./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ieee802154--mrf24j40.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ieee802154--mrf24j40.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 516f7415706b6c5853539632c826b0e29b08def0097a2be3ef08c779c9d5bd22 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:26:11,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:26:11,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:26:11,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:26:11,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:26:11,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:26:11,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:26:11,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:26:11,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:26:11,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:26:11,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:26:11,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:26:11,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:26:11,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:26:11,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:26:11,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:26:11,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:26:11,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:26:11,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:26:11,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:26:11,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:26:11,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:26:11,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:26:11,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:26:11,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:26:11,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:26:11,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:26:11,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:26:11,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:26:11,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:26:11,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:26:11,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:26:11,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:26:11,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:26:11,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:26:11,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:26:11,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:26:11,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:26:11,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:26:11,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:26:11,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:26:11,532 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 23:26:11,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:26:11,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:26:11,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:26:11,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:26:11,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:26:11,556 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:26:11,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:26:11,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:26:11,557 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:26:11,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:26:11,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:26:11,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:26:11,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:26:11,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:26:11,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:26:11,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:26:11,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:26:11,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:26:11,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:26:11,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:26:11,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:26:11,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:26:11,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:26:11,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:26:11,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:26:11,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:26:11,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:26:11,565 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:26:11,566 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:26:11,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:26:11,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:26:11,566 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_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 516f7415706b6c5853539632c826b0e29b08def0097a2be3ef08c779c9d5bd22 [2021-12-06 23:26:11,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:26:11,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:26:11,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:26:11,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:26:11,765 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:26:11,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ieee802154--mrf24j40.ko-entry_point.cil.out.i [2021-12-06 23:26:11,809 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/data/7a295498f/d0d645692fd14023978e0d582043bdbc/FLAG9fe4f81eb [2021-12-06 23:26:12,401 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:26:12,401 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ieee802154--mrf24j40.ko-entry_point.cil.out.i [2021-12-06 23:26:12,429 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/data/7a295498f/d0d645692fd14023978e0d582043bdbc/FLAG9fe4f81eb [2021-12-06 23:26:12,585 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/data/7a295498f/d0d645692fd14023978e0d582043bdbc [2021-12-06 23:26:12,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:26:12,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:26:12,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:26:12,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:26:12,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:26:12,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:26:12" (1/1) ... [2021-12-06 23:26:12,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b55497e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:12, skipping insertion in model container [2021-12-06 23:26:12,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:26:12" (1/1) ... [2021-12-06 23:26:12,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:26:12,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:26:13,225 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ieee802154--mrf24j40.ko-entry_point.cil.out.i[160816,160829] [2021-12-06 23:26:13,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:26:13,559 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:26:13,650 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ieee802154--mrf24j40.ko-entry_point.cil.out.i[160816,160829] [2021-12-06 23:26:13,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:26:13,756 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:26:13,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:13 WrapperNode [2021-12-06 23:26:13,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:26:13,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:26:13,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:26:13,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:26:13,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:13" (1/1) ... [2021-12-06 23:26:13,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:13" (1/1) ... [2021-12-06 23:26:13,857 INFO L137 Inliner]: procedures = 140, calls = 1066, calls flagged for inlining = 55, calls inlined = 52, statements flattened = 1906 [2021-12-06 23:26:13,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:26:13,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:26:13,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:26:13,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:26:13,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:13" (1/1) ... [2021-12-06 23:26:13,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:13" (1/1) ... [2021-12-06 23:26:13,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:13" (1/1) ... [2021-12-06 23:26:13,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:13" (1/1) ... [2021-12-06 23:26:13,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:13" (1/1) ... [2021-12-06 23:26:13,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:13" (1/1) ... [2021-12-06 23:26:13,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:13" (1/1) ... [2021-12-06 23:26:13,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:26:13,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:26:13,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:26:13,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:26:13,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:13" (1/1) ... [2021-12-06 23:26:13,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:26:14,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:14,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:26:14,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:26:14,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-06 23:26:14,041 INFO L130 BoogieDeclarations]: Found specification of procedure devm_request_threaded_irq [2021-12-06 23:26:14,041 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_request_threaded_irq [2021-12-06 23:26:14,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-06 23:26:14,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-06 23:26:14,041 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-06 23:26:14,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-06 23:26:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:26:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure write_long_reg [2021-12-06 23:26:14,042 INFO L138 BoogieDeclarations]: Found implementation of procedure write_long_reg [2021-12-06 23:26:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_1 [2021-12-06 23:26:14,042 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_1 [2021-12-06 23:26:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-06 23:26:14,042 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-06 23:26:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-12-06 23:26:14,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-12-06 23:26:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure spi_sync [2021-12-06 23:26:14,042 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_sync [2021-12-06 23:26:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-06 23:26:14,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-06 23:26:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-06 23:26:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-06 23:26:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:26:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-06 23:26:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-06 23:26:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-06 23:26:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-06 23:26:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-06 23:26:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-06 23:26:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure mrf24j40_set_channel [2021-12-06 23:26:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure mrf24j40_set_channel [2021-12-06 23:26:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_1 [2021-12-06 23:26:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_1 [2021-12-06 23:26:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 23:26:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 23:26:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure write_short_reg [2021-12-06 23:26:14,044 INFO L138 BoogieDeclarations]: Found implementation of procedure write_short_reg [2021-12-06 23:26:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 23:26:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:26:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure ieee802154_unregister_device [2021-12-06 23:26:14,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee802154_unregister_device [2021-12-06 23:26:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-06 23:26:14,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-06 23:26:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:26:14,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 23:26:14,054 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-12-06 23:26:14,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-12-06 23:26:14,054 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_init [2021-12-06 23:26:14,054 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_init [2021-12-06 23:26:14,054 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_2 [2021-12-06 23:26:14,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_2 [2021-12-06 23:26:14,055 INFO L130 BoogieDeclarations]: Found specification of procedure read_short_reg [2021-12-06 23:26:14,055 INFO L138 BoogieDeclarations]: Found implementation of procedure read_short_reg [2021-12-06 23:26:14,055 INFO L130 BoogieDeclarations]: Found specification of procedure mrf24j40_filter [2021-12-06 23:26:14,055 INFO L138 BoogieDeclarations]: Found implementation of procedure mrf24j40_filter [2021-12-06 23:26:14,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 23:26:14,055 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-06 23:26:14,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-06 23:26:14,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:26:14,056 INFO L130 BoogieDeclarations]: Found specification of procedure devm_kzalloc [2021-12-06 23:26:14,056 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_kzalloc [2021-12-06 23:26:14,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 23:26:14,056 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-06 23:26:14,056 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-06 23:26:14,056 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_add_tail [2021-12-06 23:26:14,056 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_add_tail [2021-12-06 23:26:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure mrf24j40_tx [2021-12-06 23:26:14,057 INFO L138 BoogieDeclarations]: Found implementation of procedure mrf24j40_tx [2021-12-06 23:26:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure mrf24j40_isr [2021-12-06 23:26:14,057 INFO L138 BoogieDeclarations]: Found implementation of procedure mrf24j40_isr [2021-12-06 23:26:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure mrf24j40_ed [2021-12-06 23:26:14,057 INFO L138 BoogieDeclarations]: Found implementation of procedure mrf24j40_ed [2021-12-06 23:26:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-12-06 23:26:14,057 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-12-06 23:26:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure ieee802154_free_device [2021-12-06 23:26:14,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee802154_free_device [2021-12-06 23:26:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:26:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-06 23:26:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-06 23:26:14,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-06 23:26:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:26:14,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:26:14,338 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:26:14,339 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:26:23,169 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-06 23:26:31,853 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:26:31,866 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:26:31,866 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-06 23:26:31,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:26:31 BoogieIcfgContainer [2021-12-06 23:26:31,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:26:31,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:26:31,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:26:31,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:26:31,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:26:12" (1/3) ... [2021-12-06 23:26:31,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190a7120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:26:31, skipping insertion in model container [2021-12-06 23:26:31,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:13" (2/3) ... [2021-12-06 23:26:31,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190a7120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:26:31, skipping insertion in model container [2021-12-06 23:26:31,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:26:31" (3/3) ... [2021-12-06 23:26:31,877 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ieee802154--mrf24j40.ko-entry_point.cil.out.i [2021-12-06 23:26:31,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:26:31,882 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:26:31,924 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:26:31,930 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:26:31,930 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:26:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand has 621 states, 439 states have (on average 1.3690205011389522) internal successors, (601), 453 states have internal predecessors, (601), 148 states have call successors, (148), 33 states have call predecessors, (148), 32 states have return successors, (140), 140 states have call predecessors, (140), 140 states have call successors, (140) [2021-12-06 23:26:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 23:26:31,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:31,974 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:31,975 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:31,979 INFO L85 PathProgramCache]: Analyzing trace with hash -829070918, now seen corresponding path program 1 times [2021-12-06 23:26:31,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:31,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140770198] [2021-12-06 23:26:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:31,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:32,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:26:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:32,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:26:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:32,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:26:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:26:32,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:32,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140770198] [2021-12-06 23:26:32,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140770198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:32,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:32,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:26:32,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888374966] [2021-12-06 23:26:32,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:32,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:26:32,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:32,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:26:32,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:26:32,508 INFO L87 Difference]: Start difference. First operand has 621 states, 439 states have (on average 1.3690205011389522) internal successors, (601), 453 states have internal predecessors, (601), 148 states have call successors, (148), 33 states have call predecessors, (148), 32 states have return successors, (140), 140 states have call predecessors, (140), 140 states have call successors, (140) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 23:26:34,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:26:36,201 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:26:38,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:26:40,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:26:42,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:26:45,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:26:47,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:26:50,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:26:52,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:26:52,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:52,780 INFO L93 Difference]: Finished difference Result 1873 states and 2867 transitions. [2021-12-06 23:26:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:26:52,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2021-12-06 23:26:52,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:52,802 INFO L225 Difference]: With dead ends: 1873 [2021-12-06 23:26:52,802 INFO L226 Difference]: Without dead ends: 1233 [2021-12-06 23:26:52,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:26:52,812 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 963 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 302 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 2270 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:52,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 2270 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 418 Invalid, 8 Unknown, 0 Unchecked, 20.1s Time] [2021-12-06 23:26:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-12-06 23:26:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1146. [2021-12-06 23:26:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 827 states have (on average 1.336154776299879) internal successors, (1105), 835 states have internal predecessors, (1105), 259 states have call successors, (259), 60 states have call predecessors, (259), 59 states have return successors, (258), 258 states have call predecessors, (258), 258 states have call successors, (258) [2021-12-06 23:26:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1622 transitions. [2021-12-06 23:26:52,926 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1622 transitions. Word has length 37 [2021-12-06 23:26:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:52,927 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 1622 transitions. [2021-12-06 23:26:52,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 23:26:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1622 transitions. [2021-12-06 23:26:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 23:26:52,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:52,931 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:52,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:26:52,931 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:52,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1782236089, now seen corresponding path program 1 times [2021-12-06 23:26:52,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:52,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622730161] [2021-12-06 23:26:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:52,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:53,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:26:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:53,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:26:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:53,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:26:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:26:53,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:53,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622730161] [2021-12-06 23:26:53,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622730161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:53,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:53,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:26:53,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961998133] [2021-12-06 23:26:53,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:53,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:26:53,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:26:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:26:53,139 INFO L87 Difference]: Start difference. First operand 1146 states and 1622 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 23:26:55,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:26:57,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:26:59,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:01,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:05,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:07,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:08,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:08,775 INFO L93 Difference]: Finished difference Result 3541 states and 5099 transitions. [2021-12-06 23:27:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:27:08,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-12-06 23:27:08,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:08,795 INFO L225 Difference]: With dead ends: 3541 [2021-12-06 23:27:08,795 INFO L226 Difference]: Without dead ends: 2398 [2021-12-06 23:27:08,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:27:08,802 INFO L933 BasicCegarLoop]: 1022 mSDtfsCounter, 947 mSDsluCounter, 3115 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 288 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 4137 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:08,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 4137 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 694 Invalid, 6 Unknown, 0 Unchecked, 15.4s Time] [2021-12-06 23:27:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-12-06 23:27:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 2259. [2021-12-06 23:27:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 1636 states have (on average 1.3380195599022005) internal successors, (2189), 1658 states have internal predecessors, (2189), 499 states have call successors, (499), 116 states have call predecessors, (499), 123 states have return successors, (546), 500 states have call predecessors, (546), 498 states have call successors, (546) [2021-12-06 23:27:08,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 3234 transitions. [2021-12-06 23:27:08,912 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 3234 transitions. Word has length 39 [2021-12-06 23:27:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:08,913 INFO L470 AbstractCegarLoop]: Abstraction has 2259 states and 3234 transitions. [2021-12-06 23:27:08,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 23:27:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 3234 transitions. [2021-12-06 23:27:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-06 23:27:08,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:08,925 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:08,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:27:08,925 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:08,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2071322685, now seen corresponding path program 1 times [2021-12-06 23:27:08,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:08,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598520160] [2021-12-06 23:27:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:08,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:09,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:27:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:09,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:09,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:09,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 23:27:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:09,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:27:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:09,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:09,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:27:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:27:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:27:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:27:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 23:27:10,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:10,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598520160] [2021-12-06 23:27:10,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598520160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:10,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551685156] [2021-12-06 23:27:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:10,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:10,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:10,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:10,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:27:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 3772 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:27:11,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 23:27:12,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:27:12,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551685156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:27:12,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:27:12,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-12-06 23:27:12,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358812404] [2021-12-06 23:27:12,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:27:12,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:27:12,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:27:12,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:27:12,271 INFO L87 Difference]: Start difference. First operand 2259 states and 3234 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:27:14,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:16,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:17,783 INFO L93 Difference]: Finished difference Result 4528 states and 6497 transitions. [2021-12-06 23:27:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:27:17,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 232 [2021-12-06 23:27:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:17,799 INFO L225 Difference]: With dead ends: 4528 [2021-12-06 23:27:17,799 INFO L226 Difference]: Without dead ends: 2279 [2021-12-06 23:27:17,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:27:17,809 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 758 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1971 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:17,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 1971 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 591 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2021-12-06 23:27:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-12-06 23:27:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2263. [2021-12-06 23:27:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 1638 states have (on average 1.3376068376068375) internal successors, (2191), 1662 states have internal predecessors, (2191), 499 states have call successors, (499), 116 states have call predecessors, (499), 125 states have return successors, (548), 500 states have call predecessors, (548), 498 states have call successors, (548) [2021-12-06 23:27:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 3238 transitions. [2021-12-06 23:27:17,897 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 3238 transitions. Word has length 232 [2021-12-06 23:27:17,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:17,898 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 3238 transitions. [2021-12-06 23:27:17,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:27:17,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 3238 transitions. [2021-12-06 23:27:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-06 23:27:17,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:17,905 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:17,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:27:18,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:18,107 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:18,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2131116005, now seen corresponding path program 1 times [2021-12-06 23:27:18,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:18,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902208247] [2021-12-06 23:27:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:18,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:18,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:27:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:18,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:18,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:18,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 23:27:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:18,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:27:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:18,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:18,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:27:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:27:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:27:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:27:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 23:27:19,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:19,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902208247] [2021-12-06 23:27:19,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902208247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:19,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714309837] [2021-12-06 23:27:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:19,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:19,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:19,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:19,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:27:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:20,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 3774 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:27:20,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 23:27:21,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:27:21,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714309837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:27:21,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:27:21,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-12-06 23:27:21,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083570365] [2021-12-06 23:27:21,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:27:21,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:27:21,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:21,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:27:21,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:27:21,316 INFO L87 Difference]: Start difference. First operand 2263 states and 3238 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:27:23,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:25,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:26,830 INFO L93 Difference]: Finished difference Result 4532 states and 6495 transitions. [2021-12-06 23:27:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:27:26,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 233 [2021-12-06 23:27:26,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:26,846 INFO L225 Difference]: With dead ends: 4532 [2021-12-06 23:27:26,847 INFO L226 Difference]: Without dead ends: 2279 [2021-12-06 23:27:26,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:27:26,856 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 757 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1971 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:26,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 1971 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 588 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2021-12-06 23:27:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-12-06 23:27:26,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2263. [2021-12-06 23:27:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 1638 states have (on average 1.3376068376068375) internal successors, (2191), 1662 states have internal predecessors, (2191), 499 states have call successors, (499), 116 states have call predecessors, (499), 125 states have return successors, (542), 500 states have call predecessors, (542), 498 states have call successors, (542) [2021-12-06 23:27:26,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 3232 transitions. [2021-12-06 23:27:26,936 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 3232 transitions. Word has length 233 [2021-12-06 23:27:26,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:26,937 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 3232 transitions. [2021-12-06 23:27:26,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:27:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 3232 transitions. [2021-12-06 23:27:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-06 23:27:26,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:26,945 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:26,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:27:27,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-06 23:27:27,146 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash 683377002, now seen corresponding path program 1 times [2021-12-06 23:27:27,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:27,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178791409] [2021-12-06 23:27:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:27,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:27,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:27:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:27,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:27,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:27,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:27:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:27,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:27:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:27,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:27,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:27:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:27:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:27:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:27:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 23:27:28,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:28,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178791409] [2021-12-06 23:27:28,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178791409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:28,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293625842] [2021-12-06 23:27:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:28,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:28,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:28,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:28,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:27:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:29,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 3768 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:27:29,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 23:27:30,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:27:30,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293625842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:27:30,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:27:30,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-12-06 23:27:30,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084016182] [2021-12-06 23:27:30,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:27:30,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:27:30,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:30,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:27:30,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:27:30,254 INFO L87 Difference]: Start difference. First operand 2263 states and 3232 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:27:32,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:34,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:35,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:35,904 INFO L93 Difference]: Finished difference Result 6789 states and 9716 transitions. [2021-12-06 23:27:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:27:35,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 230 [2021-12-06 23:27:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:35,926 INFO L225 Difference]: With dead ends: 6789 [2021-12-06 23:27:35,926 INFO L226 Difference]: Without dead ends: 4536 [2021-12-06 23:27:35,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:27:35,933 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 759 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 2943 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:35,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 2943 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 597 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-12-06 23:27:35,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-12-06 23:27:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 4510. [2021-12-06 23:27:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 3263 states have (on average 1.3386454183266931) internal successors, (4368), 3313 states have internal predecessors, (4368), 994 states have call successors, (994), 231 states have call predecessors, (994), 252 states have return successors, (1087), 997 states have call predecessors, (1087), 993 states have call successors, (1087) [2021-12-06 23:27:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 6449 transitions. [2021-12-06 23:27:36,080 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 6449 transitions. Word has length 230 [2021-12-06 23:27:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:36,081 INFO L470 AbstractCegarLoop]: Abstraction has 4510 states and 6449 transitions. [2021-12-06 23:27:36,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:27:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 6449 transitions. [2021-12-06 23:27:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-06 23:27:36,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:36,089 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:36,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:27:36,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:36,306 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:36,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1193096587, now seen corresponding path program 1 times [2021-12-06 23:27:36,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:36,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643908765] [2021-12-06 23:27:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:36,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:36,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:27:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:36,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:36,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:36,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:27:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:36,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:27:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:27:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:27:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:27:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:27:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 23:27:37,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:37,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643908765] [2021-12-06 23:27:37,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643908765] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:37,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359171117] [2021-12-06 23:27:37,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:37,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:37,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:37,462 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:37,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:27:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:38,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 3766 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:27:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 23:27:39,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:27:39,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359171117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:27:39,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:27:39,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-12-06 23:27:39,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234344372] [2021-12-06 23:27:39,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:27:39,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:27:39,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:27:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:27:39,469 INFO L87 Difference]: Start difference. First operand 4510 states and 6449 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:27:41,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:43,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:45,201 INFO L93 Difference]: Finished difference Result 13546 states and 19403 transitions. [2021-12-06 23:27:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:27:45,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 229 [2021-12-06 23:27:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:45,247 INFO L225 Difference]: With dead ends: 13546 [2021-12-06 23:27:45,247 INFO L226 Difference]: Without dead ends: 9046 [2021-12-06 23:27:45,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:27:45,263 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 760 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 2943 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:45,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 2943 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 597 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-12-06 23:27:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9046 states. [2021-12-06 23:27:45,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9046 to 9004. [2021-12-06 23:27:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9004 states, 6513 states have (on average 1.3391678182097344) internal successors, (8722), 6615 states have internal predecessors, (8722), 1984 states have call successors, (1984), 461 states have call predecessors, (1984), 506 states have return successors, (2175), 1991 states have call predecessors, (2175), 1983 states have call successors, (2175) [2021-12-06 23:27:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9004 states to 9004 states and 12881 transitions. [2021-12-06 23:27:45,580 INFO L78 Accepts]: Start accepts. Automaton has 9004 states and 12881 transitions. Word has length 229 [2021-12-06 23:27:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:45,580 INFO L470 AbstractCegarLoop]: Abstraction has 9004 states and 12881 transitions. [2021-12-06 23:27:45,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:27:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 9004 states and 12881 transitions. [2021-12-06 23:27:45,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-06 23:27:45,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:45,588 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:45,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:27:45,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 23:27:45,789 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:45,789 INFO L85 PathProgramCache]: Analyzing trace with hash -149570922, now seen corresponding path program 1 times [2021-12-06 23:27:45,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:45,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298940054] [2021-12-06 23:27:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:45,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:27:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:27:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:27:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:27:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:27:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:27:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:27:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 23:27:46,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:46,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298940054] [2021-12-06 23:27:46,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298940054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:46,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598949481] [2021-12-06 23:27:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:46,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:46,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:46,849 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:46,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:27:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 3768 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:27:47,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 23:27:48,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:27:48,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598949481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:27:48,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:27:48,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-12-06 23:27:48,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257664074] [2021-12-06 23:27:48,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:27:48,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:27:48,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:48,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:27:48,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:27:48,927 INFO L87 Difference]: Start difference. First operand 9004 states and 12881 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:27:50,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:52,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:27:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:54,605 INFO L93 Difference]: Finished difference Result 27056 states and 38745 transitions. [2021-12-06 23:27:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:27:54,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 230 [2021-12-06 23:27:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:54,685 INFO L225 Difference]: With dead ends: 27056 [2021-12-06 23:27:54,686 INFO L226 Difference]: Without dead ends: 18062 [2021-12-06 23:27:54,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:27:54,715 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 756 mSDsluCounter, 2101 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 3090 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:54,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 3090 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 593 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2021-12-06 23:27:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18062 states. [2021-12-06 23:27:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18062 to 17924. [2021-12-06 23:27:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17924 states, 12947 states have (on average 1.3411601143121958) internal successors, (17364), 13215 states have internal predecessors, (17364), 3964 states have call successors, (3964), 921 states have call predecessors, (3964), 1012 states have return successors, (4323), 3915 states have call predecessors, (4323), 3963 states have call successors, (4323) [2021-12-06 23:27:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17924 states to 17924 states and 25651 transitions. [2021-12-06 23:27:55,263 INFO L78 Accepts]: Start accepts. Automaton has 17924 states and 25651 transitions. Word has length 230 [2021-12-06 23:27:55,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:55,264 INFO L470 AbstractCegarLoop]: Abstraction has 17924 states and 25651 transitions. [2021-12-06 23:27:55,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:27:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 17924 states and 25651 transitions. [2021-12-06 23:27:55,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-06 23:27:55,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:55,276 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:55,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:27:55,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:55,478 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:55,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:55,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1874664626, now seen corresponding path program 1 times [2021-12-06 23:27:55,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:55,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059768622] [2021-12-06 23:27:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:55,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:55,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:27:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:55,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:55,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:55,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 23:27:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:55,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:27:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:27:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:27:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:27:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:27:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:27:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:27:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:27:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:27:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:27:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 23:27:56,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:56,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059768622] [2021-12-06 23:27:56,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059768622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:56,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116841958] [2021-12-06 23:27:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:56,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:56,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:56,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:56,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:27:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:57,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 3770 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:27:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 23:27:58,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:27:58,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116841958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:27:58,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:27:58,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-12-06 23:27:58,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271323409] [2021-12-06 23:27:58,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:27:58,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:27:58,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:58,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:27:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:27:58,647 INFO L87 Difference]: Start difference. First operand 17924 states and 25651 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:28:00,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:02,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:28:04,527 INFO L93 Difference]: Finished difference Result 27046 states and 38775 transitions. [2021-12-06 23:28:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:28:04,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 231 [2021-12-06 23:28:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:28:04,580 INFO L225 Difference]: With dead ends: 27046 [2021-12-06 23:28:04,580 INFO L226 Difference]: Without dead ends: 17988 [2021-12-06 23:28:04,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:28:04,600 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 744 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 1971 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:28:04,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 1971 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 585 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-12-06 23:28:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17988 states. [2021-12-06 23:28:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17988 to 17860. [2021-12-06 23:28:05,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17860 states, 12915 states have (on average 1.340766550522648) internal successors, (17316), 13167 states have internal predecessors, (17316), 3948 states have call successors, (3948), 921 states have call predecessors, (3948), 996 states have return successors, (4251), 3899 states have call predecessors, (4251), 3947 states have call successors, (4251) [2021-12-06 23:28:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17860 states to 17860 states and 25515 transitions. [2021-12-06 23:28:05,157 INFO L78 Accepts]: Start accepts. Automaton has 17860 states and 25515 transitions. Word has length 231 [2021-12-06 23:28:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:28:05,157 INFO L470 AbstractCegarLoop]: Abstraction has 17860 states and 25515 transitions. [2021-12-06 23:28:05,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:28:05,158 INFO L276 IsEmpty]: Start isEmpty. Operand 17860 states and 25515 transitions. [2021-12-06 23:28:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-06 23:28:05,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:28:05,167 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:28:05,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:28:05,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 23:28:05,368 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:28:05,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:28:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1958457725, now seen corresponding path program 1 times [2021-12-06 23:28:05,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:28:05,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514272453] [2021-12-06 23:28:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:05,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:28:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:05,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:28:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:05,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:05,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:05,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 23:28:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:05,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:28:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:05,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:28:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:28:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:28:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:28:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:28:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:28:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:28:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:28:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:28:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:28:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:28:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:28:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 23:28:06,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:28:06,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514272453] [2021-12-06 23:28:06,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514272453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:28:06,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220279830] [2021-12-06 23:28:06,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:06,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:06,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:28:06,338 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:28:06,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:28:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:07,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 3764 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:28:07,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:28:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 23:28:08,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:28:08,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220279830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:28:08,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:28:08,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-12-06 23:28:08,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134040552] [2021-12-06 23:28:08,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:28:08,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:28:08,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:28:08,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:28:08,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:28:08,520 INFO L87 Difference]: Start difference. First operand 17860 states and 25515 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:28:10,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:12,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:14,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:28:14,826 INFO L93 Difference]: Finished difference Result 53696 states and 76827 transitions. [2021-12-06 23:28:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:28:14,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 228 [2021-12-06 23:28:14,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:28:14,962 INFO L225 Difference]: With dead ends: 53696 [2021-12-06 23:28:14,962 INFO L226 Difference]: Without dead ends: 35846 [2021-12-06 23:28:15,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:28:15,010 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 746 mSDsluCounter, 2245 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 3225 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:28:15,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 3225 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-12-06 23:28:15,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35846 states. [2021-12-06 23:28:15,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35846 to 35708. [2021-12-06 23:28:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35708 states, 25819 states have (on average 1.3408730005035052) internal successors, (34620), 26327 states have internal predecessors, (34620), 7892 states have call successors, (7892), 1841 states have call predecessors, (7892), 1996 states have return successors, (8499), 7795 states have call predecessors, (8499), 7891 states have call successors, (8499) [2021-12-06 23:28:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35708 states to 35708 states and 51011 transitions. [2021-12-06 23:28:16,105 INFO L78 Accepts]: Start accepts. Automaton has 35708 states and 51011 transitions. Word has length 228 [2021-12-06 23:28:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:28:16,106 INFO L470 AbstractCegarLoop]: Abstraction has 35708 states and 51011 transitions. [2021-12-06 23:28:16,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:28:16,106 INFO L276 IsEmpty]: Start isEmpty. Operand 35708 states and 51011 transitions. [2021-12-06 23:28:16,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-06 23:28:16,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:28:16,116 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:28:16,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 23:28:16,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:16,317 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:28:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:28:16,317 INFO L85 PathProgramCache]: Analyzing trace with hash -177428610, now seen corresponding path program 1 times [2021-12-06 23:28:16,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:28:16,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637008557] [2021-12-06 23:28:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:16,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:28:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:16,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:28:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:16,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:16,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:16,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:28:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:16,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:28:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:16,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:28:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:28:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:28:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:28:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:28:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:28:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:28:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:28:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:28:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:28:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:28:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:28:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 23:28:17,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:28:17,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637008557] [2021-12-06 23:28:17,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637008557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:28:17,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283044806] [2021-12-06 23:28:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:17,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:17,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:28:17,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:28:17,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:28:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:18,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 3762 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:28:18,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:28:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 23:28:19,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:28:19,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283044806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:28:19,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:28:19,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-12-06 23:28:19,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825394166] [2021-12-06 23:28:19,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:28:19,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:28:19,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:28:19,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:28:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:28:19,663 INFO L87 Difference]: Start difference. First operand 35708 states and 51011 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:28:21,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:23,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:28:26,589 INFO L93 Difference]: Finished difference Result 100264 states and 143011 transitions. [2021-12-06 23:28:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:28:26,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 227 [2021-12-06 23:28:26,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:28:26,791 INFO L225 Difference]: With dead ends: 100264 [2021-12-06 23:28:26,791 INFO L226 Difference]: Without dead ends: 64160 [2021-12-06 23:28:26,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:28:26,878 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 743 mSDsluCounter, 2122 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 3129 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:28:26,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 3129 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 616 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2021-12-06 23:28:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64160 states. [2021-12-06 23:28:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64160 to 63742. [2021-12-06 23:28:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63742 states, 46004 states have (on average 1.3384270932962352) internal successors, (61573), 47064 states have internal predecessors, (61573), 14065 states have call successors, (14065), 3369 states have call predecessors, (14065), 3672 states have return successors, (15142), 13756 states have call predecessors, (15142), 14064 states have call successors, (15142) [2021-12-06 23:28:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63742 states to 63742 states and 90780 transitions. [2021-12-06 23:28:28,960 INFO L78 Accepts]: Start accepts. Automaton has 63742 states and 90780 transitions. Word has length 227 [2021-12-06 23:28:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:28:28,961 INFO L470 AbstractCegarLoop]: Abstraction has 63742 states and 90780 transitions. [2021-12-06 23:28:28,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-06 23:28:28,961 INFO L276 IsEmpty]: Start isEmpty. Operand 63742 states and 90780 transitions. [2021-12-06 23:28:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-06 23:28:28,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:28:28,977 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:28:29,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 23:28:29,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:29,178 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:28:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:28:29,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1072809895, now seen corresponding path program 1 times [2021-12-06 23:28:29,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:28:29,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251534364] [2021-12-06 23:28:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:29,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:28:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:29,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:28:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:29,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:29,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:29,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:28:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:29,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:28:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:29,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:28:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:29,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:28:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:28:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 23:28:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:28:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:28:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:28:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:28:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:28:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:28:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 23:28:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:28:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:28:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:28:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:28:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 23:28:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-06 23:28:30,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:28:30,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251534364] [2021-12-06 23:28:30,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251534364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:28:30,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132800958] [2021-12-06 23:28:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:30,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:30,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:28:30,308 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:28:30,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:28:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:31,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 3821 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 23:28:31,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:28:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-06 23:28:32,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:28:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-06 23:28:33,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132800958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:28:33,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:28:33,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 26 [2021-12-06 23:28:33,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640964739] [2021-12-06 23:28:33,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:28:33,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 23:28:33,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:28:33,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 23:28:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:28:33,806 INFO L87 Difference]: Start difference. First operand 63742 states and 90780 transitions. Second operand has 26 states, 26 states have (on average 9.26923076923077) internal successors, (241), 17 states have internal predecessors, (241), 7 states have call successors, (62), 8 states have call predecessors, (62), 8 states have return successors, (57), 10 states have call predecessors, (57), 7 states have call successors, (57) [2021-12-06 23:28:35,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:37,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:39,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:41,837 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:43,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:48,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:53,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:55,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:57,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:28:59,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:01,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:03,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:06,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:08,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:10,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:12,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:14,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:16,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:18,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:20,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:22,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:24,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:26,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:28,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:30,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:33,230 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:36,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:38,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:40,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:42,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:47,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:51,137 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:54,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:29:56,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:30:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:30:03,266 INFO L93 Difference]: Finished difference Result 182440 states and 273125 transitions. [2021-12-06 23:30:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 23:30:03,267 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.26923076923077) internal successors, (241), 17 states have internal predecessors, (241), 7 states have call successors, (62), 8 states have call predecessors, (62), 8 states have return successors, (57), 10 states have call predecessors, (57), 7 states have call successors, (57) Word has length 240 [2021-12-06 23:30:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:30:03,706 INFO L225 Difference]: With dead ends: 182440 [2021-12-06 23:30:03,706 INFO L226 Difference]: Without dead ends: 117728 [2021-12-06 23:30:03,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=654, Invalid=3506, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 23:30:03,949 INFO L933 BasicCegarLoop]: 1267 mSDtfsCounter, 2169 mSDsluCounter, 16573 mSDsCounter, 0 mSdLazyCounter, 5212 mSolverCounterSat, 693 mSolverCounterUnsat, 33 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2385 SdHoareTripleChecker+Valid, 17840 SdHoareTripleChecker+Invalid, 5938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 5212 IncrementalHoareTripleChecker+Invalid, 33 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:30:03,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2385 Valid, 17840 Invalid, 5938 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [693 Valid, 5212 Invalid, 33 Unknown, 0 Unchecked, 83.0s Time] [2021-12-06 23:30:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117728 states. [2021-12-06 23:30:07,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117728 to 110300. [2021-12-06 23:30:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110300 states, 79734 states have (on average 1.3358792986680714) internal successors, (106515), 82166 states have internal predecessors, (106515), 23829 states have call successors, (23829), 5679 states have call predecessors, (23829), 6736 states have return successors, (27234), 23176 states have call predecessors, (27234), 23828 states have call successors, (27234) [2021-12-06 23:30:07,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110300 states to 110300 states and 157578 transitions. [2021-12-06 23:30:07,757 INFO L78 Accepts]: Start accepts. Automaton has 110300 states and 157578 transitions. Word has length 240 [2021-12-06 23:30:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:30:07,757 INFO L470 AbstractCegarLoop]: Abstraction has 110300 states and 157578 transitions. [2021-12-06 23:30:07,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.26923076923077) internal successors, (241), 17 states have internal predecessors, (241), 7 states have call successors, (62), 8 states have call predecessors, (62), 8 states have return successors, (57), 10 states have call predecessors, (57), 7 states have call successors, (57) [2021-12-06 23:30:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 110300 states and 157578 transitions. [2021-12-06 23:30:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-06 23:30:07,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:30:07,786 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:30:07,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:30:07,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:30:07,987 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:30:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:30:07,988 INFO L85 PathProgramCache]: Analyzing trace with hash -920937652, now seen corresponding path program 1 times [2021-12-06 23:30:07,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:30:07,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660888851] [2021-12-06 23:30:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:30:07,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:30:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:08,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:30:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:08,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:30:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:08,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:30:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:08,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 23:30:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:08,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:30:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:08,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:30:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:08,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:30:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:30:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:30:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:30:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 23:30:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:30:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 23:30:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:30:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:30:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:30:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 23:30:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:30:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 23:30:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:30:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:30:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:30:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 23:30:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:30:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 23:30:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:30:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-06 23:30:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:30:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 23:30:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:30:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 23:30:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:30:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-06 23:30:09,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:30:09,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660888851] [2021-12-06 23:30:09,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660888851] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:30:09,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290386868] [2021-12-06 23:30:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:30:09,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:30:09,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:30:09,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:30:09,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:30:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:30:10,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 3883 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 23:30:10,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:30:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-06 23:30:12,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:30:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-06 23:30:13,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290386868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:30:13,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:30:13,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 28 [2021-12-06 23:30:13,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826219192] [2021-12-06 23:30:13,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:30:13,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 23:30:13,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:30:13,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 23:30:13,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-12-06 23:30:13,282 INFO L87 Difference]: Start difference. First operand 110300 states and 157578 transitions. Second operand has 28 states, 28 states have (on average 8.964285714285714) internal successors, (251), 19 states have internal predecessors, (251), 8 states have call successors, (63), 8 states have call predecessors, (63), 8 states have return successors, (57), 10 states have call predecessors, (57), 8 states have call successors, (57) [2021-12-06 23:30:15,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:30:17,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:30:18,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:30:20,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:30:22,832 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:30:27,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:30:35,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:30:37,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:30:47,624 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:30:51,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:30:53,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:30:58,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:31:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:31:19,476 INFO L93 Difference]: Finished difference Result 255780 states and 380817 transitions. [2021-12-06 23:31:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-06 23:31:19,477 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 8.964285714285714) internal successors, (251), 19 states have internal predecessors, (251), 8 states have call successors, (63), 8 states have call predecessors, (63), 8 states have return successors, (57), 10 states have call predecessors, (57), 8 states have call successors, (57) Word has length 245 [2021-12-06 23:31:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:31:19,999 INFO L225 Difference]: With dead ends: 255780 [2021-12-06 23:31:19,999 INFO L226 Difference]: Without dead ends: 144510 [2021-12-06 23:31:20,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4822 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1760, Invalid=12760, Unknown=0, NotChecked=0, Total=14520 [2021-12-06 23:31:20,507 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4405 mSDsluCounter, 26136 mSDsCounter, 0 mSdLazyCounter, 10080 mSolverCounterSat, 1684 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4754 SdHoareTripleChecker+Valid, 27728 SdHoareTripleChecker+Invalid, 11775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1684 IncrementalHoareTripleChecker+Valid, 10080 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:31:20,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4754 Valid, 27728 Invalid, 11775 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1684 Valid, 10080 Invalid, 11 Unknown, 0 Unchecked, 53.2s Time] [2021-12-06 23:31:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144510 states. [2021-12-06 23:31:24,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144510 to 113892. [2021-12-06 23:31:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113892 states, 82433 states have (on average 1.3343321242706199) internal successors, (109993), 85009 states have internal predecessors, (109993), 24475 states have call successors, (24475), 5854 states have call predecessors, (24475), 6983 states have return successors, (28002), 23750 states have call predecessors, (28002), 24474 states have call successors, (28002) [2021-12-06 23:31:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113892 states to 113892 states and 162470 transitions. [2021-12-06 23:31:24,753 INFO L78 Accepts]: Start accepts. Automaton has 113892 states and 162470 transitions. Word has length 245 [2021-12-06 23:31:24,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:31:24,753 INFO L470 AbstractCegarLoop]: Abstraction has 113892 states and 162470 transitions. [2021-12-06 23:31:24,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.964285714285714) internal successors, (251), 19 states have internal predecessors, (251), 8 states have call successors, (63), 8 states have call predecessors, (63), 8 states have return successors, (57), 10 states have call predecessors, (57), 8 states have call successors, (57) [2021-12-06 23:31:24,754 INFO L276 IsEmpty]: Start isEmpty. Operand 113892 states and 162470 transitions. [2021-12-06 23:31:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-06 23:31:24,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:31:24,779 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:31:24,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:31:24,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:31:24,981 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:31:24,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:31:24,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1706320960, now seen corresponding path program 1 times [2021-12-06 23:31:24,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:31:24,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475230162] [2021-12-06 23:31:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:31:24,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:31:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:25,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:31:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:25,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:31:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:25,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:31:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:25,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:31:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:25,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 23:31:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:25,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:31:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:25,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:31:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:25,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:31:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:31:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:31:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:31:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 23:31:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 23:31:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:31:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:31:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:31:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:31:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 23:31:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 23:31:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:31:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:31:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:31:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:31:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 23:31:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 23:31:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:31:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-06 23:31:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:31:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:31:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:31:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:31:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 23:31:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 23:31:26,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:31:26,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475230162] [2021-12-06 23:31:26,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475230162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:31:26,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722502726] [2021-12-06 23:31:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:31:26,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:31:26,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:31:26,336 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:31:26,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:31:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:31:27,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 3945 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 23:31:27,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:31:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-06 23:31:29,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:31:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-12-06 23:31:30,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722502726] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:31:30,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:31:30,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 29 [2021-12-06 23:31:30,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749382595] [2021-12-06 23:31:30,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:31:30,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 23:31:30,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:31:30,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 23:31:30,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-06 23:31:30,339 INFO L87 Difference]: Start difference. First operand 113892 states and 162470 transitions. Second operand has 29 states, 29 states have (on average 8.758620689655173) internal successors, (254), 20 states have internal predecessors, (254), 8 states have call successors, (63), 8 states have call predecessors, (63), 8 states have return successors, (57), 10 states have call predecessors, (57), 8 states have call successors, (57) [2021-12-06 23:31:32,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:31:34,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:31:36,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:31:38,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:31:42,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:31:47,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:31:50,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:31:59,201 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:32:02,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:32:06,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:32:10,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:32:13,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:32:23,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:32:27,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:32:32,865 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:32:35,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:32:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:32:38,730 INFO L93 Difference]: Finished difference Result 249796 states and 370313 transitions. [2021-12-06 23:32:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-12-06 23:32:38,731 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 8.758620689655173) internal successors, (254), 20 states have internal predecessors, (254), 8 states have call successors, (63), 8 states have call predecessors, (63), 8 states have return successors, (57), 10 states have call predecessors, (57), 8 states have call successors, (57) Word has length 250 [2021-12-06 23:32:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:32:39,200 INFO L225 Difference]: With dead ends: 249796 [2021-12-06 23:32:39,200 INFO L226 Difference]: Without dead ends: 134934 [2021-12-06 23:32:39,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5474 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1829, Invalid=14427, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 23:32:39,663 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 4509 mSDsluCounter, 19063 mSDsCounter, 0 mSdLazyCounter, 7085 mSolverCounterSat, 1962 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4861 SdHoareTripleChecker+Valid, 20642 SdHoareTripleChecker+Invalid, 9063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1962 IncrementalHoareTripleChecker+Valid, 7085 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:32:39,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4861 Valid, 20642 Invalid, 9063 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1962 Valid, 7085 Invalid, 16 Unknown, 0 Unchecked, 54.6s Time] [2021-12-06 23:32:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134934 states. [2021-12-06 23:32:43,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134934 to 100454. [2021-12-06 23:32:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100454 states, 72783 states have (on average 1.3318632098154788) internal successors, (96937), 75029 states have internal predecessors, (96937), 21499 states have call successors, (21499), 5176 states have call predecessors, (21499), 6171 states have return successors, (24490), 20874 states have call predecessors, (24490), 21498 states have call successors, (24490) [2021-12-06 23:32:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100454 states to 100454 states and 142926 transitions. [2021-12-06 23:32:43,615 INFO L78 Accepts]: Start accepts. Automaton has 100454 states and 142926 transitions. Word has length 250 [2021-12-06 23:32:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:32:43,615 INFO L470 AbstractCegarLoop]: Abstraction has 100454 states and 142926 transitions. [2021-12-06 23:32:43,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.758620689655173) internal successors, (254), 20 states have internal predecessors, (254), 8 states have call successors, (63), 8 states have call predecessors, (63), 8 states have return successors, (57), 10 states have call predecessors, (57), 8 states have call successors, (57) [2021-12-06 23:32:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 100454 states and 142926 transitions. [2021-12-06 23:32:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-06 23:32:43,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:32:43,659 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:32:43,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:32:43,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 23:32:43,860 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:32:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:32:43,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1593917350, now seen corresponding path program 1 times [2021-12-06 23:32:43,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:32:43,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422924541] [2021-12-06 23:32:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:32:43,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:32:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:44,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:32:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:44,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:32:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:44,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:32:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:44,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:32:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:44,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 23:32:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:44,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:32:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:44,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:32:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:44,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:32:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 23:32:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:32:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:32:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:32:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:32:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:32:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 23:32:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:32:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:32:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:32:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 23:32:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:32:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 23:32:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:32:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:32:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:32:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:32:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:32:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 23:32:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:32:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 23:32:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:32:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:32:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:32:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 11 proven. 88 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-06 23:32:45,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:32:45,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422924541] [2021-12-06 23:32:45,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422924541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:32:45,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922587566] [2021-12-06 23:32:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:32:45,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:32:45,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:32:45,311 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:32:45,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:32:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:46,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 4007 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 23:32:46,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:32:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-12-06 23:32:48,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:32:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-12-06 23:32:49,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922587566] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:32:49,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:32:49,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16, 6] total 26 [2021-12-06 23:32:49,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263418951] [2021-12-06 23:32:49,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:32:49,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:32:49,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:32:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:32:49,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:32:49,619 INFO L87 Difference]: Start difference. First operand 100454 states and 142926 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 6 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-06 23:32:51,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:32:53,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:32:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:32:59,902 INFO L93 Difference]: Finished difference Result 251770 states and 358732 transitions. [2021-12-06 23:32:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:32:59,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 6 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) Word has length 254 [2021-12-06 23:32:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:33:00,487 INFO L225 Difference]: With dead ends: 251770 [2021-12-06 23:33:00,487 INFO L226 Difference]: Without dead ends: 154186 [2021-12-06 23:33:00,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-12-06 23:33:00,721 INFO L933 BasicCegarLoop]: 1215 mSDtfsCounter, 864 mSDsluCounter, 3892 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 5107 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:33:00,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 5107 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 697 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2021-12-06 23:33:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154186 states. [2021-12-06 23:33:05,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154186 to 153382. [2021-12-06 23:33:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153382 states, 111073 states have (on average 1.332177937032402) internal successors, (147969), 114633 states have internal predecessors, (147969), 32825 states have call successors, (32825), 7890 states have call predecessors, (32825), 9483 states have return successors, (37732), 31820 states have call predecessors, (37732), 32824 states have call successors, (37732) [2021-12-06 23:33:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153382 states to 153382 states and 218526 transitions. [2021-12-06 23:33:06,569 INFO L78 Accepts]: Start accepts. Automaton has 153382 states and 218526 transitions. Word has length 254 [2021-12-06 23:33:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:33:06,569 INFO L470 AbstractCegarLoop]: Abstraction has 153382 states and 218526 transitions. [2021-12-06 23:33:06,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 6 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) [2021-12-06 23:33:06,570 INFO L276 IsEmpty]: Start isEmpty. Operand 153382 states and 218526 transitions. [2021-12-06 23:33:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-06 23:33:06,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:33:06,630 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:33:06,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:33:06,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 23:33:06,832 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:33:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:33:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash -863459029, now seen corresponding path program 1 times [2021-12-06 23:33:06,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:33:06,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373707447] [2021-12-06 23:33:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:33:06,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:33:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:07,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:33:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:07,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:33:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:07,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:33:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:07,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:33:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:07,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 23:33:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:07,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:33:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:07,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:33:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:07,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:33:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 23:33:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:33:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:33:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:33:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:33:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:33:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 23:33:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:33:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:33:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:33:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 23:33:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:33:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 23:33:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:33:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:33:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:33:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:33:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:33:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 23:33:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:33:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 23:33:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:33:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:33:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:33:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-06 23:33:08,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:33:08,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373707447] [2021-12-06 23:33:08,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373707447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:33:08,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896902704] [2021-12-06 23:33:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:33:08,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:33:08,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:33:08,340 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:33:08,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:33:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:33:10,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 4013 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 23:33:10,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:33:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-12-06 23:33:11,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:33:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-12-06 23:33:12,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896902704] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:33:12,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:33:12,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 29 [2021-12-06 23:33:12,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962484617] [2021-12-06 23:33:12,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:33:12,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 23:33:12,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:33:12,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 23:33:12,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-12-06 23:33:12,887 INFO L87 Difference]: Start difference. First operand 153382 states and 218526 transitions. Second operand has 29 states, 29 states have (on average 8.89655172413793) internal successors, (258), 20 states have internal predecessors, (258), 7 states have call successors, (62), 8 states have call predecessors, (62), 8 states have return successors, (57), 10 states have call predecessors, (57), 7 states have call successors, (57) [2021-12-06 23:33:14,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:16,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:18,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:20,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:22,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:27,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:34,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:37,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:39,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:43,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:45,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:47,932 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:49,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:53,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:33:58,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:34:03,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:34:05,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:34:07,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:34:09,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:34:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:34:25,089 INFO L93 Difference]: Finished difference Result 487508 states and 730257 transitions. [2021-12-06 23:34:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 23:34:25,090 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 8.89655172413793) internal successors, (258), 20 states have internal predecessors, (258), 7 states have call successors, (62), 8 states have call predecessors, (62), 8 states have return successors, (57), 10 states have call predecessors, (57), 7 states have call successors, (57) Word has length 258 [2021-12-06 23:34:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:34:26,491 INFO L225 Difference]: With dead ends: 487508 [2021-12-06 23:34:26,491 INFO L226 Difference]: Without dead ends: 324772 [2021-12-06 23:34:27,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 576 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=745, Invalid=5107, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 23:34:27,260 INFO L933 BasicCegarLoop]: 1339 mSDtfsCounter, 2037 mSDsluCounter, 18518 mSDsCounter, 0 mSdLazyCounter, 6890 mSolverCounterSat, 688 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2270 SdHoareTripleChecker+Valid, 19857 SdHoareTripleChecker+Invalid, 7596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 6890 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:34:27,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2270 Valid, 19857 Invalid, 7596 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [688 Valid, 6890 Invalid, 18 Unknown, 0 Unchecked, 58.2s Time] [2021-12-06 23:34:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324772 states. [2021-12-06 23:34:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324772 to 302884. [2021-12-06 23:34:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302884 states, 219581 states have (on average 1.3297370901853987) internal successors, (291985), 227101 states have internal predecessors, (291985), 64051 states have call successors, (64051), 15450 states have call predecessors, (64051), 19251 states have return successors, (76602), 62262 states have call predecessors, (76602), 64050 states have call successors, (76602) [2021-12-06 23:34:38,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302884 states to 302884 states and 432638 transitions. [2021-12-06 23:34:38,765 INFO L78 Accepts]: Start accepts. Automaton has 302884 states and 432638 transitions. Word has length 258 [2021-12-06 23:34:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:34:38,766 INFO L470 AbstractCegarLoop]: Abstraction has 302884 states and 432638 transitions. [2021-12-06 23:34:38,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.89655172413793) internal successors, (258), 20 states have internal predecessors, (258), 7 states have call successors, (62), 8 states have call predecessors, (62), 8 states have return successors, (57), 10 states have call predecessors, (57), 7 states have call successors, (57) [2021-12-06 23:34:38,766 INFO L276 IsEmpty]: Start isEmpty. Operand 302884 states and 432638 transitions. [2021-12-06 23:34:38,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-06 23:34:38,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:34:38,861 INFO L514 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:34:38,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 23:34:39,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 23:34:39,062 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:34:39,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:34:39,063 INFO L85 PathProgramCache]: Analyzing trace with hash -263407287, now seen corresponding path program 1 times [2021-12-06 23:34:39,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:34:39,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677885898] [2021-12-06 23:34:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:34:39,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:34:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:39,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:34:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:39,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:34:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:39,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:34:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:39,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 23:34:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:39,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:34:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:39,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:34:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:39,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:34:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:39,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:34:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:34:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:34:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 23:34:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:34:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 23:34:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:34:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:34:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:34:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 23:34:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:34:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 23:34:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:34:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:34:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:34:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 23:34:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:34:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-06 23:34:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:34:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-06 23:34:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:34:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:34:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:34:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 23:34:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:34:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 10 proven. 119 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-12-06 23:34:40,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:34:40,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677885898] [2021-12-06 23:34:40,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677885898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:34:40,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086572493] [2021-12-06 23:34:40,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:34:40,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:34:40,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:34:40,617 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:34:40,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:34:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:34:42,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 4069 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 23:34:42,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:34:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-12-06 23:34:44,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:34:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-12-06 23:34:45,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086572493] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:34:45,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:34:45,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 9] total 31 [2021-12-06 23:34:45,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101631227] [2021-12-06 23:34:45,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:34:45,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 23:34:45,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:34:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 23:34:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-12-06 23:34:45,820 INFO L87 Difference]: Start difference. First operand 302884 states and 432638 transitions. Second operand has 31 states, 31 states have (on average 8.870967741935484) internal successors, (275), 23 states have internal predecessors, (275), 9 states have call successors, (67), 9 states have call predecessors, (67), 9 states have return successors, (60), 11 states have call predecessors, (60), 9 states have call successors, (60) [2021-12-06 23:34:47,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:34:49,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:34:51,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:34:53,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:34:59,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:07,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:10,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:12,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:16,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:18,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:23,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:25,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:30,718 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:34,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:36,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:40,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:42,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:35:59,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:36:01,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:36:05,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:36:07,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:36:11,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:36:17,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:36:20,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:36:22,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:36:24,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:36:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:36:38,010 INFO L93 Difference]: Finished difference Result 701406 states and 1042025 transitions. [2021-12-06 23:36:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-12-06 23:36:38,011 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 8.870967741935484) internal successors, (275), 23 states have internal predecessors, (275), 9 states have call successors, (67), 9 states have call predecessors, (67), 9 states have return successors, (60), 11 states have call predecessors, (60), 9 states have call successors, (60) Word has length 259 [2021-12-06 23:36:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:36:39,912 INFO L225 Difference]: With dead ends: 701406 [2021-12-06 23:36:39,912 INFO L226 Difference]: Without dead ends: 398532 [2021-12-06 23:36:41,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8107 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=2695, Invalid=19955, Unknown=0, NotChecked=0, Total=22650 [2021-12-06 23:36:41,308 INFO L933 BasicCegarLoop]: 1321 mSDtfsCounter, 5042 mSDsluCounter, 20656 mSDsCounter, 0 mSdLazyCounter, 10110 mSolverCounterSat, 2922 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5267 SdHoareTripleChecker+Valid, 21977 SdHoareTripleChecker+Invalid, 13056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2922 IncrementalHoareTripleChecker+Valid, 10110 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:36:41,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5267 Valid, 21977 Invalid, 13056 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2922 Valid, 10110 Invalid, 24 Unknown, 0 Unchecked, 84.0s Time] [2021-12-06 23:36:41,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398532 states. [2021-12-06 23:36:53,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398532 to 296268. [2021-12-06 23:36:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296268 states, 214899 states have (on average 1.3284054369727174) internal successors, (285473), 222401 states have internal predecessors, (285473), 62433 states have call successors, (62433), 15100 states have call predecessors, (62433), 18935 states have return successors, (74892), 60648 states have call predecessors, (74892), 62432 states have call successors, (74892) [2021-12-06 23:36:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296268 states to 296268 states and 422798 transitions. [2021-12-06 23:36:55,335 INFO L78 Accepts]: Start accepts. Automaton has 296268 states and 422798 transitions. Word has length 259 [2021-12-06 23:36:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:36:55,335 INFO L470 AbstractCegarLoop]: Abstraction has 296268 states and 422798 transitions. [2021-12-06 23:36:55,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.870967741935484) internal successors, (275), 23 states have internal predecessors, (275), 9 states have call successors, (67), 9 states have call predecessors, (67), 9 states have return successors, (60), 11 states have call predecessors, (60), 9 states have call successors, (60) [2021-12-06 23:36:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 296268 states and 422798 transitions. [2021-12-06 23:36:55,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-12-06 23:36:55,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:36:55,416 INFO L514 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:36:55,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 23:36:55,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 23:36:55,619 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:36:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:36:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1684259539, now seen corresponding path program 1 times [2021-12-06 23:36:55,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:36:55,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734389123] [2021-12-06 23:36:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:36:55,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:36:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:55,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:36:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:55,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:36:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:55,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 23:36:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:55,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:36:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:56,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:36:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:56,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:36:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:56,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:36:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:56,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:36:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:36:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:36:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:36:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 23:36:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 23:36:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:36:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:36:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:36:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:36:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 23:36:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 23:36:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:36:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:36:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:36:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:36:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 23:36:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-06 23:36:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:36:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-06 23:36:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:36:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:36:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:36:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:36:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 23:36:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 9 proven. 160 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-12-06 23:36:57,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:36:57,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734389123] [2021-12-06 23:36:57,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734389123] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:36:57,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386815607] [2021-12-06 23:36:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:36:57,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:36:57,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:36:57,526 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:36:57,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e9b981c-657e-4c7b-b00c-e791611ec2d1/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 23:36:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:36:59,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 4127 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 23:36:59,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:37:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-12-06 23:37:01,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:37:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-12-06 23:37:02,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386815607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:37:02,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:37:02,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 32 [2021-12-06 23:37:02,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750660822] [2021-12-06 23:37:02,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:37:02,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 23:37:02,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:37:02,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 23:37:02,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-12-06 23:37:02,607 INFO L87 Difference]: Start difference. First operand 296268 states and 422798 transitions. Second operand has 32 states, 32 states have (on average 8.09375) internal successors, (259), 23 states have internal predecessors, (259), 8 states have call successors, (63), 8 states have call predecessors, (63), 8 states have return successors, (57), 10 states have call predecessors, (57), 8 states have call successors, (57) [2021-12-06 23:37:04,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:06,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:08,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:10,643 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:12,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:17,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:24,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:26,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:28,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:37,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:39,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:45,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:49,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:37:51,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:38:21,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:38:21,456 INFO L93 Difference]: Finished difference Result 686644 states and 1018083 transitions. [2021-12-06 23:38:21,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-06 23:38:21,457 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 8.09375) internal successors, (259), 23 states have internal predecessors, (259), 8 states have call successors, (63), 8 states have call predecessors, (63), 8 states have return successors, (57), 10 states have call predecessors, (57), 8 states have call successors, (57) Word has length 263 [2021-12-06 23:38:21,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:38:23,156 INFO L225 Difference]: With dead ends: 686644 [2021-12-06 23:38:23,157 INFO L226 Difference]: Without dead ends: 387370 [2021-12-06 23:38:24,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7512 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=2036, Invalid=20016, Unknown=0, NotChecked=0, Total=22052 [2021-12-06 23:38:24,472 INFO L933 BasicCegarLoop]: 1419 mSDtfsCounter, 6650 mSDsluCounter, 19987 mSDsCounter, 0 mSdLazyCounter, 7811 mSolverCounterSat, 3125 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7004 SdHoareTripleChecker+Valid, 21406 SdHoareTripleChecker+Invalid, 10948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3125 IncrementalHoareTripleChecker+Valid, 7811 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:38:24,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7004 Valid, 21406 Invalid, 10948 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3125 Valid, 7811 Invalid, 12 Unknown, 0 Unchecked, 53.0s Time] [2021-12-06 23:38:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387370 states. [2021-12-06 23:38:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387370 to 322775. [2021-12-06 23:38:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322775 states, 234317 states have (on average 1.3268008723225375) internal successors, (310892), 242415 states have internal predecessors, (310892), 67877 states have call successors, (67877), 16393 states have call predecessors, (67877), 20580 states have return successors, (81228), 65992 states have call predecessors, (81228), 67876 states have call successors, (81228)