,602 INFO L93 Difference]: Finished difference Result 3972 states and 6021 transitions. [2022-11-16 12:03:12,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:03:12,606 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 12:03:12,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:12,652 INFO L225 Difference]: With dead ends: 3972 [2022-11-16 12:03:12,653 INFO L226 Difference]: Without dead ends: 2739 [2022-11-16 12:03:12,674 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 12:03:12,679 INFO L413 NwaCegarLoop]: 1574 mSDtfsCounter, 2948 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 890 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3245 SdHoareTripleChecker+Valid, 3403 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 890 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:12,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3245 Valid, 3403 Invalid, 2636 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [890 Valid, 1745 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2022-11-16 12:03:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-11-16 12:03:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2240. [2022-11-16 12:03:12,998 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 12:03:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 3258 transitions. [2022-11-16 12:03:13,020 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 3258 transitions. Word has length 17 [2022-11-16 12:03:13,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:13,021 INFO L495 AbstractCegarLoop]: Abstraction has 2240 states and 3258 transitions. [2022-11-16 12:03:13,021 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 12:03:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 3258 transitions. [2022-11-16 12:03:13,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:03:13,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:13,023 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 12:03:13,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:03:13,024 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:13,025 INFO L85 PathProgramCache]: Analyzing trace with hash -261924452, now seen corresponding path program 1 times [2022-11-16 12:03:13,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:13,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811628842] [2022-11-16 12:03:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:13,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:13,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:03:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:13,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:03:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:13,500 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 12:03:13,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:13,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811628842] [2022-11-16 12:03:13,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811628842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:03:13,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:03:13,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:03:13,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721600672] [2022-11-16 12:03:13,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:03:13,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:03:13,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:13,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:03:13,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:03:13,504 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 12:03:15,557 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 12:03:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:23,836 INFO L93 Difference]: Finished difference Result 6532 states and 9722 transitions. [2022-11-16 12:03:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:03:23,837 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 12:03:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:23,884 INFO L225 Difference]: With dead ends: 6532 [2022-11-16 12:03:23,884 INFO L226 Difference]: Without dead ends: 5438 [2022-11-16 12:03:23,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:03:23,894 INFO L413 NwaCegarLoop]: 2328 mSDtfsCounter, 2493 mSDsluCounter, 2431 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 697 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 4759 SdHoareTripleChecker+Invalid, 2672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:23,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2786 Valid, 4759 Invalid, 2672 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [697 Valid, 1974 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2022-11-16 12:03:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5438 states. [2022-11-16 12:03:24,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5438 to 4440. [2022-11-16 12:03:24,160 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 12:03:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4440 states to 4440 states and 6462 transitions. [2022-11-16 12:03:24,190 INFO L78 Accepts]: Start accepts. Automaton has 4440 states and 6462 transitions. Word has length 18 [2022-11-16 12:03:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:24,191 INFO L495 AbstractCegarLoop]: Abstraction has 4440 states and 6462 transitions. [2022-11-16 12:03:24,191 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 12:03:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 4440 states and 6462 transitions. [2022-11-16 12:03:24,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 12:03:24,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:24,194 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 12:03:24,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:03:24,194 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1443448740, now seen corresponding path program 1 times [2022-11-16 12:03:24,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:24,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256159047] [2022-11-16 12:03:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:24,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:24,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:03:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:24,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:03:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:24,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:03:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:24,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:03:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:24,771 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 12:03:24,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:24,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256159047] [2022-11-16 12:03:24,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256159047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:03:24,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:03:24,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:03:24,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847489801] [2022-11-16 12:03:24,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:03:24,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:03:24,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:24,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:03:24,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:03:24,777 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 12:03:26,823 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 12:03:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:35,105 INFO L93 Difference]: Finished difference Result 11899 states and 17751 transitions. [2022-11-16 12:03:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:03:35,107 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 12:03:35,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:35,184 INFO L225 Difference]: With dead ends: 11899 [2022-11-16 12:03:35,184 INFO L226 Difference]: Without dead ends: 10790 [2022-11-16 12:03:35,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 12:03:35,197 INFO L413 NwaCegarLoop]: 2184 mSDtfsCounter, 2380 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 1873 mSolverCounterSat, 857 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2671 SdHoareTripleChecker+Valid, 4077 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 1873 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:35,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2671 Valid, 4077 Invalid, 2731 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [857 Valid, 1873 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2022-11-16 12:03:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10790 states. [2022-11-16 12:03:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10790 to 7732. [2022-11-16 12:03:35,697 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 12:03:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7732 states to 7732 states and 11255 transitions. [2022-11-16 12:03:35,739 INFO L78 Accepts]: Start accepts. Automaton has 7732 states and 11255 transitions. Word has length 36 [2022-11-16 12:03:35,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:35,740 INFO L495 AbstractCegarLoop]: Abstraction has 7732 states and 11255 transitions. [2022-11-16 12:03:35,741 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 12:03:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 7732 states and 11255 transitions. [2022-11-16 12:03:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 12:03:35,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:35,750 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 12:03:35,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:03:35,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:35,751 INFO L85 PathProgramCache]: Analyzing trace with hash 425142564, now seen corresponding path program 1 times [2022-11-16 12:03:35,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:35,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55686554] [2022-11-16 12:03:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:35,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:38,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:03:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:38,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:03:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:38,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:03:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:39,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:03:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:39,293 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 12:03:39,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:39,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55686554] [2022-11-16 12:03:39,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55686554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:03:39,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:03:39,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:03:39,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214826980] [2022-11-16 12:03:39,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:03:39,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:03:39,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:39,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:03:39,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:03:39,296 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 12:03:41,347 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 12:04:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:18,434 INFO L93 Difference]: Finished difference Result 22161 states and 33021 transitions. [2022-11-16 12:04:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:04:18,435 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 12:04:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:18,568 INFO L225 Difference]: With dead ends: 22161 [2022-11-16 12:04:18,568 INFO L226 Difference]: Without dead ends: 16710 [2022-11-16 12:04:18,605 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 12:04:18,606 INFO L413 NwaCegarLoop]: 2425 mSDtfsCounter, 3193 mSDsluCounter, 22640 mSDsCounter, 0 mSdLazyCounter, 14582 mSolverCounterSat, 1339 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 25065 SdHoareTripleChecker+Invalid, 15922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1339 IncrementalHoareTripleChecker+Valid, 14582 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:18,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 25065 Invalid, 15922 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1339 Valid, 14582 Invalid, 1 Unknown, 0 Unchecked, 36.7s Time] [2022-11-16 12:04:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16710 states. [2022-11-16 12:04:19,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16710 to 11058. [2022-11-16 12:04:19,617 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 12:04:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11058 states to 11058 states and 16093 transitions. [2022-11-16 12:04:19,678 INFO L78 Accepts]: Start accepts. Automaton has 11058 states and 16093 transitions. Word has length 38 [2022-11-16 12:04:19,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:19,679 INFO L495 AbstractCegarLoop]: Abstraction has 11058 states and 16093 transitions. [2022-11-16 12:04:19,679 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 12:04:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 11058 states and 16093 transitions. [2022-11-16 12:04:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 12:04:19,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:19,682 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 12:04:19,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:04:19,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:19,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1766277677, now seen corresponding path program 1 times [2022-11-16 12:04:19,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:19,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006997066] [2022-11-16 12:04:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:19,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:23,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:04:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:23,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:04:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:24,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:04:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:24,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:04:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:24,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:04:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:24,746 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 12:04:24,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:24,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006997066] [2022-11-16 12:04:24,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006997066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:24,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:24,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 12:04:24,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243868570] [2022-11-16 12:04:24,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:24,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:04:24,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:24,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:04:24,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:04:24,749 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 12:04:26,798 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 12:05:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:08,502 INFO L93 Difference]: Finished difference Result 17505 states and 26182 transitions. [2022-11-16 12:05:08,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:05:08,502 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 12:05:08,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:08,615 INFO L225 Difference]: With dead ends: 17505 [2022-11-16 12:05:08,615 INFO L226 Difference]: Without dead ends: 16433 [2022-11-16 12:05:08,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:05:08,633 INFO L413 NwaCegarLoop]: 1746 mSDtfsCounter, 4038 mSDsluCounter, 18426 mSDsCounter, 0 mSdLazyCounter, 15568 mSolverCounterSat, 1694 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.0s 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, 40.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:08,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4325 Valid, 20172 Invalid, 17263 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1694 Valid, 15568 Invalid, 1 Unknown, 0 Unchecked, 40.7s Time] [2022-11-16 12:05:08,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16433 states. [2022-11-16 12:05:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16433 to 9994. [2022-11-16 12:05:09,859 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 12:05:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9994 states to 9994 states and 14530 transitions. [2022-11-16 12:05:09,910 INFO L78 Accepts]: Start accepts. Automaton has 9994 states and 14530 transitions. Word has length 45 [2022-11-16 12:05:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:09,914 INFO L495 AbstractCegarLoop]: Abstraction has 9994 states and 14530 transitions. [2022-11-16 12:05:09,915 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 12:05:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 9994 states and 14530 transitions. [2022-11-16 12:05:09,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 12:05:09,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:09,922 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 12:05:09,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:05:09,927 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:05:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:09,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1433601597, now seen corresponding path program 1 times [2022-11-16 12:05:09,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:09,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451683776] [2022-11-16 12:05:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:09,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:10,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:05:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:10,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:05:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:10,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:05:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:10,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:05:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:10,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:05:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:10,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-16 12:05:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:10,525 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 12:05:10,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:10,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451683776] [2022-11-16 12:05:10,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451683776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:10,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:10,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:05:10,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737347115] [2022-11-16 12:05:10,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:10,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:05:10,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:10,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:05:10,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:05:10,533 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 12:05:12,579 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 12:05:14,618 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 12:05:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:23,044 INFO L93 Difference]: Finished difference Result 14859 states and 22209 transitions. [2022-11-16 12:05:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:05:23,045 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 12:05:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:23,130 INFO L225 Difference]: With dead ends: 14859 [2022-11-16 12:05:23,131 INFO L226 Difference]: Without dead ends: 14838 [2022-11-16 12:05:23,138 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 12:05:23,139 INFO L413 NwaCegarLoop]: 2141 mSDtfsCounter, 2596 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 658 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2884 SdHoareTripleChecker+Valid, 4508 SdHoareTripleChecker+Invalid, 2755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 658 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:23,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2884 Valid, 4508 Invalid, 2755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [658 Valid, 2095 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2022-11-16 12:05:23,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14838 states. [2022-11-16 12:05:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14838 to 7822. [2022-11-16 12:05:24,180 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 12:05:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7822 states to 7822 states and 11353 transitions. [2022-11-16 12:05:24,219 INFO L78 Accepts]: Start accepts. Automaton has 7822 states and 11353 transitions. Word has length 52 [2022-11-16 12:05:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:24,221 INFO L495 AbstractCegarLoop]: Abstraction has 7822 states and 11353 transitions. [2022-11-16 12:05:24,221 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 12:05:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 7822 states and 11353 transitions. [2022-11-16 12:05:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 12:05:24,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:24,225 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 12:05:24,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:05:24,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:05:24,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:24,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1376041650, now seen corresponding path program 1 times [2022-11-16 12:05:24,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:24,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188007034] [2022-11-16 12:05:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:24,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:26,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:05:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:26,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:05:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:26,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:05:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:26,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:05:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:26,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:05:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:26,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-16 12:05:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:26,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:05:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:05:26,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:26,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188007034] [2022-11-16 12:05:26,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188007034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:26,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084692696] [2022-11-16 12:05:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:26,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:26,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:26,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:26,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:05:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:37,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 2376 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:05:37,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:38,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:38,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084692696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:38,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:05:38,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 20 [2022-11-16 12:05:38,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837086189] [2022-11-16 12:05:38,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:38,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:05:38,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:38,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:05:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:05:38,681 INFO L87 Difference]: Start difference. First operand 7822 states and 11353 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 12:05:40,723 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 12:05:42,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:44,788 WARN L539 Checker$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 12:05:46,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:48,832 WARN L539 Checker$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 12:05:50,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:52,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:06:08,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:08,132 INFO L93 Difference]: Finished difference Result 10512 states and 15372 transitions. [2022-11-16 12:06:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:06:08,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2022-11-16 12:06:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:08,165 INFO L225 Difference]: With dead ends: 10512 [2022-11-16 12:06:08,166 INFO L226 Difference]: Without dead ends: 6127 [2022-11-16 12:06:08,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:06:08,185 INFO L413 NwaCegarLoop]: 2032 mSDtfsCounter, 2201 mSDsluCounter, 9275 mSDsCounter, 0 mSdLazyCounter, 5085 mSolverCounterSat, 123 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2324 SdHoareTripleChecker+Valid, 11307 SdHoareTripleChecker+Invalid, 5215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 5085 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:08,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2324 Valid, 11307 Invalid, 5215 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [123 Valid, 5085 Invalid, 7 Unknown, 0 Unchecked, 27.9s Time] [2022-11-16 12:06:08,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6127 states. [2022-11-16 12:06:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6127 to 5584. [2022-11-16 12:06:09,077 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 12:06:09,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5584 states to 5584 states and 8104 transitions. [2022-11-16 12:06:09,104 INFO L78 Accepts]: Start accepts. Automaton has 5584 states and 8104 transitions. Word has length 53 [2022-11-16 12:06:09,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:09,104 INFO L495 AbstractCegarLoop]: Abstraction has 5584 states and 8104 transitions. [2022-11-16 12:06:09,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 12:06:09,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5584 states and 8104 transitions. [2022-11-16 12:06:09,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 12:06:09,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:09,107 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 12:06:09,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:09,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ef9828-1f75-4292-92f4-11b1569e0221/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:09,307 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:09,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:09,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1420066383, now seen corresponding path program 1 times [2022-11-16 12:06:09,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:09,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103556305] [2022-11-16 12:06:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:09,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:09,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:06:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:09,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:06:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:09,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:06:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:09,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:06:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:09,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:06:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:09,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-16 12:06:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:10,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 12:06:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:10,018 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 12:06:10,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:10,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103556305] [2022-11-16 12:06:10,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103556305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:10,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:10,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:06:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234422073] [2022-11-16 12:06:10,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:10,022 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 12:06:12,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:06:14,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:06:42,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:42,909 INFO L93 Difference]: Finished difference Result 8950 states and 13472 transitions. [2022-11-16 12:06:42,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:06:42,910 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 12:06:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:42,946 INFO L225 Difference]: With dead ends: 8950 [2022-11-16 12:06:42,947 INFO L226 Difference]: Without dead ends: 7858 [2022-11-16 12:06:42,955 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 12:06:42,956 INFO L413 NwaCegarLoop]: 1183 mSDtfsCounter, 3099 mSDsluCounter, 3678 mSDsCounter, 0 mSdLazyCounter, 9597 mSolverCounterSat, 1698 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3337 SdHoareTripleChecker+Valid, 4861 SdHoareTripleChecker+Invalid, 11297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1698 IncrementalHoareTripleChecker+Valid, 9597 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:42,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3337 Valid, 4861 Invalid, 11297 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1698 Valid, 9597 Invalid, 2 Unknown, 0 Unchecked, 31.3s Time] [2022-11-16 12:06:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7858 states. [2022-11-16 12:06:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7858 to 5573. [2022-11-16 12:06:43,646 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 12:06:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5573 states to 5573 states and 8086 transitions. [2022-11-16 12:06:43,670 INFO L78 Accepts]: Start accepts. Automaton has 5573 states and 8086 transitions. Word has length 64 [2022-11-16 12:06:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:43,671 INFO L495 AbstractCegarLoop]: Abstraction has 5573 states and 8086 transitions. [2022-11-16 12:06:43,671 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 12:06:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 5573 states and 8086 transitions. [2022-11-16 12:06:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 12:06:43,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:43,673 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 12:06:43,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:06:43,673 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:43,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1593238031, now seen corresponding path program 1 times [2022-11-16 12:06:43,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:43,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751466511] [2022-11-16 12:06:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:43,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:44,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:06:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:44,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:06:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:44,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:06:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:44,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:06:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:44,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:06:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:44,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:06:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:44,277 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 12:06:44,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:44,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751466511] [2022-11-16 12:06:44,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751466511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:44,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:44,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:06:44,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447764897] [2022-11-16 12:06:44,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:44,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:06:44,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:06:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:06:44,281 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 12:06:46,321 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 12:06:57,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:57,713 INFO L93 Difference]: Finished difference Result 8219 states and 12227 transitions. [2022-11-16 12:06:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:06:57,714 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 12:06:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:57,738 INFO L225 Difference]: With dead ends: 8219 [2022-11-16 12:06:57,738 INFO L226 Difference]: Without dead ends: 4931 [2022-11-16 12:06:57,750 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 12:06:57,751 INFO L413 NwaCegarLoop]: 1510 mSDtfsCounter, 1730 mSDsluCounter, 5246 mSDsCounter, 0 mSdLazyCounter, 3932 mSolverCounterSat, 936 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 6756 SdHoareTripleChecker+Invalid, 4869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 3932 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:57,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1924 Valid, 6756 Invalid, 4869 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [936 Valid, 3932 Invalid, 1 Unknown, 0 Unchecked, 12.3s Time] [2022-11-16 12:06:57,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2022-11-16 12:06:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 3415. [2022-11-16 12:06:58,234 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 12:06:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 4918 transitions. [2022-11-16 12:06:58,313 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 4918 transitions. Word has length 63 [2022-11-16 12:06:58,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:58,314 INFO L495 AbstractCegarLoop]: Abstraction has 3415 states and 4918 transitions. [2022-11-16 12:06:58,314 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 12:06:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 4918 transitions. [2022-11-16 12:06:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 12:06:58,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:58,315 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 12:06:58,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:06:58,315 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:58,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:58,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1156470027, now seen corresponding path program 1 times [2022-11-16 12:06:58,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:58,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809266791] [2022-11-16 12:06:58,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:58,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:58,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:06:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:58,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:06:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:58,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:06:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:59,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:06:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:59,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:06:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:59,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:06:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:59,021 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 12:06:59,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:59,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809266791] [2022-11-16 12:06:59,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809266791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:59,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:59,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:06:59,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968745954] [2022-11-16 12:06:59,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:59,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:59,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:59,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:59,025 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 12:07:01,067 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 12:07:09,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:09,503 INFO L93 Difference]: Finished difference Result 4415 states and 6584 transitions. [2022-11-16 12:07:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:07:09,503 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 12:07:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:09,517 INFO L225 Difference]: With dead ends: 4415 [2022-11-16 12:07:09,517 INFO L226 Difference]: Without dead ends: 4410 [2022-11-16 12:07:09,519 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 12:07:09,520 INFO L413 NwaCegarLoop]: 1725 mSDtfsCounter, 1356 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 2758 mSolverCounterSat, 624 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 5998 SdHoareTripleChecker+Invalid, 3383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 2758 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:09,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1545 Valid, 5998 Invalid, 3383 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [624 Valid, 2758 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2022-11-16 12:07:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2022-11-16 12:07:10,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 3409. [2022-11-16 12:07:10,142 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 12:07:10,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 4910 transitions. [2022-11-16 12:07:10,150 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 4910 transitions. Word has length 66 [2022-11-16 12:07:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:10,151 INFO L495 AbstractCegarLoop]: Abstraction has 3409 states and 4910 transitions. [2022-11-16 12:07:10,151 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 12:07:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 4910 transitions. [2022-11-16 12:07:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 12:07:10,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:10,153 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 12:07:10,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:07:10,153 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:10,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:10,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1600126701, now seen corresponding path program 1 times [2022-11-16 12:07:10,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:10,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244288966] [2022-11-16 12:07:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:10,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:10,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:07:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:10,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:07:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:10,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:07:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:10,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:07:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:10,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:07:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:10,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:07:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:10,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:07:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:10,942 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 12:07:10,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:10,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244288966] [2022-11-16 12:07:10,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244288966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:10,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:10,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:07:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645398428] [2022-11-16 12:07:10,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:10,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:07:10,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:10,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:07:10,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:07:10,946 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 12:07:12,985 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 12:07:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:23,973 INFO L93 Difference]: Finished difference Result 6576 states and 9732 transitions. [2022-11-16 12:07:23,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:07:23,973 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 12:07:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:23,988 INFO L225 Difference]: With dead ends: 6576 [2022-11-16 12:07:23,988 INFO L226 Difference]: Without dead ends: 4398 [2022-11-16 12:07:23,994 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 12:07:23,995 INFO L413 NwaCegarLoop]: 2079 mSDtfsCounter, 1590 mSDsluCounter, 6688 mSDsCounter, 0 mSdLazyCounter, 3956 mSolverCounterSat, 751 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1781 SdHoareTripleChecker+Valid, 8767 SdHoareTripleChecker+Invalid, 4708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 3956 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:23,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1781 Valid, 8767 Invalid, 4708 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [751 Valid, 3956 Invalid, 1 Unknown, 0 Unchecked, 12.0s Time] [2022-11-16 12:07:24,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4398 states. [2022-11-16 12:07:24,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4398 to 3390. [2022-11-16 12:07:24,583 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 12:07:24,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3390 states to 3390 states and 4885 transitions. [2022-11-16 12:07:24,596 INFO L78 Accepts]: Start accepts. Automaton has 3390 states and 4885 transitions. Word has length 69 [2022-11-16 12:07:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:24,597 INFO L495 AbstractCegarLoop]: Abstraction has 3390 states and 4885 transitions. [2022-11-16 12:07:24,597 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 12:07:24,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3390 states and 4885 transitions. [2022-11-16 12:07:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 12:07:24,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:24,600 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 12:07:24,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:07:24,601 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:24,601 INFO L85 PathProgramCache]: Analyzing trace with hash -838499144, now seen corresponding path program 1 times [2022-11-16 12:07:24,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:24,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582557193] [2022-11-16 12:07:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:24,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:25,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:07:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:25,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:07:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:25,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:07:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:25,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:07:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:25,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:07:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:25,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-16 12:07:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:25,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:07:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:25,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:07:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:25,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-16 12:07:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:25,462 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 12:07:25,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:25,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582557193] [2022-11-16 12:07:25,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582557193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:25,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:25,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:07:25,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197424699] [2022-11-16 12:07:25,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:25,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:07:25,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:25,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:07:25,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:25,465 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 12:07:27,505 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 12:07:29,551 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 12:08:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:00,465 INFO L93 Difference]: Finished difference Result 4971 states and 7289 transitions. [2022-11-16 12:08:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:08:00,471 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 12:08:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:00,481 INFO L225 Difference]: With dead ends: 4971 [2022-11-16 12:08:00,482 INFO L226 Difference]: Without dead ends: 2797 [2022-11-16 12:08:00,486 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 12:08:00,487 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 1656 mSDsluCounter, 2701 mSDsCounter, 0 mSdLazyCounter, 11528 mSolverCounterSat, 768 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 3195 SdHoareTripleChecker+Invalid, 12298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 11528 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:00,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1783 Valid, 3195 Invalid, 12298 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [768 Valid, 11528 Invalid, 2 Unknown, 0 Unchecked, 33.8s Time] [2022-11-16 12:08:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-11-16 12:08:00,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2234. [2022-11-16 12:08:00,791 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 12:08:00,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 3226 transitions. [2022-11-16 12:08:00,797 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 3226 transitions. Word has length 71 [2022-11-16 12:08:00,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:00,798 INFO L495 AbstractCegarLoop]: Abstraction has 2234 states and 3226 transitions. [2022-11-16 12:08:00,798 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 12:08:00,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 3226 transitions. [2022-11-16 12:08:00,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 12:08:00,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:00,799 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 12:08:00,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:08:00,800 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1620541591, now seen corresponding path program 1 times [2022-11-16 12:08:00,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:00,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556676956] [2022-11-16 12:08:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:00,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:01,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:08:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:01,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:08:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:01,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:08:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:01,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:01,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:08:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:01,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:08:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:01,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 12:08:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:01,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:08:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:01,979 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 12:08:01,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:01,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556676956] [2022-11-16 12:08:01,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556676956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:01,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:08:01,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-16 12:08:01,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980713668] [2022-11-16 12:08:01,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:01,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:08:01,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:01,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:08:01,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:08:01,982 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 12:08:04,022 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 12:08:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:18,151 INFO L93 Difference]: Finished difference Result 2486 states and 3643 transitions. [2022-11-16 12:08:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:08:18,152 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 12:08:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:18,156 INFO L225 Difference]: With dead ends: 2486 [2022-11-16 12:08:18,156 INFO L226 Difference]: Without dead ends: 1418 [2022-11-16 12:08:18,159 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 12:08:18,160 INFO L413 NwaCegarLoop]: 1242 mSDtfsCounter, 930 mSDsluCounter, 8786 mSDsCounter, 0 mSdLazyCounter, 5913 mSolverCounterSat, 309 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 10028 SdHoareTripleChecker+Invalid, 6223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 5913 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:18,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 10028 Invalid, 6223 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [309 Valid, 5913 Invalid, 1 Unknown, 0 Unchecked, 15.5s Time] [2022-11-16 12:08:18,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-11-16 12:08:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1169. [2022-11-16 12:08:18,380 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 12:08:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1666 transitions. [2022-11-16 12:08:18,385 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1666 transitions. Word has length 77 [2022-11-16 12:08:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:18,385 INFO L495 AbstractCegarLoop]: Abstraction has 1169 states and 1666 transitions. [2022-11-16 12:08:18,385 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 12:08:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1666 transitions. [2022-11-16 12:08:18,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 12:08:18,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:18,387 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 12:08:18,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:08:18,387 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:18,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:18,388 INFO L85 PathProgramCache]: Analyzing trace with hash -625921759, now seen corresponding path program 1 times [2022-11-16 12:08:18,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:18,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133875471] [2022-11-16 12:08:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:18,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:18,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:08:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:18,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:08:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:18,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:08:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:18,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:18,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:08:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:18,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:08:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:18,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-16 12:08:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:18,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:08:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:18,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-16 12:08:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:18,850 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 12:08:18,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:18,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133875471] [2022-11-16 12:08:18,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133875471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:18,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:08:18,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:08:18,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036272338] [2022-11-16 12:08:18,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:18,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:08:18,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:08:18,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:08:18,854 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 12:08:20,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:08:22,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:08:25,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:08:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:33,612 INFO L93 Difference]: Finished difference Result 1420 states and 2082 transitions. [2022-11-16 12:08:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:08:33,612 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 12:08:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:33,616 INFO L225 Difference]: With dead ends: 1420 [2022-11-16 12:08:33,616 INFO L226 Difference]: Without dead ends: 1385 [2022-11-16 12:08:33,617 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 12:08:33,617 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 2663 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 1368 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2776 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 3742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1368 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:33,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2776 Valid, 996 Invalid, 3742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1368 Valid, 2371 Invalid, 3 Unknown, 0 Unchecked, 14.3s Time] [2022-11-16 12:08:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-11-16 12:08:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1136. [2022-11-16 12:08:33,743 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 12:08:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1630 transitions. [2022-11-16 12:08:33,745 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1630 transitions. Word has length 79 [2022-11-16 12:08:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:33,746 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1630 transitions. [2022-11-16 12:08:33,746 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 12:08:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1630 transitions. [2022-11-16 12:08:33,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 12:08:33,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:33,747 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 12:08:33,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:08:33,747 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:33,748 INFO L85 PathProgramCache]: Analyzing trace with hash -78145788, now seen corresponding path program 1 times [2022-11-16 12:08:33,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:33,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80615749] [2022-11-16 12:08:33,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:33,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:34,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:08:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:34,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:08:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:34,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:08:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:34,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:08:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:34,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-16 12:08:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:34,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:08:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:34,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:08:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:34,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-16 12:08:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:34,074 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 12:08:34,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:34,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80615749] [2022-11-16 12:08:34,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80615749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:34,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:08:34,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:08:34,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924834629] [2022-11-16 12:08:34,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:34,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:08:34,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:34,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:08:34,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:08:34,077 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 12:08:36,119 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 12:08:38,124 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 12:08:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:41,703 INFO L93 Difference]: Finished difference Result 1385 states and 2045 transitions. [2022-11-16 12:08:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:08:41,703 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 12:08:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:41,704 INFO L225 Difference]: With dead ends: 1385 [2022-11-16 12:08:41,704 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 12:08:41,707 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 12:08:41,708 INFO L413 NwaCegarLoop]: 1422 mSDtfsCounter, 1972 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 598 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2174 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:41,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2174 Valid, 2143 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 753 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2022-11-16 12:08:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 12:08:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 12:08:41,709 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 12:08:41,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 12:08:41,710 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2022-11-16 12:08:41,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:41,710 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 12:08:41,710 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 12:08:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 12:08:41,718 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 12:08:41,720 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 12:08:41,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:08:41,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-16 12:09:08,923 WARN L233 SmtUtils]: Spent 26.88s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:09:34,052 WARN L233 SmtUtils]: Spent 25.13s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:09:59,905 WARN L233 SmtUtils]: Spent 25.73s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:10:26,729 WARN L233 SmtUtils]: Spent 26.82s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:10:54,032 WARN L233 SmtUtils]: Spent 27.26s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:11:29,030 WARN L233 SmtUtils]: Spent 34.99s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:12:05,203 WARN L233 SmtUtils]: Spent 36.13s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:12:37,440 WARN L233 SmtUtils]: Spent 32.23s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:13:07,024 WARN L233 SmtUtils]: Spent 29.55s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:13:39,366 WARN L233 SmtUtils]: Spent 32.34s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:14:12,027 WARN L233 SmtUtils]: Spent 32.63s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:14:43,318 WARN L233 SmtUtils]: Spent 31.22s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:15:13,501 WARN L233 SmtUtils]: Spent 30.18s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:15:42,162 WARN L233 SmtUtils]: Spent 28.65s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-16 12:16:10,154 WARN L233 SmtUtils]: Spent 27.99s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)