./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/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_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:19:01,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:19:01,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:19:01,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:19:01,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:19:01,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:19:01,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:19:01,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:19:01,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:19:01,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:19:01,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:19:01,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:19:01,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:19:01,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:19:01,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:19:01,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:19:01,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:19:01,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:19:01,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:19:01,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:19:01,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:19:01,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:19:01,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:19:01,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:19:01,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:19:01,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:19:01,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:19:01,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:19:01,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:19:01,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:19:01,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:19:01,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:19:01,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:19:01,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:19:01,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:19:01,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:19:01,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:19:01,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:19:01,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:19:01,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:19:01,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:19:01,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 18:19:01,647 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:19:01,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:19:01,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:19:01,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:19:01,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:19:01,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:19:01,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:19:01,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:19:01,650 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:19:01,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:19:01,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:19:01,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:19:01,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:19:01,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:19:01,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:19:01,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:19:01,652 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:19:01,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:19:01,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:19:01,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:19:01,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:19:01,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:19:01,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:19:01,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:19:01,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:19:01,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:19:01,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:19:01,655 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:19:01,655 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:19:01,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:19:01,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:19:01,656 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_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 [2021-11-13 18:19:01,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:19:02,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:19:02,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:19:02,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:19:02,020 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:19:02,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-11-13 18:19:02,097 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/data/0100336ce/372b37ac0d6045218fcc9a2b939ea3b7/FLAG9ed64cca7 [2021-11-13 18:19:03,029 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:19:03,030 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-11-13 18:19:03,088 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/data/0100336ce/372b37ac0d6045218fcc9a2b939ea3b7/FLAG9ed64cca7 [2021-11-13 18:19:03,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/data/0100336ce/372b37ac0d6045218fcc9a2b939ea3b7 [2021-11-13 18:19:03,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:19:03,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:19:03,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:19:03,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:19:03,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:19:03,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:19:03" (1/1) ... [2021-11-13 18:19:03,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@445362e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:03, skipping insertion in model container [2021-11-13 18:19:03,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:19:03" (1/1) ... [2021-11-13 18:19:03,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:19:03,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:19:05,258 WARN L228 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_6e51135c-6116-4c05-aca3-2c5c630ef827/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2021-11-13 18:19:05,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:19:05,385 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:19:05,773 WARN L228 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_6e51135c-6116-4c05-aca3-2c5c630ef827/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2021-11-13 18:19:05,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:19:05,924 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:19:05,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:05 WrapperNode [2021-11-13 18:19:05,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:19:05,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:19:05,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:19:05,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:19:05,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:05" (1/1) ... [2021-11-13 18:19:06,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:05" (1/1) ... [2021-11-13 18:19:06,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:19:06,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:19:06,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:19:06,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:19:06,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:05" (1/1) ... [2021-11-13 18:19:06,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:05" (1/1) ... [2021-11-13 18:19:06,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:05" (1/1) ... [2021-11-13 18:19:06,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:05" (1/1) ... [2021-11-13 18:19:06,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:05" (1/1) ... [2021-11-13 18:19:06,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:05" (1/1) ... [2021-11-13 18:19:06,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:05" (1/1) ... [2021-11-13 18:19:06,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:19:06,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:19:06,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:19:06,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:19:06,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:05" (1/1) ... [2021-11-13 18:19:06,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:19:06,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:19:06,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:19:06,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:19:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-11-13 18:19:06,646 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-11-13 18:19:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-13 18:19:06,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-13 18:19:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-13 18:19:06,647 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-13 18:19:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-13 18:19:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 18:19:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 18:19:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:19:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-11-13 18:19:06,648 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-11-13 18:19:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-11-13 18:19:06,648 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-11-13 18:19:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 18:19:06,648 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 18:19:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-11-13 18:19:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-11-13 18:19:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-11-13 18:19:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-11-13 18:19:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-13 18:19:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-13 18:19:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:19:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:19:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-11-13 18:19:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-11-13 18:19:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2021-11-13 18:19:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2021-11-13 18:19:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-11-13 18:19:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-11-13 18:19:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-11-13 18:19:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-11-13 18:19:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-11-13 18:19:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-11-13 18:19:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-11-13 18:19:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-11-13 18:19:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-11-13 18:19:06,652 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-11-13 18:19:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:19:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 18:19:06,653 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 18:19:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:19:06,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:19:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-11-13 18:19:06,653 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-11-13 18:19:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-11-13 18:19:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-11-13 18:19:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-11-13 18:19:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-11-13 18:19:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-13 18:19:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-13 18:19:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:19:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:19:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-11-13 18:19:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-11-13 18:19:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:19:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-13 18:19:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-11-13 18:19:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-11-13 18:19:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-11-13 18:19:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-13 18:19:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-13 18:19:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-11-13 18:19:06,659 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-11-13 18:19:06,659 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-13 18:19:06,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-13 18:19:06,659 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-11-13 18:19:06,659 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-11-13 18:19:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-11-13 18:19:06,660 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-11-13 18:19:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:19:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:19:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-13 18:19:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-13 18:19:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-13 18:19:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-11-13 18:19:06,662 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-11-13 18:19:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-11-13 18:19:06,662 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-11-13 18:19:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:19:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-11-13 18:19:06,663 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-11-13 18:19:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-11-13 18:19:06,663 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-11-13 18:19:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-11-13 18:19:06,663 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-11-13 18:19:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-13 18:19:06,664 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-13 18:19:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-13 18:19:06,664 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-13 18:19:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-13 18:19:06,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-13 18:19:06,665 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-13 18:19:06,665 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-13 18:19:06,665 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-13 18:19:06,665 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-13 18:19:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-13 18:19:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-13 18:19:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-11-13 18:19:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-11-13 18:19:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:19:06,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:19:06,668 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-11-13 18:19:06,668 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-11-13 18:19:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-13 18:19:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-13 18:19:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-11-13 18:19:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-11-13 18:19:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-13 18:19:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-13 18:19:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-11-13 18:19:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-11-13 18:19:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-13 18:19:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-13 18:19:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-11-13 18:19:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-11-13 18:19:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 18:19:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 18:19:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-13 18:19:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-13 18:19:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-11-13 18:19:06,676 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-11-13 18:19:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-11-13 18:19:06,676 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-11-13 18:19:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-13 18:19:06,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-13 18:19:06,678 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-13 18:19:06,678 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-13 18:19:06,678 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-11-13 18:19:06,684 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-11-13 18:19:06,685 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-13 18:19:06,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-13 18:19:06,685 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-11-13 18:19:06,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-11-13 18:19:06,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:19:06,685 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-13 18:19:06,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-13 18:19:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-13 18:19:06,686 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-13 18:19:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-13 18:19:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-13 18:19:06,686 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-13 18:19:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-13 18:19:06,686 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-13 18:19:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:19:06,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:19:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-13 18:19:06,687 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-13 18:19:49,421 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:19:49,421 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:19:49,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:19:49 BoogieIcfgContainer [2021-11-13 18:19:49,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:19:49,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:19:49,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:19:49,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:19:49,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:19:03" (1/3) ... [2021-11-13 18:19:49,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54fc8cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:19:49, skipping insertion in model container [2021-11-13 18:19:49,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:05" (2/3) ... [2021-11-13 18:19:49,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54fc8cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:19:49, skipping insertion in model container [2021-11-13 18:19:49,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:19:49" (3/3) ... [2021-11-13 18:19:49,435 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2021-11-13 18:19:49,441 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:19:49,441 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:19:49,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:19:49,514 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:19:49,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:19:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 1225 states, 841 states have (on average 1.375743162901308) internal successors, (1157), 881 states have internal predecessors, (1157), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) [2021-11-13 18:19:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:19:49,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:49,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:49,593 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:49,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:49,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1560528525, now seen corresponding path program 1 times [2021-11-13 18:19:49,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:49,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523150051] [2021-11-13 18:19:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:49,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:50,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:19:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:50,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:19:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:19:50,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:50,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523150051] [2021-11-13 18:19:50,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523150051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:50,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:50,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:19:50,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105924191] [2021-11-13 18:19:50,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:50,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:19:50,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:19:50,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:19:50,585 INFO L87 Difference]: Start difference. First operand has 1225 states, 841 states have (on average 1.375743162901308) internal successors, (1157), 881 states have internal predecessors, (1157), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:19:52,691 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:57,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:57,297 INFO L93 Difference]: Finished difference Result 3954 states and 5954 transitions. [2021-11-13 18:19:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:19:57,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-13 18:19:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:57,350 INFO L225 Difference]: With dead ends: 3954 [2021-11-13 18:19:57,350 INFO L226 Difference]: Without dead ends: 2729 [2021-11-13 18:19:57,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:19:57,374 INFO L933 BasicCegarLoop]: 2076 mSDtfsCounter, 2721 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 913 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5503.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3016 SdHoareTripleChecker+Valid, 4326 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 68.24ms SdHoareTripleChecker+Time, 913 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6244.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:57,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3016 Valid, 4326 Invalid, 2031 Unknown, 0 Unchecked, 68.24ms Time], IncrementalHoareTripleChecker [913 Valid, 1117 Invalid, 1 Unknown, 0 Unchecked, 6244.39ms Time] [2021-11-13 18:19:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-11-13 18:19:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2224. [2021-11-13 18:19:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1510 states have (on average 1.3543046357615893) internal successors, (2045), 1568 states have internal predecessors, (2045), 593 states have call successors, (593), 122 states have call predecessors, (593), 120 states have return successors, (584), 577 states have call predecessors, (584), 584 states have call successors, (584) [2021-11-13 18:19:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3222 transitions. [2021-11-13 18:19:57,675 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3222 transitions. Word has length 17 [2021-11-13 18:19:57,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:57,676 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3222 transitions. [2021-11-13 18:19:57,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:19:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3222 transitions. [2021-11-13 18:19:57,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:19:57,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:57,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:57,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:19:57,681 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:57,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:57,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1132781344, now seen corresponding path program 1 times [2021-11-13 18:19:57,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:57,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034013726] [2021-11-13 18:19:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:57,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:57,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:19:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:57,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:19:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:19:58,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:58,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034013726] [2021-11-13 18:19:58,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034013726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:58,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:58,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:19:58,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482140491] [2021-11-13 18:19:58,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:58,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:19:58,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:58,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:19:58,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:19:58,012 INFO L87 Difference]: Start difference. First operand 2224 states and 3222 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:20:00,074 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:05,093 INFO L93 Difference]: Finished difference Result 6504 states and 9632 transitions. [2021-11-13 18:20:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:20:05,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-13 18:20:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:05,171 INFO L225 Difference]: With dead ends: 6504 [2021-11-13 18:20:05,171 INFO L226 Difference]: Without dead ends: 5418 [2021-11-13 18:20:05,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:20:05,193 INFO L933 BasicCegarLoop]: 2799 mSDtfsCounter, 2384 mSDsluCounter, 2582 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 791 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5786.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2676 SdHoareTripleChecker+Valid, 5381 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 65.72ms SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6574.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:05,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2676 Valid, 5381 Invalid, 1929 Unknown, 0 Unchecked, 65.72ms Time], IncrementalHoareTripleChecker [791 Valid, 1137 Invalid, 1 Unknown, 0 Unchecked, 6574.28ms Time] [2021-11-13 18:20:05,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-11-13 18:20:05,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4408. [2021-11-13 18:20:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 2997 states have (on average 1.3546880213546881) internal successors, (4060), 3107 states have internal predecessors, (4060), 1171 states have call successors, (1171), 243 states have call predecessors, (1171), 239 states have return successors, (1159), 1145 states have call predecessors, (1159), 1159 states have call successors, (1159) [2021-11-13 18:20:05,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6390 transitions. [2021-11-13 18:20:05,570 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6390 transitions. Word has length 18 [2021-11-13 18:20:05,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:05,570 INFO L470 AbstractCegarLoop]: Abstraction has 4408 states and 6390 transitions. [2021-11-13 18:20:05,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:20:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6390 transitions. [2021-11-13 18:20:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:20:05,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:05,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:20:05,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:20:05,574 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:05,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:05,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1342676608, now seen corresponding path program 1 times [2021-11-13 18:20:05,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:05,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716223427] [2021-11-13 18:20:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:05,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:05,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:20:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:05,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:20:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:05,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 18:20:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:06,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:20:06,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:06,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716223427] [2021-11-13 18:20:06,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716223427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:06,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:06,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:20:06,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365823113] [2021-11-13 18:20:06,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:06,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:20:06,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:06,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:20:06,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:20:06,031 INFO L87 Difference]: Start difference. First operand 4408 states and 6390 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:20:08,097 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:13,224 INFO L93 Difference]: Finished difference Result 11851 states and 17589 transitions. [2021-11-13 18:20:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:20:13,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2021-11-13 18:20:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:13,357 INFO L225 Difference]: With dead ends: 11851 [2021-11-13 18:20:13,357 INFO L226 Difference]: Without dead ends: 10750 [2021-11-13 18:20:13,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:20:13,376 INFO L933 BasicCegarLoop]: 2258 mSDtfsCounter, 2626 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 902 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5807.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2918 SdHoareTripleChecker+Valid, 4409 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.84ms SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6629.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:13,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2918 Valid, 4409 Invalid, 2035 Unknown, 0 Unchecked, 53.84ms Time], IncrementalHoareTripleChecker [902 Valid, 1132 Invalid, 1 Unknown, 0 Unchecked, 6629.51ms Time] [2021-11-13 18:20:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-11-13 18:20:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 7676. [2021-11-13 18:20:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7676 states, 5224 states have (on average 1.354709035222052) internal successors, (7077), 5414 states have internal predecessors, (7077), 2033 states have call successors, (2033), 424 states have call predecessors, (2033), 418 states have return successors, (2019), 1991 states have call predecessors, (2019), 2019 states have call successors, (2019) [2021-11-13 18:20:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 11129 transitions. [2021-11-13 18:20:14,087 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 11129 transitions. Word has length 36 [2021-11-13 18:20:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:14,088 INFO L470 AbstractCegarLoop]: Abstraction has 7676 states and 11129 transitions. [2021-11-13 18:20:14,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:20:14,088 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 11129 transitions. [2021-11-13 18:20:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 18:20:14,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:14,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:20:14,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:20:14,099 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:14,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2327976, now seen corresponding path program 1 times [2021-11-13 18:20:14,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:14,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112872085] [2021-11-13 18:20:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:14,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:15,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:20:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:15,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:20:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:15,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:20:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:16,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:20:16,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:16,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112872085] [2021-11-13 18:20:16,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112872085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:16,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:16,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-13 18:20:16,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058268452] [2021-11-13 18:20:16,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:16,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:20:16,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:16,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:20:16,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:20:16,175 INFO L87 Difference]: Start difference. First operand 7676 states and 11129 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-13 18:20:18,274 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:34,115 INFO L93 Difference]: Finished difference Result 22061 states and 32715 transitions. [2021-11-13 18:20:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 18:20:34,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-11-13 18:20:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:34,299 INFO L225 Difference]: With dead ends: 22061 [2021-11-13 18:20:34,299 INFO L226 Difference]: Without dead ends: 16650 [2021-11-13 18:20:34,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:20:34,346 INFO L933 BasicCegarLoop]: 2612 mSDtfsCounter, 3303 mSDsluCounter, 24810 mSDsCounter, 0 mSdLazyCounter, 8553 mSolverCounterSat, 1476 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14475.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3602 SdHoareTripleChecker+Valid, 27422 SdHoareTripleChecker+Invalid, 10030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 173.63ms SdHoareTripleChecker+Time, 1476 IncrementalHoareTripleChecker+Valid, 8553 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16325.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:34,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3602 Valid, 27422 Invalid, 10030 Unknown, 0 Unchecked, 173.63ms Time], IncrementalHoareTripleChecker [1476 Valid, 8553 Invalid, 1 Unknown, 0 Unchecked, 16325.86ms Time] [2021-11-13 18:20:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16650 states. [2021-11-13 18:20:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16650 to 10978. [2021-11-13 18:20:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10978 states, 7469 states have (on average 1.3542642924086223) internal successors, (10115), 7739 states have internal predecessors, (10115), 2905 states have call successors, (2905), 610 states have call predecessors, (2905), 603 states have return successors, (2893), 2848 states have call predecessors, (2893), 2890 states have call successors, (2893) [2021-11-13 18:20:35,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10978 states to 10978 states and 15913 transitions. [2021-11-13 18:20:35,338 INFO L78 Accepts]: Start accepts. Automaton has 10978 states and 15913 transitions. Word has length 38 [2021-11-13 18:20:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:35,339 INFO L470 AbstractCegarLoop]: Abstraction has 10978 states and 15913 transitions. [2021-11-13 18:20:35,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-13 18:20:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10978 states and 15913 transitions. [2021-11-13 18:20:35,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 18:20:35,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:35,346 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:20:35,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:20:35,347 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:35,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1064452566, now seen corresponding path program 1 times [2021-11-13 18:20:35,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:35,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961972088] [2021-11-13 18:20:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:35,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:36,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:20:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:36,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:20:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:36,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:36,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:20:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:37,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:20:37,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:37,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961972088] [2021-11-13 18:20:37,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961972088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:37,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:37,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-13 18:20:37,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570523819] [2021-11-13 18:20:37,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:37,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:20:37,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:20:37,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:20:37,237 INFO L87 Difference]: Start difference. First operand 10978 states and 15913 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-13 18:20:39,308 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:56,018 INFO L93 Difference]: Finished difference Result 17437 states and 25948 transitions. [2021-11-13 18:20:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 18:20:56,027 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 45 [2021-11-13 18:20:56,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:56,135 INFO L225 Difference]: With dead ends: 17437 [2021-11-13 18:20:56,135 INFO L226 Difference]: Without dead ends: 16373 [2021-11-13 18:20:56,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:20:56,155 INFO L933 BasicCegarLoop]: 2297 mSDtfsCounter, 3981 mSDsluCounter, 23561 mSDsCounter, 0 mSdLazyCounter, 9539 mSolverCounterSat, 1829 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14733.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4266 SdHoareTripleChecker+Valid, 25858 SdHoareTripleChecker+Invalid, 11369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 155.77ms SdHoareTripleChecker+Time, 1829 IncrementalHoareTripleChecker+Valid, 9539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16919.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:56,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4266 Valid, 25858 Invalid, 11369 Unknown, 0 Unchecked, 155.77ms Time], IncrementalHoareTripleChecker [1829 Valid, 9539 Invalid, 1 Unknown, 0 Unchecked, 16919.12ms Time] [2021-11-13 18:20:56,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16373 states. [2021-11-13 18:20:56,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16373 to 9922. [2021-11-13 18:20:56,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9922 states, 6754 states have (on average 1.3532721350310928) internal successors, (9140), 6998 states have internal predecessors, (9140), 2620 states have call successors, (2620), 554 states have call predecessors, (2620), 547 states have return successors, (2608), 2567 states have call predecessors, (2608), 2605 states have call successors, (2608) [2021-11-13 18:20:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9922 states to 9922 states and 14368 transitions. [2021-11-13 18:20:57,045 INFO L78 Accepts]: Start accepts. Automaton has 9922 states and 14368 transitions. Word has length 45 [2021-11-13 18:20:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:57,047 INFO L470 AbstractCegarLoop]: Abstraction has 9922 states and 14368 transitions. [2021-11-13 18:20:57,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-13 18:20:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 9922 states and 14368 transitions. [2021-11-13 18:20:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 18:20:57,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:57,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:20:57,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:20:57,051 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash 575821089, now seen corresponding path program 1 times [2021-11-13 18:20:57,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:57,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742053412] [2021-11-13 18:20:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:57,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:57,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:20:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:57,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:20:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:57,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:20:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:57,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:57,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:20:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:57,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 18:20:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:20:57,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:57,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742053412] [2021-11-13 18:20:57,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742053412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:57,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:57,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:20:57,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464748510] [2021-11-13 18:20:57,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:57,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:20:57,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:57,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:20:57,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:20:57,360 INFO L87 Difference]: Start difference. First operand 9922 states and 14368 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:20:59,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:01,562 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:05,667 INFO L93 Difference]: Finished difference Result 14804 states and 22011 transitions. [2021-11-13 18:21:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:21:05,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 52 [2021-11-13 18:21:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:05,767 INFO L225 Difference]: With dead ends: 14804 [2021-11-13 18:21:05,768 INFO L226 Difference]: Without dead ends: 14783 [2021-11-13 18:21:05,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:21:05,777 INFO L933 BasicCegarLoop]: 3342 mSDtfsCounter, 2019 mSDsluCounter, 2643 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 669 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6777.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2303 SdHoareTripleChecker+Valid, 5985 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.68ms SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7592.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:05,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2303 Valid, 5985 Invalid, 1816 Unknown, 0 Unchecked, 26.68ms Time], IncrementalHoareTripleChecker [669 Valid, 1145 Invalid, 2 Unknown, 0 Unchecked, 7592.51ms Time] [2021-11-13 18:21:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14783 states. [2021-11-13 18:21:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14783 to 7766. [2021-11-13 18:21:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7766 states, 5290 states have (on average 1.3506616257088846) internal successors, (7145), 5482 states have internal predecessors, (7145), 2046 states have call successors, (2046), 436 states have call predecessors, (2046), 429 states have return successors, (2036), 2001 states have call predecessors, (2036), 2033 states have call successors, (2036) [2021-11-13 18:21:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 11227 transitions. [2021-11-13 18:21:06,569 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 11227 transitions. Word has length 52 [2021-11-13 18:21:06,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:06,570 INFO L470 AbstractCegarLoop]: Abstraction has 7766 states and 11227 transitions. [2021-11-13 18:21:06,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:21:06,570 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 11227 transitions. [2021-11-13 18:21:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-13 18:21:06,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:06,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:06,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:21:06,574 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:06,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:06,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1749749551, now seen corresponding path program 1 times [2021-11-13 18:21:06,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:06,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392636826] [2021-11-13 18:21:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:06,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:07,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:07,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:21:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:08,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:08,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:21:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:08,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:08,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 18:21:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:08,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:21:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:21:08,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:08,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392636826] [2021-11-13 18:21:08,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392636826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:21:08,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358767707] [2021-11-13 18:21:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:08,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:21:08,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:21:08,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:21:08,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:21:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:33,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 18:21:33,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:21:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:33,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:21:33,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358767707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:33,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:21:33,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 14 [2021-11-13 18:21:33,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014087802] [2021-11-13 18:21:33,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:33,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:21:33,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:33,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:21:33,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:21:33,837 INFO L87 Difference]: Start difference. First operand 7766 states and 11227 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) 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) [2021-11-13 18:21:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:34,796 INFO L93 Difference]: Finished difference Result 9905 states and 14340 transitions. [2021-11-13 18:21:34,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:21:34,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) 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 [2021-11-13 18:21:34,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:34,831 INFO L225 Difference]: With dead ends: 9905 [2021-11-13 18:21:34,832 INFO L226 Difference]: Without dead ends: 5552 [2021-11-13 18:21:34,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:21:34,856 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 263 mSDsluCounter, 7801 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 9438 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.69ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:34,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 9438 Invalid, 55 Unknown, 0 Unchecked, 18.69ms Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 107.12ms Time] [2021-11-13 18:21:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-11-13 18:21:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 5544. [2021-11-13 18:21:35,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5544 states, 3773 states have (on average 1.3501192684866155) internal successors, (5094), 3908 states have internal predecessors, (5094), 1462 states have call successors, (1462), 313 states have call predecessors, (1462), 308 states have return successors, (1458), 1432 states have call predecessors, (1458), 1455 states have call successors, (1458) [2021-11-13 18:21:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5544 states to 5544 states and 8014 transitions. [2021-11-13 18:21:35,449 INFO L78 Accepts]: Start accepts. Automaton has 5544 states and 8014 transitions. Word has length 53 [2021-11-13 18:21:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:35,450 INFO L470 AbstractCegarLoop]: Abstraction has 5544 states and 8014 transitions. [2021-11-13 18:21:35,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) 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) [2021-11-13 18:21:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5544 states and 8014 transitions. [2021-11-13 18:21:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 18:21:35,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:35,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:35,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 18:21:35,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e51135c-6116-4c05-aca3-2c5c630ef827/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 18:21:35,667 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:35,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:35,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1357667059, now seen corresponding path program 1 times [2021-11-13 18:21:35,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:35,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476223200] [2021-11-13 18:21:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:35,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:21:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:21:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:21:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:21:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:35,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:21:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:21:36,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:36,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476223200] [2021-11-13 18:21:36,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476223200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:36,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:36,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:21:36,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295184131] [2021-11-13 18:21:36,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:36,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:21:36,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:36,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:21:36,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:21:36,011 INFO L87 Difference]: Start difference. First operand 5544 states and 8014 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:21:38,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:40,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:52,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:52,803 INFO L93 Difference]: Finished difference Result 8917 states and 13364 transitions. [2021-11-13 18:21:52,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:21:52,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2021-11-13 18:21:52,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:52,858 INFO L225 Difference]: With dead ends: 8917 [2021-11-13 18:21:52,858 INFO L226 Difference]: Without dead ends: 7833 [2021-11-13 18:21:52,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:21:52,871 INFO L933 BasicCegarLoop]: 2294 mSDtfsCounter, 3107 mSDsluCounter, 5716 mSDsCounter, 0 mSdLazyCounter, 5880 mSolverCounterSat, 1734 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14350.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3344 SdHoareTripleChecker+Valid, 8010 SdHoareTripleChecker+Invalid, 7616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 76.70ms SdHoareTripleChecker+Time, 1734 IncrementalHoareTripleChecker+Valid, 5880 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15913.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:52,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3344 Valid, 8010 Invalid, 7616 Unknown, 0 Unchecked, 76.70ms Time], IncrementalHoareTripleChecker [1734 Valid, 5880 Invalid, 2 Unknown, 0 Unchecked, 15913.97ms Time] [2021-11-13 18:21:52,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2021-11-13 18:21:53,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 5533. [2021-11-13 18:21:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5533 states, 3767 states have (on average 1.349880541544996) internal successors, (5085), 3900 states have internal predecessors, (5085), 1457 states have call successors, (1457), 313 states have call predecessors, (1457), 308 states have return successors, (1454), 1429 states have call predecessors, (1454), 1451 states have call successors, (1454) [2021-11-13 18:21:53,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5533 states to 5533 states and 7996 transitions. [2021-11-13 18:21:53,588 INFO L78 Accepts]: Start accepts. Automaton has 5533 states and 7996 transitions. Word has length 64 [2021-11-13 18:21:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:53,589 INFO L470 AbstractCegarLoop]: Abstraction has 5533 states and 7996 transitions. [2021-11-13 18:21:53,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:21:53,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5533 states and 7996 transitions. [2021-11-13 18:21:53,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 18:21:53,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:53,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:53,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:21:53,592 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:53,592 INFO L85 PathProgramCache]: Analyzing trace with hash -723478224, now seen corresponding path program 1 times [2021-11-13 18:21:53,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:53,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395411853] [2021-11-13 18:21:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:53,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:54,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:54,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:21:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:54,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:21:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:54,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:54,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:21:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:54,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:21:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:21:54,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:54,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395411853] [2021-11-13 18:21:54,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395411853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:54,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:54,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:54,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225579529] [2021-11-13 18:21:54,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:54,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:54,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:54,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:54,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:54,284 INFO L87 Difference]: Start difference. First operand 5533 states and 7996 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:21:56,351 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:00,878 INFO L93 Difference]: Finished difference Result 8180 states and 12119 transitions. [2021-11-13 18:22:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:22:00,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2021-11-13 18:22:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:00,979 INFO L225 Difference]: With dead ends: 8180 [2021-11-13 18:22:00,980 INFO L226 Difference]: Without dead ends: 4916 [2021-11-13 18:22:00,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:22:00,997 INFO L933 BasicCegarLoop]: 2169 mSDtfsCounter, 1604 mSDsluCounter, 7611 mSDsCounter, 0 mSdLazyCounter, 2175 mSolverCounterSat, 941 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5374.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 9780 SdHoareTripleChecker+Invalid, 3117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.11ms SdHoareTripleChecker+Time, 941 IncrementalHoareTripleChecker+Valid, 2175 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6081.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:00,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1797 Valid, 9780 Invalid, 3117 Unknown, 0 Unchecked, 36.11ms Time], IncrementalHoareTripleChecker [941 Valid, 2175 Invalid, 1 Unknown, 0 Unchecked, 6081.58ms Time] [2021-11-13 18:22:01,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4916 states. [2021-11-13 18:22:01,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4916 to 3391. [2021-11-13 18:22:01,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 2314 states have (on average 1.3414001728608471) internal successors, (3104), 2393 states have internal predecessors, (3104), 881 states have call successors, (881), 198 states have call predecessors, (881), 195 states have return successors, (879), 865 states have call predecessors, (879), 876 states have call successors, (879) [2021-11-13 18:22:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 4864 transitions. [2021-11-13 18:22:01,401 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 4864 transitions. Word has length 63 [2021-11-13 18:22:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:01,401 INFO L470 AbstractCegarLoop]: Abstraction has 3391 states and 4864 transitions. [2021-11-13 18:22:01,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:22:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 4864 transitions. [2021-11-13 18:22:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 18:22:01,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:01,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:01,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:22:01,404 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:01,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1127472847, now seen corresponding path program 1 times [2021-11-13 18:22:01,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:01,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715245136] [2021-11-13 18:22:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:01,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:02,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:22:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:02,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:22:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:02,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:22:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:02,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:02,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:22:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:02,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:22:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:22:02,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:02,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715245136] [2021-11-13 18:22:02,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715245136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:02,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:22:02,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:22:02,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786977645] [2021-11-13 18:22:02,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:02,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:22:02,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:02,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:22:02,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:22:02,232 INFO L87 Difference]: Start difference. First operand 3391 states and 4864 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 18:22:04,293 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:08,929 INFO L93 Difference]: Finished difference Result 5728 states and 8516 transitions. [2021-11-13 18:22:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:22:08,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 66 [2021-11-13 18:22:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:08,955 INFO L225 Difference]: With dead ends: 5728 [2021-11-13 18:22:08,955 INFO L226 Difference]: Without dead ends: 4665 [2021-11-13 18:22:08,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:22:08,963 INFO L933 BasicCegarLoop]: 2059 mSDtfsCounter, 1572 mSDsluCounter, 6863 mSDsCounter, 0 mSdLazyCounter, 2171 mSolverCounterSat, 960 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5406.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1766 SdHoareTripleChecker+Valid, 8922 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.34ms SdHoareTripleChecker+Time, 960 IncrementalHoareTripleChecker+Valid, 2171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6156.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:08,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1766 Valid, 8922 Invalid, 3132 Unknown, 0 Unchecked, 36.34ms Time], IncrementalHoareTripleChecker [960 Valid, 2171 Invalid, 1 Unknown, 0 Unchecked, 6156.75ms Time] [2021-11-13 18:22:08,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4665 states. [2021-11-13 18:22:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4665 to 3388. [2021-11-13 18:22:09,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 2311 states have (on average 1.3405452185201212) internal successors, (3098), 2390 states have internal predecessors, (3098), 881 states have call successors, (881), 198 states have call predecessors, (881), 195 states have return successors, (879), 865 states have call predecessors, (879), 876 states have call successors, (879) [2021-11-13 18:22:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 4858 transitions. [2021-11-13 18:22:09,364 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 4858 transitions. Word has length 66 [2021-11-13 18:22:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:09,366 INFO L470 AbstractCegarLoop]: Abstraction has 3388 states and 4858 transitions. [2021-11-13 18:22:09,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 18:22:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 4858 transitions. [2021-11-13 18:22:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:22:09,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:09,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:09,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:22:09,369 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:09,369 INFO L85 PathProgramCache]: Analyzing trace with hash -964928150, now seen corresponding path program 1 times [2021-11-13 18:22:09,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:09,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132418637] [2021-11-13 18:22:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:09,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:09,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:22:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:09,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:22:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:09,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:22:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:09,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:09,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:22:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:09,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:22:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:09,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-13 18:22:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:22:09,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:09,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132418637] [2021-11-13 18:22:09,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132418637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:09,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:22:09,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:22:09,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286824947] [2021-11-13 18:22:09,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:09,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:22:09,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:09,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:22:09,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:22:09,688 INFO L87 Difference]: Start difference. First operand 3388 states and 4858 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:22:11,748 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:16,091 INFO L93 Difference]: Finished difference Result 6286 states and 9212 transitions. [2021-11-13 18:22:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:22:16,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-11-13 18:22:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:16,115 INFO L225 Difference]: With dead ends: 6286 [2021-11-13 18:22:16,115 INFO L226 Difference]: Without dead ends: 4124 [2021-11-13 18:22:16,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:22:16,129 INFO L933 BasicCegarLoop]: 2028 mSDtfsCounter, 1514 mSDsluCounter, 6545 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 812 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5259.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 8573 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.63ms SdHoareTripleChecker+Time, 812 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5957.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:16,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1592 Valid, 8573 Invalid, 2869 Unknown, 0 Unchecked, 34.63ms Time], IncrementalHoareTripleChecker [812 Valid, 2056 Invalid, 1 Unknown, 0 Unchecked, 5957.39ms Time] [2021-11-13 18:22:16,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2021-11-13 18:22:16,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 3369. [2021-11-13 18:22:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 2299 states have (on average 1.3405828621139626) internal successors, (3082), 2377 states have internal predecessors, (3082), 876 states have call successors, (876), 194 states have call predecessors, (876), 193 states have return successors, (875), 863 states have call predecessors, (875), 872 states have call successors, (875) [2021-11-13 18:22:16,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 4833 transitions. [2021-11-13 18:22:16,640 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 4833 transitions. Word has length 69 [2021-11-13 18:22:16,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:16,641 INFO L470 AbstractCegarLoop]: Abstraction has 3369 states and 4833 transitions. [2021-11-13 18:22:16,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:22:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 4833 transitions. [2021-11-13 18:22:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 18:22:16,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:16,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:16,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:22:16,645 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:16,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:16,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2888052, now seen corresponding path program 1 times [2021-11-13 18:22:16,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:16,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825734029] [2021-11-13 18:22:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:16,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:16,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:22:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:16,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:22:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:16,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:22:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:16,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:16,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:22:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:16,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:22:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:22:16,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:16,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825734029] [2021-11-13 18:22:16,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825734029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:16,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:22:16,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 18:22:16,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636800474] [2021-11-13 18:22:16,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:16,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:22:16,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:16,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:22:16,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:22:16,987 INFO L87 Difference]: Start difference. First operand 3369 states and 4833 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 18:22:19,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:24,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:24,177 INFO L93 Difference]: Finished difference Result 4120 states and 6071 transitions. [2021-11-13 18:22:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:22:24,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 68 [2021-11-13 18:22:24,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:24,201 INFO L225 Difference]: With dead ends: 4120 [2021-11-13 18:22:24,201 INFO L226 Difference]: Without dead ends: 4115 [2021-11-13 18:22:24,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:22:24,206 INFO L933 BasicCegarLoop]: 2068 mSDtfsCounter, 1934 mSDsluCounter, 9345 mSDsCounter, 0 mSdLazyCounter, 2840 mSolverCounterSat, 1023 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5939.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 11413 SdHoareTripleChecker+Invalid, 3864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.03ms SdHoareTripleChecker+Time, 1023 IncrementalHoareTripleChecker+Valid, 2840 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6702.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:24,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2123 Valid, 11413 Invalid, 3864 Unknown, 0 Unchecked, 43.03ms Time], IncrementalHoareTripleChecker [1023 Valid, 2840 Invalid, 1 Unknown, 0 Unchecked, 6702.19ms Time] [2021-11-13 18:22:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2021-11-13 18:22:24,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 3366. [2021-11-13 18:22:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 2297 states have (on average 1.3404440574662604) internal successors, (3079), 2374 states have internal predecessors, (3079), 875 states have call successors, (875), 194 states have call predecessors, (875), 193 states have return successors, (875), 863 states have call predecessors, (875), 872 states have call successors, (875) [2021-11-13 18:22:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4829 transitions. [2021-11-13 18:22:24,637 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4829 transitions. Word has length 68 [2021-11-13 18:22:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:24,638 INFO L470 AbstractCegarLoop]: Abstraction has 3366 states and 4829 transitions. [2021-11-13 18:22:24,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 18:22:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4829 transitions. [2021-11-13 18:22:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 18:22:24,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:24,647 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:24,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:22:24,648 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1229122377, now seen corresponding path program 1 times [2021-11-13 18:22:24,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:24,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212934725] [2021-11-13 18:22:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:24,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:24,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:22:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:25,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:22:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:25,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:22:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:25,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:25,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:22:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:25,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 18:22:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:25,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:22:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:25,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:22:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:25,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:22:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:22:25,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:25,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212934725] [2021-11-13 18:22:25,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212934725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:25,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:22:25,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-13 18:22:25,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810328801] [2021-11-13 18:22:25,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:25,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:22:25,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:25,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:22:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:22:25,195 INFO L87 Difference]: Start difference. First operand 3366 states and 4829 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:22:27,270 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:29,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:45,641 INFO L93 Difference]: Finished difference Result 3638 states and 5261 transitions. [2021-11-13 18:22:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:22:45,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 71 [2021-11-13 18:22:45,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:45,647 INFO L225 Difference]: With dead ends: 3638 [2021-11-13 18:22:45,647 INFO L226 Difference]: Without dead ends: 1480 [2021-11-13 18:22:45,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:22:45,656 INFO L933 BasicCegarLoop]: 1728 mSDtfsCounter, 1472 mSDsluCounter, 4669 mSDsCounter, 0 mSdLazyCounter, 8630 mSolverCounterSat, 837 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18233.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 6397 SdHoareTripleChecker+Invalid, 9469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 68.12ms SdHoareTripleChecker+Time, 837 IncrementalHoareTripleChecker+Valid, 8630 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19957.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:45,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1598 Valid, 6397 Invalid, 9469 Unknown, 0 Unchecked, 68.12ms Time], IncrementalHoareTripleChecker [837 Valid, 8630 Invalid, 2 Unknown, 0 Unchecked, 19957.36ms Time] [2021-11-13 18:22:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-11-13 18:22:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1161. [2021-11-13 18:22:45,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 794 states have (on average 1.3299748110831233) internal successors, (1056), 821 states have internal predecessors, (1056), 298 states have call successors, (298), 70 states have call predecessors, (298), 68 states have return successors, (294), 291 states have call predecessors, (294), 294 states have call successors, (294) [2021-11-13 18:22:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1648 transitions. [2021-11-13 18:22:45,800 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1648 transitions. Word has length 71 [2021-11-13 18:22:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:45,800 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1648 transitions. [2021-11-13 18:22:45,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:22:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1648 transitions. [2021-11-13 18:22:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-13 18:22:45,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:45,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:45,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:22:45,803 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:45,804 INFO L85 PathProgramCache]: Analyzing trace with hash -78799712, now seen corresponding path program 1 times [2021-11-13 18:22:45,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:45,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130057715] [2021-11-13 18:22:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:45,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:46,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:22:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:46,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:22:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:46,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:22:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:46,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:46,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:22:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:46,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:22:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:46,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 18:22:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:46,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:22:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:46,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:22:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:22:46,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:46,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130057715] [2021-11-13 18:22:46,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130057715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:46,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:22:46,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:22:46,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151047345] [2021-11-13 18:22:46,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:46,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:22:46,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:46,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:22:46,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:22:46,125 INFO L87 Difference]: Start difference. First operand 1161 states and 1648 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:22:48,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:50,335 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:52,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:56,796 INFO L93 Difference]: Finished difference Result 1415 states and 2064 transitions. [2021-11-13 18:22:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:22:56,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 79 [2021-11-13 18:22:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:56,802 INFO L225 Difference]: With dead ends: 1415 [2021-11-13 18:22:56,802 INFO L226 Difference]: Without dead ends: 1380 [2021-11-13 18:22:56,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:22:56,804 INFO L933 BasicCegarLoop]: 1537 mSDtfsCounter, 2984 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 1393 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9410.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3098 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 2496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.71ms SdHoareTripleChecker+Time, 1393 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10423.20ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:56,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3098 Valid, 2051 Invalid, 2496 Unknown, 0 Unchecked, 20.71ms Time], IncrementalHoareTripleChecker [1393 Valid, 1100 Invalid, 3 Unknown, 0 Unchecked, 10423.20ms Time] [2021-11-13 18:22:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-11-13 18:22:56,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1128. [2021-11-13 18:22:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 772 states have (on average 1.3354922279792747) internal successors, (1031), 797 states have internal predecessors, (1031), 291 states have call successors, (291), 65 states have call predecessors, (291), 64 states have return successors, (290), 287 states have call predecessors, (290), 290 states have call successors, (290) [2021-11-13 18:22:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1612 transitions. [2021-11-13 18:22:56,898 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1612 transitions. Word has length 79 [2021-11-13 18:22:56,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:56,898 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1612 transitions. [2021-11-13 18:22:56,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:22:56,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1612 transitions. [2021-11-13 18:22:56,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-13 18:22:56,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:56,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:56,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:22:56,901 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1039755587, now seen corresponding path program 1 times [2021-11-13 18:22:56,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:56,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392832255] [2021-11-13 18:22:56,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:56,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:57,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:22:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:57,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:22:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:57,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:22:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:57,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:57,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:22:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:57,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:22:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:57,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 18:22:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:57,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:22:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 18:22:57,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:57,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392832255] [2021-11-13 18:22:57,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392832255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:57,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:22:57,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:22:57,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612032018] [2021-11-13 18:22:57,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:57,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:22:57,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:57,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:22:57,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:22:57,159 INFO L87 Difference]: Start difference. First operand 1128 states and 1612 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:22:59,222 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:23:01,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:23:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:03,571 INFO L93 Difference]: Finished difference Result 1380 states and 2027 transitions. [2021-11-13 18:23:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:23:03,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2021-11-13 18:23:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:03,572 INFO L225 Difference]: With dead ends: 1380 [2021-11-13 18:23:03,573 INFO L226 Difference]: Without dead ends: 0 [2021-11-13 18:23:03,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:03,577 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 2123 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 617 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5559.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2325 SdHoareTripleChecker+Valid, 2281 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.37ms SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6231.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:03,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2325 Valid, 2281 Invalid, 1018 Unknown, 0 Unchecked, 13.37ms Time], IncrementalHoareTripleChecker [617 Valid, 399 Invalid, 2 Unknown, 0 Unchecked, 6231.26ms Time] [2021-11-13 18:23:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-13 18:23:03,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-13 18:23:03,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-13 18:23:03,580 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2021-11-13 18:23:03,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:03,580 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-13 18:23:03,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:23:03,581 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-13 18:23:03,581 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-13 18:23:03,584 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:23:03,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:23:03,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-13 18:23:39,629 WARN L227 SmtUtils]: Spent 35.72s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:24:13,804 WARN L227 SmtUtils]: Spent 34.17s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:24:46,234 WARN L227 SmtUtils]: Spent 32.33s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:25:20,412 WARN L227 SmtUtils]: Spent 34.16s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:25:53,602 WARN L227 SmtUtils]: Spent 33.17s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:26:25,876 WARN L227 SmtUtils]: Spent 32.27s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:27:00,521 WARN L227 SmtUtils]: Spent 34.61s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:27:36,436 WARN L227 SmtUtils]: Spent 35.91s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:28:12,206 WARN L227 SmtUtils]: Spent 35.73s 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) [2021-11-13 18:28:47,567 WARN L227 SmtUtils]: Spent 35.36s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:29:22,789 WARN L227 SmtUtils]: Spent 35.22s 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) [2021-11-13 18:29:52,619 WARN L227 SmtUtils]: Spent 29.78s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:30:22,210 WARN L227 SmtUtils]: Spent 29.58s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:30:53,757 WARN L227 SmtUtils]: Spent 31.54s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:31:26,691 WARN L227 SmtUtils]: Spent 32.93s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 18:32:03,111 WARN L227 SmtUtils]: Spent 36.42s 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)