./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL --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 57ba9a4d546a973620a0029f54a814a104db676a0fd0f250dd5545a7c0f94302 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:52:10,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:52:10,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:52:10,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:52:10,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:52:10,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:52:10,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:52:10,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:52:10,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:52:10,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:52:10,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:52:10,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:52:10,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:52:10,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:52:10,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:52:10,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:52:10,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:52:10,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:52:10,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:52:10,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:52:10,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:52:10,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:52:10,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:52:10,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:52:10,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:52:10,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:52:10,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:52:10,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:52:10,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:52:10,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:52:10,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:52:10,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:52:10,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:52:10,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:52:10,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:52:10,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:52:10,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:52:10,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:52:10,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:52:10,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:52:10,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:52:10,434 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-19 04:52:10,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:52:10,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:52:10,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:52:10,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:52:10,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:52:10,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:52:10,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:52:10,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:52:10,488 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:52:10,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:52:10,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:52:10,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:52:10,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:52:10,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:52:10,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:52:10,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:52:10,491 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:52:10,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:52:10,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:52:10,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:52:10,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:52:10,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:52:10,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:52:10,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:52:10,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:52:10,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:52:10,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:52:10,494 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:52:10,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:52:10,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:52:10,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:52:10,496 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_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57ba9a4d546a973620a0029f54a814a104db676a0fd0f250dd5545a7c0f94302 [2021-11-19 04:52:10,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:52:10,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:52:10,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:52:10,839 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:52:10,839 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:52:10,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2021-11-19 04:52:10,936 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/data/d43b0134f/2bbb8f8039d94d89a8d1971d08602638/FLAG6c8792fbe [2021-11-19 04:52:11,655 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:52:11,656 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2021-11-19 04:52:11,695 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/data/d43b0134f/2bbb8f8039d94d89a8d1971d08602638/FLAG6c8792fbe [2021-11-19 04:52:11,772 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/data/d43b0134f/2bbb8f8039d94d89a8d1971d08602638 [2021-11-19 04:52:11,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:52:11,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:52:11,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:52:11,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:52:11,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:52:11,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:52:11" (1/1) ... [2021-11-19 04:52:11,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36b0c37b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:11, skipping insertion in model container [2021-11-19 04:52:11,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:52:11" (1/1) ... [2021-11-19 04:52:11,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:52:11,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:52:12,607 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_3139fec6-3c4c-4996-b68b-5c12783c13d8/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i[101600,101613] [2021-11-19 04:52:12,883 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:52:12,916 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:52:13,075 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_3139fec6-3c4c-4996-b68b-5c12783c13d8/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i[101600,101613] [2021-11-19 04:52:13,165 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:52:13,221 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:52:13,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:13 WrapperNode [2021-11-19 04:52:13,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:52:13,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:52:13,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:52:13,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:52:13,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:13" (1/1) ... [2021-11-19 04:52:13,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:13" (1/1) ... [2021-11-19 04:52:13,392 INFO L137 Inliner]: procedures = 113, calls = 417, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1222 [2021-11-19 04:52:13,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:52:13,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:52:13,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:52:13,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:52:13,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:13" (1/1) ... [2021-11-19 04:52:13,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:13" (1/1) ... [2021-11-19 04:52:13,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:13" (1/1) ... [2021-11-19 04:52:13,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:13" (1/1) ... [2021-11-19 04:52:13,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:13" (1/1) ... [2021-11-19 04:52:13,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:13" (1/1) ... [2021-11-19 04:52:13,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:13" (1/1) ... [2021-11-19 04:52:13,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:52:13,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:52:13,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:52:13,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:52:13,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:13" (1/1) ... [2021-11-19 04:52:13,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:52:13,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:13,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:52:13,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:52:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-19 04:52:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 04:52:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 04:52:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 04:52:13,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 04:52:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:52:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 04:52:13,610 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 04:52:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-19 04:52:13,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-19 04:52:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 04:52:13,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 04:52:13,611 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 04:52:13,611 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 04:52:13,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:52:13,611 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-19 04:52:13,611 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-19 04:52:13,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-19 04:52:13,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-19 04:52:13,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 04:52:13,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 04:52:13,612 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 04:52:13,612 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 04:52:13,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:52:13,613 INFO L130 BoogieDeclarations]: Found specification of procedure idmouse_resume [2021-11-19 04:52:13,613 INFO L138 BoogieDeclarations]: Found implementation of procedure idmouse_resume [2021-11-19 04:52:13,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-19 04:52:13,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-19 04:52:13,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_2 [2021-11-19 04:52:13,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_2 [2021-11-19 04:52:13,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:52:13,614 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-19 04:52:13,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-19 04:52:13,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:52:13,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:52:13,615 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-19 04:52:13,615 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_5 [2021-11-19 04:52:13,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_5 [2021-11-19 04:52:13,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:52:13,615 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-19 04:52:13,615 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-19 04:52:13,616 INFO L130 BoogieDeclarations]: Found specification of procedure idmouse_disconnect [2021-11-19 04:52:13,616 INFO L138 BoogieDeclarations]: Found implementation of procedure idmouse_disconnect [2021-11-19 04:52:13,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:52:13,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 04:52:13,616 INFO L130 BoogieDeclarations]: Found specification of procedure idmouse_delete [2021-11-19 04:52:13,616 INFO L138 BoogieDeclarations]: Found implementation of procedure idmouse_delete [2021-11-19 04:52:13,617 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-19 04:52:13,617 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-19 04:52:13,617 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-19 04:52:13,617 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-19 04:52:13,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:52:13,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-19 04:52:13,618 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-19 04:52:13,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-19 04:52:13,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:52:13,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:52:14,056 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:52:14,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:52:14,194 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 04:52:14,382 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-19 04:52:15,087 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:52:15,107 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:52:15,107 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 04:52:15,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:15 BoogieIcfgContainer [2021-11-19 04:52:15,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:52:15,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:52:15,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:52:15,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:52:15,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:52:11" (1/3) ... [2021-11-19 04:52:15,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241e8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:52:15, skipping insertion in model container [2021-11-19 04:52:15,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:13" (2/3) ... [2021-11-19 04:52:15,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241e8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:52:15, skipping insertion in model container [2021-11-19 04:52:15,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:15" (3/3) ... [2021-11-19 04:52:15,119 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2021-11-19 04:52:15,125 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:52:15,125 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:52:15,182 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:52:15,187 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:52:15,187 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:52:15,231 INFO L276 IsEmpty]: Start isEmpty. Operand has 358 states, 256 states have (on average 1.375) internal successors, (352), 271 states have internal predecessors, (352), 82 states have call successors, (82), 20 states have call predecessors, (82), 18 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) [2021-11-19 04:52:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:52:15,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:15,241 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] [2021-11-19 04:52:15,241 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:15,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:15,245 INFO L85 PathProgramCache]: Analyzing trace with hash -536575566, now seen corresponding path program 1 times [2021-11-19 04:52:15,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:15,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992155983] [2021-11-19 04:52:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:15,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:15,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:15,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:15,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:52:15,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:15,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992155983] [2021-11-19 04:52:15,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992155983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:15,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:15,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:52:15,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494275508] [2021-11-19 04:52:15,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:15,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:52:15,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:15,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:52:15,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:52:15,942 INFO L87 Difference]: Start difference. First operand has 358 states, 256 states have (on average 1.375) internal successors, (352), 271 states have internal predecessors, (352), 82 states have call successors, (82), 20 states have call predecessors, (82), 18 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-11-19 04:52:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:17,026 INFO L93 Difference]: Finished difference Result 1050 states and 1526 transitions. [2021-11-19 04:52:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:52:17,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 36 [2021-11-19 04:52:17,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:17,063 INFO L225 Difference]: With dead ends: 1050 [2021-11-19 04:52:17,064 INFO L226 Difference]: Without dead ends: 675 [2021-11-19 04:52:17,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:17,087 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 477 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:17,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 1266 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:52:17,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-11-19 04:52:17,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 648. [2021-11-19 04:52:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 473 states have (on average 1.3488372093023255) internal successors, (638), 482 states have internal predecessors, (638), 140 states have call successors, (140), 35 states have call predecessors, (140), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2021-11-19 04:52:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 912 transitions. [2021-11-19 04:52:17,241 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 912 transitions. Word has length 36 [2021-11-19 04:52:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:17,242 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 912 transitions. [2021-11-19 04:52:17,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-11-19 04:52:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 912 transitions. [2021-11-19 04:52:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 04:52:17,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:17,247 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:17,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:52:17,248 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash -981122542, now seen corresponding path program 1 times [2021-11-19 04:52:17,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:17,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087081999] [2021-11-19 04:52:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:17,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 04:52:17,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:17,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087081999] [2021-11-19 04:52:17,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087081999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:17,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:17,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:52:17,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193395262] [2021-11-19 04:52:17,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:17,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:52:17,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:17,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:52:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:52:17,500 INFO L87 Difference]: Start difference. First operand 648 states and 912 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:52:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:17,978 INFO L93 Difference]: Finished difference Result 674 states and 953 transitions. [2021-11-19 04:52:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:52:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-11-19 04:52:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:17,985 INFO L225 Difference]: With dead ends: 674 [2021-11-19 04:52:17,985 INFO L226 Difference]: Without dead ends: 671 [2021-11-19 04:52:17,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:17,987 INFO L933 BasicCegarLoop]: 468 mSDtfsCounter, 445 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:17,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 721 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-11-19 04:52:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 647. [2021-11-19 04:52:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 473 states have (on average 1.346723044397463) internal successors, (637), 481 states have internal predecessors, (637), 139 states have call successors, (139), 35 states have call predecessors, (139), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2021-11-19 04:52:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 910 transitions. [2021-11-19 04:52:18,061 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 910 transitions. Word has length 46 [2021-11-19 04:52:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:18,061 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 910 transitions. [2021-11-19 04:52:18,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:52:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 910 transitions. [2021-11-19 04:52:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 04:52:18,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:18,075 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:18,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:52:18,076 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:18,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:18,077 INFO L85 PathProgramCache]: Analyzing trace with hash -350236783, now seen corresponding path program 1 times [2021-11-19 04:52:18,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:18,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660281169] [2021-11-19 04:52:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:18,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 04:52:18,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:18,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660281169] [2021-11-19 04:52:18,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660281169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:18,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:18,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:52:18,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286149664] [2021-11-19 04:52:18,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:18,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:52:18,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:52:18,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:52:18,244 INFO L87 Difference]: Start difference. First operand 647 states and 910 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:52:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:18,711 INFO L93 Difference]: Finished difference Result 673 states and 951 transitions. [2021-11-19 04:52:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:52:18,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2021-11-19 04:52:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:18,717 INFO L225 Difference]: With dead ends: 673 [2021-11-19 04:52:18,717 INFO L226 Difference]: Without dead ends: 670 [2021-11-19 04:52:18,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:18,719 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 442 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:18,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 718 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-11-19 04:52:18,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 646. [2021-11-19 04:52:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 473 states have (on average 1.3446088794926003) internal successors, (636), 480 states have internal predecessors, (636), 138 states have call successors, (138), 35 states have call predecessors, (138), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2021-11-19 04:52:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 908 transitions. [2021-11-19 04:52:18,769 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 908 transitions. Word has length 47 [2021-11-19 04:52:18,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:18,769 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 908 transitions. [2021-11-19 04:52:18,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:52:18,770 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 908 transitions. [2021-11-19 04:52:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:52:18,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:18,772 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:18,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:52:18,772 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:18,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2027357429, now seen corresponding path program 1 times [2021-11-19 04:52:18,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:18,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371614143] [2021-11-19 04:52:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:18,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 04:52:18,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:18,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371614143] [2021-11-19 04:52:18,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371614143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:18,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:18,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:52:18,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741283526] [2021-11-19 04:52:18,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:18,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:52:18,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:52:18,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:52:18,894 INFO L87 Difference]: Start difference. First operand 646 states and 908 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:52:19,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:19,386 INFO L93 Difference]: Finished difference Result 672 states and 949 transitions. [2021-11-19 04:52:19,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:52:19,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-11-19 04:52:19,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:19,394 INFO L225 Difference]: With dead ends: 672 [2021-11-19 04:52:19,394 INFO L226 Difference]: Without dead ends: 669 [2021-11-19 04:52:19,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:19,397 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 439 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:19,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 715 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-11-19 04:52:19,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 645. [2021-11-19 04:52:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 473 states have (on average 1.342494714587738) internal successors, (635), 479 states have internal predecessors, (635), 137 states have call successors, (137), 35 states have call predecessors, (137), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2021-11-19 04:52:19,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 906 transitions. [2021-11-19 04:52:19,456 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 906 transitions. Word has length 48 [2021-11-19 04:52:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:19,458 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 906 transitions. [2021-11-19 04:52:19,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:52:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 906 transitions. [2021-11-19 04:52:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 04:52:19,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:19,460 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:19,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:52:19,461 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:19,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:19,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1576628460, now seen corresponding path program 1 times [2021-11-19 04:52:19,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:19,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244204907] [2021-11-19 04:52:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:19,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 04:52:19,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:19,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244204907] [2021-11-19 04:52:19,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244204907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:19,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:19,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:52:19,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821875686] [2021-11-19 04:52:19,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:19,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:52:19,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:19,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:52:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:52:19,634 INFO L87 Difference]: Start difference. First operand 645 states and 906 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:52:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:20,414 INFO L93 Difference]: Finished difference Result 1952 states and 2756 transitions. [2021-11-19 04:52:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:52:20,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2021-11-19 04:52:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:20,425 INFO L225 Difference]: With dead ends: 1952 [2021-11-19 04:52:20,425 INFO L226 Difference]: Without dead ends: 1318 [2021-11-19 04:52:20,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:20,429 INFO L933 BasicCegarLoop]: 639 mSDtfsCounter, 463 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:20,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1374 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:52:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-11-19 04:52:20,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1266. [2021-11-19 04:52:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 929 states have (on average 1.3444564047362755) internal successors, (1249), 939 states have internal predecessors, (1249), 268 states have call successors, (268), 69 states have call predecessors, (268), 68 states have return successors, (265), 257 states have call predecessors, (265), 265 states have call successors, (265) [2021-11-19 04:52:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1782 transitions. [2021-11-19 04:52:20,523 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1782 transitions. Word has length 49 [2021-11-19 04:52:20,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:20,524 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1782 transitions. [2021-11-19 04:52:20,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:52:20,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1782 transitions. [2021-11-19 04:52:20,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:52:20,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:20,526 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:20,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:52:20,526 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1631036456, now seen corresponding path program 1 times [2021-11-19 04:52:20,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:20,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388959065] [2021-11-19 04:52:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:20,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:20,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:20,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:20,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:20,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 04:52:20,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:20,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388959065] [2021-11-19 04:52:20,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388959065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:20,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:20,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:52:20,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503732385] [2021-11-19 04:52:20,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:20,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:52:20,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:20,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:52:20,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:52:20,640 INFO L87 Difference]: Start difference. First operand 1266 states and 1782 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:52:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:21,136 INFO L93 Difference]: Finished difference Result 1316 states and 1860 transitions. [2021-11-19 04:52:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:52:21,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2021-11-19 04:52:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:21,146 INFO L225 Difference]: With dead ends: 1316 [2021-11-19 04:52:21,146 INFO L226 Difference]: Without dead ends: 1304 [2021-11-19 04:52:21,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:21,148 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 435 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:21,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 714 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-11-19 04:52:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1256. [2021-11-19 04:52:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 920 states have (on average 1.3434782608695652) internal successors, (1236), 929 states have internal predecessors, (1236), 267 states have call successors, (267), 69 states have call predecessors, (267), 68 states have return successors, (265), 257 states have call predecessors, (265), 265 states have call successors, (265) [2021-11-19 04:52:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1768 transitions. [2021-11-19 04:52:21,257 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1768 transitions. Word has length 50 [2021-11-19 04:52:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:21,257 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1768 transitions. [2021-11-19 04:52:21,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:52:21,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1768 transitions. [2021-11-19 04:52:21,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 04:52:21,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:21,263 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-19 04:52:21,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:52:21,263 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1468685094, now seen corresponding path program 1 times [2021-11-19 04:52:21,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:21,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121320261] [2021-11-19 04:52:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:21,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 04:52:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:52:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-19 04:52:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:52:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 04:52:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-19 04:52:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:52:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:52:21,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:21,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121320261] [2021-11-19 04:52:21,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121320261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:21,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:21,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:52:21,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160645421] [2021-11-19 04:52:21,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:21,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:52:21,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:21,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:52:21,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:21,416 INFO L87 Difference]: Start difference. First operand 1256 states and 1768 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 04:52:22,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:22,173 INFO L93 Difference]: Finished difference Result 3199 states and 4459 transitions. [2021-11-19 04:52:22,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:52:22,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2021-11-19 04:52:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:22,188 INFO L225 Difference]: With dead ends: 3199 [2021-11-19 04:52:22,188 INFO L226 Difference]: Without dead ends: 1954 [2021-11-19 04:52:22,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:22,193 INFO L933 BasicCegarLoop]: 494 mSDtfsCounter, 286 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:22,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 1445 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:52:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2021-11-19 04:52:22,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1841. [2021-11-19 04:52:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1357 states have (on average 1.3352984524686808) internal successors, (1812), 1370 states have internal predecessors, (1812), 368 states have call successors, (368), 116 states have call predecessors, (368), 115 states have return successors, (366), 354 states have call predecessors, (366), 366 states have call successors, (366) [2021-11-19 04:52:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2546 transitions. [2021-11-19 04:52:22,353 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2546 transitions. Word has length 107 [2021-11-19 04:52:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:22,354 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2546 transitions. [2021-11-19 04:52:22,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 04:52:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2546 transitions. [2021-11-19 04:52:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 04:52:22,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:22,360 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 04:52:22,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:52:22,361 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:22,361 INFO L85 PathProgramCache]: Analyzing trace with hash 188231278, now seen corresponding path program 1 times [2021-11-19 04:52:22,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:22,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795217418] [2021-11-19 04:52:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:22,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 04:52:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-19 04:52:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:52:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-19 04:52:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:52:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-19 04:52:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-19 04:52:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 04:52:22,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:22,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795217418] [2021-11-19 04:52:22,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795217418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:22,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631548399] [2021-11-19 04:52:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:22,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:22,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:22,593 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:22,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:52:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:22,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:52:22,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 04:52:23,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:52:23,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631548399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:23,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:52:23,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2021-11-19 04:52:23,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165815206] [2021-11-19 04:52:23,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:23,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:52:23,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:23,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:52:23,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:23,393 INFO L87 Difference]: Start difference. First operand 1841 states and 2546 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 04:52:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:23,919 INFO L93 Difference]: Finished difference Result 5492 states and 7596 transitions. [2021-11-19 04:52:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:52:23,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 129 [2021-11-19 04:52:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:23,959 INFO L225 Difference]: With dead ends: 5492 [2021-11-19 04:52:23,960 INFO L226 Difference]: Without dead ends: 5481 [2021-11-19 04:52:23,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:23,964 INFO L933 BasicCegarLoop]: 982 mSDtfsCounter, 836 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:23,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 1754 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:52:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2021-11-19 04:52:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 5433. [2021-11-19 04:52:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 3997 states have (on average 1.3400050037528146) internal successors, (5356), 4058 states have internal predecessors, (5356), 1092 states have call successors, (1092), 344 states have call predecessors, (1092), 343 states have return successors, (1090), 1030 states have call predecessors, (1090), 1090 states have call successors, (1090) [2021-11-19 04:52:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 7538 transitions. [2021-11-19 04:52:24,363 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 7538 transitions. Word has length 129 [2021-11-19 04:52:24,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:24,364 INFO L470 AbstractCegarLoop]: Abstraction has 5433 states and 7538 transitions. [2021-11-19 04:52:24,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 04:52:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 7538 transitions. [2021-11-19 04:52:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 04:52:24,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:24,378 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 04:52:24,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:24,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:24,600 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:24,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1400116624, now seen corresponding path program 1 times [2021-11-19 04:52:24,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:24,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452944106] [2021-11-19 04:52:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:24,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 04:52:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-19 04:52:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:52:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-19 04:52:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:52:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-19 04:52:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-19 04:52:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 04:52:24,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:24,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452944106] [2021-11-19 04:52:24,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452944106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:24,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:24,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:52:24,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425811207] [2021-11-19 04:52:24,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:24,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:52:24,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:24,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:52:24,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:24,909 INFO L87 Difference]: Start difference. First operand 5433 states and 7538 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 04:52:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:26,080 INFO L93 Difference]: Finished difference Result 13663 states and 19545 transitions. [2021-11-19 04:52:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:52:26,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 129 [2021-11-19 04:52:26,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:26,142 INFO L225 Difference]: With dead ends: 13663 [2021-11-19 04:52:26,142 INFO L226 Difference]: Without dead ends: 8248 [2021-11-19 04:52:26,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:52:26,159 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 415 mSDsluCounter, 2603 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 3286 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:26,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 3286 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:52:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-11-19 04:52:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 5493. [2021-11-19 04:52:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 4045 states have (on average 1.3359703337453646) internal successors, (5404), 4106 states have internal predecessors, (5404), 1092 states have call successors, (1092), 344 states have call predecessors, (1092), 355 states have return successors, (1126), 1042 states have call predecessors, (1126), 1090 states have call successors, (1126) [2021-11-19 04:52:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 7622 transitions. [2021-11-19 04:52:26,629 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 7622 transitions. Word has length 129 [2021-11-19 04:52:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:26,629 INFO L470 AbstractCegarLoop]: Abstraction has 5493 states and 7622 transitions. [2021-11-19 04:52:26,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 04:52:26,630 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 7622 transitions. [2021-11-19 04:52:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 04:52:26,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:26,643 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-19 04:52:26,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:52:26,644 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:26,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1120717474, now seen corresponding path program 1 times [2021-11-19 04:52:26,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:26,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961140782] [2021-11-19 04:52:26,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:26,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 04:52:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-19 04:52:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:52:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-19 04:52:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-19 04:52:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-19 04:52:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-19 04:52:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 04:52:26,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:26,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961140782] [2021-11-19 04:52:26,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961140782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:26,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:26,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:52:26,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825800659] [2021-11-19 04:52:26,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:26,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:52:26,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:26,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:52:26,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:52:26,989 INFO L87 Difference]: Start difference. First operand 5493 states and 7622 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 04:52:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:28,747 INFO L93 Difference]: Finished difference Result 15501 states and 22090 transitions. [2021-11-19 04:52:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:52:28,748 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 135 [2021-11-19 04:52:28,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:28,827 INFO L225 Difference]: With dead ends: 15501 [2021-11-19 04:52:28,828 INFO L226 Difference]: Without dead ends: 10026 [2021-11-19 04:52:28,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:52:28,847 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 643 mSDsluCounter, 3312 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 4021 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:28,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 4021 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:52:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10026 states. [2021-11-19 04:52:29,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10026 to 7278. [2021-11-19 04:52:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7278 states, 5416 states have (on average 1.3389955686853767) internal successors, (7252), 5511 states have internal predecessors, (7252), 1389 states have call successors, (1389), 467 states have call predecessors, (1389), 472 states have return successors, (1441), 1299 states have call predecessors, (1441), 1387 states have call successors, (1441) [2021-11-19 04:52:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7278 states to 7278 states and 10082 transitions. [2021-11-19 04:52:29,469 INFO L78 Accepts]: Start accepts. Automaton has 7278 states and 10082 transitions. Word has length 135 [2021-11-19 04:52:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:29,470 INFO L470 AbstractCegarLoop]: Abstraction has 7278 states and 10082 transitions. [2021-11-19 04:52:29,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 04:52:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 7278 states and 10082 transitions. [2021-11-19 04:52:29,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 04:52:29,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:29,495 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:29,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:52:29,495 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:29,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1875261395, now seen corresponding path program 1 times [2021-11-19 04:52:29,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:29,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569084723] [2021-11-19 04:52:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:29,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 04:52:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:52:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:52:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:52:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:52:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 04:52:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:52:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-19 04:52:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:52:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:52:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-19 04:52:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-19 04:52:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-19 04:52:29,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:29,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569084723] [2021-11-19 04:52:29,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569084723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:29,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:29,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:29,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343033035] [2021-11-19 04:52:29,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:29,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:29,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:29,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:29,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:29,759 INFO L87 Difference]: Start difference. First operand 7278 states and 10082 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 04:52:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:31,704 INFO L93 Difference]: Finished difference Result 18959 states and 26435 transitions. [2021-11-19 04:52:31,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:52:31,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 179 [2021-11-19 04:52:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:31,753 INFO L225 Difference]: With dead ends: 18959 [2021-11-19 04:52:31,754 INFO L226 Difference]: Without dead ends: 11699 [2021-11-19 04:52:31,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:31,779 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 489 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 2162 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:31,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 2162 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 04:52:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11699 states. [2021-11-19 04:52:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11699 to 11036. [2021-11-19 04:52:32,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11036 states, 8377 states have (on average 1.3416497552823206) internal successors, (11239), 8486 states have internal predecessors, (11239), 1969 states have call successors, (1969), 664 states have call predecessors, (1969), 689 states have return successors, (2039), 1885 states have call predecessors, (2039), 1967 states have call successors, (2039) [2021-11-19 04:52:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11036 states to 11036 states and 15247 transitions. [2021-11-19 04:52:32,633 INFO L78 Accepts]: Start accepts. Automaton has 11036 states and 15247 transitions. Word has length 179 [2021-11-19 04:52:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:32,634 INFO L470 AbstractCegarLoop]: Abstraction has 11036 states and 15247 transitions. [2021-11-19 04:52:32,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 04:52:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 11036 states and 15247 transitions. [2021-11-19 04:52:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 04:52:32,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:32,666 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:32,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:52:32,666 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:32,667 INFO L85 PathProgramCache]: Analyzing trace with hash 385149395, now seen corresponding path program 2 times [2021-11-19 04:52:32,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:32,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967057674] [2021-11-19 04:52:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:32,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:52:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:52:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:52:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:52:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-19 04:52:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-19 04:52:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-19 04:52:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 04:52:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:52:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-19 04:52:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:52:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:52:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-19 04:52:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-19 04:52:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 04:52:32,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:32,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967057674] [2021-11-19 04:52:32,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967057674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:32,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:32,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:32,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566749284] [2021-11-19 04:52:32,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:32,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:32,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:32,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:32,920 INFO L87 Difference]: Start difference. First operand 11036 states and 15247 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 04:52:34,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:34,912 INFO L93 Difference]: Finished difference Result 25811 states and 35757 transitions. [2021-11-19 04:52:34,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:52:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2021-11-19 04:52:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:34,977 INFO L225 Difference]: With dead ends: 25811 [2021-11-19 04:52:34,977 INFO L226 Difference]: Without dead ends: 14797 [2021-11-19 04:52:35,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:52:35,012 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 424 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 2125 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:35,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 2125 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 04:52:35,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14797 states. [2021-11-19 04:52:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14797 to 14270. [2021-11-19 04:52:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14270 states, 10819 states have (on average 1.3431001016729827) internal successors, (14531), 10958 states have internal predecessors, (14531), 2569 states have call successors, (2569), 838 states have call predecessors, (2569), 881 states have return successors, (2657), 2473 states have call predecessors, (2657), 2567 states have call successors, (2657) [2021-11-19 04:52:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14270 states to 14270 states and 19757 transitions. [2021-11-19 04:52:36,074 INFO L78 Accepts]: Start accepts. Automaton has 14270 states and 19757 transitions. Word has length 179 [2021-11-19 04:52:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:36,075 INFO L470 AbstractCegarLoop]: Abstraction has 14270 states and 19757 transitions. [2021-11-19 04:52:36,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 04:52:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 14270 states and 19757 transitions. [2021-11-19 04:52:36,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 04:52:36,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:36,119 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:36,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:52:36,120 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:36,120 INFO L85 PathProgramCache]: Analyzing trace with hash -734080811, now seen corresponding path program 1 times [2021-11-19 04:52:36,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:36,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5724410] [2021-11-19 04:52:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:36,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:52:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:52:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:52:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 04:52:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:52:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-19 04:52:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:52:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:52:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-19 04:52:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-19 04:52:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 04:52:36,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:36,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5724410] [2021-11-19 04:52:36,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5724410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:36,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:36,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:36,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147957310] [2021-11-19 04:52:36,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:36,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:36,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:36,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:36,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:36,368 INFO L87 Difference]: Start difference. First operand 14270 states and 19757 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 04:52:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:38,976 INFO L93 Difference]: Finished difference Result 39420 states and 55769 transitions. [2021-11-19 04:52:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:52:38,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 179 [2021-11-19 04:52:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:39,093 INFO L225 Difference]: With dead ends: 39420 [2021-11-19 04:52:39,093 INFO L226 Difference]: Without dead ends: 28377 [2021-11-19 04:52:39,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:52:39,138 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 893 mSDsluCounter, 1845 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 2628 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:39,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 2628 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 04:52:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28377 states. [2021-11-19 04:52:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28377 to 14302. [2021-11-19 04:52:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14302 states, 10851 states have (on average 1.342088286793844) internal successors, (14563), 10990 states have internal predecessors, (14563), 2569 states have call successors, (2569), 838 states have call predecessors, (2569), 881 states have return successors, (2657), 2473 states have call predecessors, (2657), 2567 states have call successors, (2657) [2021-11-19 04:52:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14302 states to 14302 states and 19789 transitions. [2021-11-19 04:52:40,662 INFO L78 Accepts]: Start accepts. Automaton has 14302 states and 19789 transitions. Word has length 179 [2021-11-19 04:52:40,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:40,664 INFO L470 AbstractCegarLoop]: Abstraction has 14302 states and 19789 transitions. [2021-11-19 04:52:40,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 04:52:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 14302 states and 19789 transitions. [2021-11-19 04:52:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-19 04:52:40,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:40,701 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:40,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 04:52:40,701 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:40,702 INFO L85 PathProgramCache]: Analyzing trace with hash -814466245, now seen corresponding path program 1 times [2021-11-19 04:52:40,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:40,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069613536] [2021-11-19 04:52:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:40,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-19 04:52:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-19 04:52:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-19 04:52:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 04:52:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-19 04:52:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-19 04:52:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 04:52:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 04:52:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-19 04:52:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-19 04:52:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 04:52:40,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:40,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069613536] [2021-11-19 04:52:40,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069613536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:40,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:40,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:52:40,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701394376] [2021-11-19 04:52:40,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:40,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:52:40,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:40,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:52:40,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:52:40,906 INFO L87 Difference]: Start difference. First operand 14302 states and 19789 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-19 04:52:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:42,572 INFO L93 Difference]: Finished difference Result 30158 states and 41553 transitions. [2021-11-19 04:52:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:52:42,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 188 [2021-11-19 04:52:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:42,699 INFO L225 Difference]: With dead ends: 30158 [2021-11-19 04:52:42,700 INFO L226 Difference]: Without dead ends: 15878 [2021-11-19 04:52:42,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:52:42,729 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 485 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:42,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 1608 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:52:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15878 states. [2021-11-19 04:52:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15878 to 15337. [2021-11-19 04:52:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15337 states, 11815 states have (on average 1.3262801523487093) internal successors, (15670), 11910 states have internal predecessors, (15670), 2513 states have call successors, (2513), 969 states have call predecessors, (2513), 1008 states have return successors, (2591), 2457 states have call predecessors, (2591), 2511 states have call successors, (2591) [2021-11-19 04:52:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15337 states to 15337 states and 20774 transitions. [2021-11-19 04:52:43,948 INFO L78 Accepts]: Start accepts. Automaton has 15337 states and 20774 transitions. Word has length 188 [2021-11-19 04:52:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:43,949 INFO L470 AbstractCegarLoop]: Abstraction has 15337 states and 20774 transitions. [2021-11-19 04:52:43,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (19), 5 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-19 04:52:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 15337 states and 20774 transitions. [2021-11-19 04:52:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-19 04:52:43,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:43,977 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:43,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:52:43,977 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:43,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:43,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1116840713, now seen corresponding path program 2 times [2021-11-19 04:52:43,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:43,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758548828] [2021-11-19 04:52:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:43,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:52:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:52:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:52:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 04:52:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:52:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-19 04:52:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:52:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:52:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-19 04:52:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-19 04:52:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 04:52:44,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:44,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758548828] [2021-11-19 04:52:44,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758548828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:44,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110350531] [2021-11-19 04:52:44,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:52:44,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:44,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:44,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:44,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:52:44,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:52:44,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:52:44,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:52:44,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 67 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 04:52:45,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 04:52:45,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110350531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:45,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:45,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 9 [2021-11-19 04:52:45,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349636665] [2021-11-19 04:52:45,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:45,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:52:45,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:45,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:52:45,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:52:45,955 INFO L87 Difference]: Start difference. First operand 15337 states and 20774 transitions. Second operand has 9 states, 9 states have (on average 21.88888888888889) internal successors, (197), 6 states have internal predecessors, (197), 5 states have call successors, (45), 7 states have call predecessors, (45), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-19 04:52:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:49,397 INFO L93 Difference]: Finished difference Result 28734 states and 38755 transitions. [2021-11-19 04:52:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 04:52:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.88888888888889) internal successors, (197), 6 states have internal predecessors, (197), 5 states have call successors, (45), 7 states have call predecessors, (45), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 188 [2021-11-19 04:52:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:49,520 INFO L225 Difference]: With dead ends: 28734 [2021-11-19 04:52:49,520 INFO L226 Difference]: Without dead ends: 28723 [2021-11-19 04:52:49,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 418 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:52:49,532 INFO L933 BasicCegarLoop]: 1226 mSDtfsCounter, 1629 mSDsluCounter, 2722 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 3948 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:49,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 3948 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 04:52:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28723 states. [2021-11-19 04:52:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28723 to 14444. [2021-11-19 04:52:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14444 states, 11113 states have (on average 1.3267344551426257) internal successors, (14744), 11205 states have internal predecessors, (14744), 2383 states have call successors, (2383), 915 states have call predecessors, (2383), 947 states have return successors, (2457), 2323 states have call predecessors, (2457), 2381 states have call successors, (2457) [2021-11-19 04:52:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14444 states to 14444 states and 19584 transitions. [2021-11-19 04:52:51,039 INFO L78 Accepts]: Start accepts. Automaton has 14444 states and 19584 transitions. Word has length 188 [2021-11-19 04:52:51,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:51,040 INFO L470 AbstractCegarLoop]: Abstraction has 14444 states and 19584 transitions. [2021-11-19 04:52:51,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.88888888888889) internal successors, (197), 6 states have internal predecessors, (197), 5 states have call successors, (45), 7 states have call predecessors, (45), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-19 04:52:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 14444 states and 19584 transitions. [2021-11-19 04:52:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-19 04:52:51,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:51,066 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:51,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:51,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 04:52:51,288 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash -705168335, now seen corresponding path program 1 times [2021-11-19 04:52:51,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:51,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063179889] [2021-11-19 04:52:51,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:51,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:52:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:52:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:52:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 04:52:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:52:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-19 04:52:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:52:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:52:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-19 04:52:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-19 04:52:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-19 04:52:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 04:52:51,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:51,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063179889] [2021-11-19 04:52:51,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063179889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:51,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:51,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:52:51,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091142843] [2021-11-19 04:52:51,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:51,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:52:51,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:51,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:52:51,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:52:51,592 INFO L87 Difference]: Start difference. First operand 14444 states and 19584 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (20), 5 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 04:52:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:52,687 INFO L93 Difference]: Finished difference Result 21976 states and 29885 transitions. [2021-11-19 04:52:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:52:52,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (20), 5 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 189 [2021-11-19 04:52:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:52,718 INFO L225 Difference]: With dead ends: 21976 [2021-11-19 04:52:52,718 INFO L226 Difference]: Without dead ends: 7014 [2021-11-19 04:52:52,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:52:52,746 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 453 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:52,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 1522 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:52:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-11-19 04:52:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6549. [2021-11-19 04:52:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6549 states, 5036 states have (on average 1.3157267672756157) internal successors, (6626), 5080 states have internal predecessors, (6626), 1087 states have call successors, (1087), 412 states have call predecessors, (1087), 425 states have return successors, (1121), 1056 states have call predecessors, (1121), 1085 states have call successors, (1121) [2021-11-19 04:52:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6549 states to 6549 states and 8834 transitions. [2021-11-19 04:52:53,367 INFO L78 Accepts]: Start accepts. Automaton has 6549 states and 8834 transitions. Word has length 189 [2021-11-19 04:52:53,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:53,368 INFO L470 AbstractCegarLoop]: Abstraction has 6549 states and 8834 transitions. [2021-11-19 04:52:53,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (20), 5 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 04:52:53,368 INFO L276 IsEmpty]: Start isEmpty. Operand 6549 states and 8834 transitions. [2021-11-19 04:52:53,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-19 04:52:53,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:53,381 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:53,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 04:52:53,382 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:53,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1027767052, now seen corresponding path program 1 times [2021-11-19 04:52:53,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:53,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126502862] [2021-11-19 04:52:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:53,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:52:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-19 04:52:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:52:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:52:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:52:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:52:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-19 04:52:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-19 04:52:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-19 04:52:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-11-19 04:52:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-19 04:52:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-19 04:52:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-19 04:52:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-19 04:52:53,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:53,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126502862] [2021-11-19 04:52:53,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126502862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:53,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:53,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:52:53,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744817343] [2021-11-19 04:52:53,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:53,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:52:53,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:52:53,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:53,625 INFO L87 Difference]: Start difference. First operand 6549 states and 8834 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 04:52:55,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:55,806 INFO L93 Difference]: Finished difference Result 16524 states and 22262 transitions. [2021-11-19 04:52:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:52:55,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 197 [2021-11-19 04:52:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:55,837 INFO L225 Difference]: With dead ends: 16524 [2021-11-19 04:52:55,837 INFO L226 Difference]: Without dead ends: 10374 [2021-11-19 04:52:55,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:52:55,851 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 659 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 3098 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:55,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 3098 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 04:52:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10374 states. [2021-11-19 04:52:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10374 to 6591. [2021-11-19 04:52:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6591 states, 5078 states have (on average 1.3131153997636864) internal successors, (6668), 5122 states have internal predecessors, (6668), 1087 states have call successors, (1087), 412 states have call predecessors, (1087), 425 states have return successors, (1121), 1056 states have call predecessors, (1121), 1085 states have call successors, (1121) [2021-11-19 04:52:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6591 states to 6591 states and 8876 transitions. [2021-11-19 04:52:56,477 INFO L78 Accepts]: Start accepts. Automaton has 6591 states and 8876 transitions. Word has length 197 [2021-11-19 04:52:56,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:56,478 INFO L470 AbstractCegarLoop]: Abstraction has 6591 states and 8876 transitions. [2021-11-19 04:52:56,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 04:52:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 6591 states and 8876 transitions. [2021-11-19 04:52:56,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 04:52:56,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:56,493 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:56,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 04:52:56,493 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:56,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:56,494 INFO L85 PathProgramCache]: Analyzing trace with hash 18679536, now seen corresponding path program 1 times [2021-11-19 04:52:56,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:56,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763385986] [2021-11-19 04:52:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:56,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:52:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:52:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:52:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 04:52:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:52:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-19 04:52:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:52:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:52:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-19 04:52:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-19 04:52:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-19 04:52:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-19 04:52:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-19 04:52:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-19 04:52:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 04:52:56,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:56,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763385986] [2021-11-19 04:52:56,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763385986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:56,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:56,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:52:56,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921141462] [2021-11-19 04:52:56,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:56,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:52:56,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:56,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:52:56,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:56,858 INFO L87 Difference]: Start difference. First operand 6591 states and 8876 transitions. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-19 04:52:58,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:58,908 INFO L93 Difference]: Finished difference Result 14906 states and 21265 transitions. [2021-11-19 04:52:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:52:58,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 195 [2021-11-19 04:52:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:58,968 INFO L225 Difference]: With dead ends: 14906 [2021-11-19 04:52:58,968 INFO L226 Difference]: Without dead ends: 13298 [2021-11-19 04:52:58,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:58,980 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 661 mSDsluCounter, 2928 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 3826 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:58,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 3826 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:52:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13298 states. [2021-11-19 04:52:59,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13298 to 6621. [2021-11-19 04:52:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6621 states, 5108 states have (on average 1.3112764291307752) internal successors, (6698), 5152 states have internal predecessors, (6698), 1087 states have call successors, (1087), 412 states have call predecessors, (1087), 425 states have return successors, (1121), 1056 states have call predecessors, (1121), 1085 states have call successors, (1121) [2021-11-19 04:52:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6621 states to 6621 states and 8906 transitions. [2021-11-19 04:52:59,682 INFO L78 Accepts]: Start accepts. Automaton has 6621 states and 8906 transitions. Word has length 195 [2021-11-19 04:52:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:59,683 INFO L470 AbstractCegarLoop]: Abstraction has 6621 states and 8906 transitions. [2021-11-19 04:52:59,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (23), 6 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-19 04:52:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 6621 states and 8906 transitions. [2021-11-19 04:52:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-19 04:52:59,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:59,700 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:59,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 04:52:59,700 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:59,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1500364211, now seen corresponding path program 1 times [2021-11-19 04:52:59,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:59,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386806763] [2021-11-19 04:52:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:59,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:59,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:59,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:52:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:59,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:59,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:52:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:59,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:59,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:59,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:52:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:59,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:52:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:59,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:59,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:52:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:59,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-19 04:52:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:59,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-19 04:52:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:00,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:00,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:53:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:00,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-11-19 04:53:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:00,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:00,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-19 04:53:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:00,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-19 04:53:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:00,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-19 04:53:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:00,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-19 04:53:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:00,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-11-19 04:53:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:00,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-19 04:53:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 04:53:00,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:00,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386806763] [2021-11-19 04:53:00,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386806763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:00,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435166915] [2021-11-19 04:53:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:00,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:00,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:00,072 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:00,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:53:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-19 04:53:00,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-19 04:53:02,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:53:02,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435166915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:53:02,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:53:02,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2021-11-19 04:53:02,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499500252] [2021-11-19 04:53:02,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:53:02,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:53:02,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:02,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:53:02,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:53:02,097 INFO L87 Difference]: Start difference. First operand 6621 states and 8906 transitions. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-19 04:53:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:04,361 INFO L93 Difference]: Finished difference Result 17290 states and 23893 transitions. [2021-11-19 04:53:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:53:04,362 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 198 [2021-11-19 04:53:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:04,391 INFO L225 Difference]: With dead ends: 17290 [2021-11-19 04:53:04,391 INFO L226 Difference]: Without dead ends: 11962 [2021-11-19 04:53:04,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:53:04,408 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 954 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:04,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 3171 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:53:04,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11962 states. [2021-11-19 04:53:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11962 to 8221. [2021-11-19 04:53:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8221 states, 6411 states have (on average 1.3153954141319606) internal successors, (8433), 6481 states have internal predecessors, (8433), 1275 states have call successors, (1275), 521 states have call predecessors, (1275), 534 states have return successors, (1325), 1218 states have call predecessors, (1325), 1273 states have call successors, (1325) [2021-11-19 04:53:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8221 states to 8221 states and 11033 transitions. [2021-11-19 04:53:05,154 INFO L78 Accepts]: Start accepts. Automaton has 8221 states and 11033 transitions. Word has length 198 [2021-11-19 04:53:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:05,155 INFO L470 AbstractCegarLoop]: Abstraction has 8221 states and 11033 transitions. [2021-11-19 04:53:05,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-19 04:53:05,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8221 states and 11033 transitions. [2021-11-19 04:53:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-19 04:53:05,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:05,171 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:05,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:53:05,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:05,400 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:05,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:05,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1738944107, now seen corresponding path program 1 times [2021-11-19 04:53:05,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:05,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867888990] [2021-11-19 04:53:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:05,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:53:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:53:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:53:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:53:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:53:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:53:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:53:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:53:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 04:53:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:53:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-19 04:53:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:53:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:53:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-19 04:53:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-19 04:53:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-19 04:53:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-19 04:53:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-19 04:53:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-19 04:53:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-11-19 04:53:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 04:53:05,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:05,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867888990] [2021-11-19 04:53:05,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867888990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:53:05,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:53:05,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:53:05,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868504685] [2021-11-19 04:53:05,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:53:05,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:53:05,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:05,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:53:05,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:53:05,748 INFO L87 Difference]: Start difference. First operand 8221 states and 11033 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 04:53:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:08,522 INFO L93 Difference]: Finished difference Result 10569 states and 14249 transitions. [2021-11-19 04:53:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:53:08,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 201 [2021-11-19 04:53:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:08,548 INFO L225 Difference]: With dead ends: 10569 [2021-11-19 04:53:08,548 INFO L226 Difference]: Without dead ends: 10566 [2021-11-19 04:53:08,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:53:08,555 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 1209 mSDsluCounter, 2049 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 968 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 2948 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 968 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:08,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1305 Valid, 2948 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [968 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 04:53:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10566 states. [2021-11-19 04:53:09,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10566 to 10245. [2021-11-19 04:53:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10245 states, 7972 states have (on average 1.3153537380832916) internal successors, (10486), 8057 states have internal predecessors, (10486), 1606 states have call successors, (1606), 648 states have call predecessors, (1606), 666 states have return successors, (1670), 1539 states have call predecessors, (1670), 1604 states have call successors, (1670) [2021-11-19 04:53:09,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10245 states to 10245 states and 13762 transitions. [2021-11-19 04:53:09,329 INFO L78 Accepts]: Start accepts. Automaton has 10245 states and 13762 transitions. Word has length 201 [2021-11-19 04:53:09,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:09,329 INFO L470 AbstractCegarLoop]: Abstraction has 10245 states and 13762 transitions. [2021-11-19 04:53:09,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 04:53:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 10245 states and 13762 transitions. [2021-11-19 04:53:09,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-19 04:53:09,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:09,341 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:09,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 04:53:09,342 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1257863849, now seen corresponding path program 1 times [2021-11-19 04:53:09,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:09,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648607390] [2021-11-19 04:53:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:09,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:53:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:53:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:53:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:53:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:53:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:53:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:53:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:53:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 04:53:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:53:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-19 04:53:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:53:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:53:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-19 04:53:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-19 04:53:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-19 04:53:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-19 04:53:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-19 04:53:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-19 04:53:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-11-19 04:53:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 04:53:09,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:09,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648607390] [2021-11-19 04:53:09,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648607390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:53:09,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:53:09,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:53:09,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216108264] [2021-11-19 04:53:09,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:53:09,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:53:09,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:09,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:53:09,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:53:09,666 INFO L87 Difference]: Start difference. First operand 10245 states and 13762 transitions. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 7 states have internal predecessors, (125), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 04:53:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:12,819 INFO L93 Difference]: Finished difference Result 30635 states and 43564 transitions. [2021-11-19 04:53:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:53:12,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 7 states have internal predecessors, (125), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 201 [2021-11-19 04:53:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:12,876 INFO L225 Difference]: With dead ends: 30635 [2021-11-19 04:53:12,876 INFO L226 Difference]: Without dead ends: 22302 [2021-11-19 04:53:12,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:53:12,897 INFO L933 BasicCegarLoop]: 1048 mSDtfsCounter, 1569 mSDsluCounter, 5598 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1657 SdHoareTripleChecker+Valid, 6646 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:12,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1657 Valid, 6646 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 04:53:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22302 states. [2021-11-19 04:53:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22302 to 9402. [2021-11-19 04:53:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9402 states, 7347 states have (on average 1.3106029671974955) internal successors, (9629), 7431 states have internal predecessors, (9629), 1431 states have call successors, (1431), 606 states have call predecessors, (1431), 623 states have return successors, (1494), 1364 states have call predecessors, (1494), 1429 states have call successors, (1494) [2021-11-19 04:53:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9402 states to 9402 states and 12554 transitions. [2021-11-19 04:53:13,787 INFO L78 Accepts]: Start accepts. Automaton has 9402 states and 12554 transitions. Word has length 201 [2021-11-19 04:53:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:13,788 INFO L470 AbstractCegarLoop]: Abstraction has 9402 states and 12554 transitions. [2021-11-19 04:53:13,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 7 states have internal predecessors, (125), 2 states have call successors, (24), 6 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 04:53:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 9402 states and 12554 transitions. [2021-11-19 04:53:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-19 04:53:13,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:13,803 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:13,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 04:53:13,803 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:13,804 INFO L85 PathProgramCache]: Analyzing trace with hash -837594746, now seen corresponding path program 1 times [2021-11-19 04:53:13,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:13,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398721730] [2021-11-19 04:53:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:13,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:13,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:53:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:13,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:53:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:13,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:53:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:13,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:53:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:13,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:53:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:13,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:53:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:53:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:53:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 04:53:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:53:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-19 04:53:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:53:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:53:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-19 04:53:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-19 04:53:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-19 04:53:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:53:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:53:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:53:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:53:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:53:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-19 04:53:14,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:14,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398721730] [2021-11-19 04:53:14,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398721730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:14,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786451560] [2021-11-19 04:53:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:14,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:14,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:14,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:14,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:53:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:14,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 1814 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 04:53:14,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-19 04:53:15,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:53:15,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786451560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:53:15,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:53:15,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-11-19 04:53:15,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251230673] [2021-11-19 04:53:15,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:53:15,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:53:15,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:15,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:53:15,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:53:15,155 INFO L87 Difference]: Start difference. First operand 9402 states and 12554 transitions. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 3 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 04:53:17,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:17,569 INFO L93 Difference]: Finished difference Result 26815 states and 37000 transitions. [2021-11-19 04:53:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:53:17,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 3 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 223 [2021-11-19 04:53:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:17,623 INFO L225 Difference]: With dead ends: 26815 [2021-11-19 04:53:17,623 INFO L226 Difference]: Without dead ends: 22711 [2021-11-19 04:53:17,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:53:17,639 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 3152 mSDsluCounter, 4059 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3171 SdHoareTripleChecker+Valid, 4987 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:17,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3171 Valid, 4987 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:53:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22711 states. [2021-11-19 04:53:18,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22711 to 10652. [2021-11-19 04:53:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10652 states, 8370 states have (on average 1.3132616487455198) internal successors, (10992), 8487 states have internal predecessors, (10992), 1577 states have call successors, (1577), 680 states have call predecessors, (1577), 704 states have return successors, (1661), 1484 states have call predecessors, (1661), 1575 states have call successors, (1661) [2021-11-19 04:53:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10652 states to 10652 states and 14230 transitions. [2021-11-19 04:53:18,586 INFO L78 Accepts]: Start accepts. Automaton has 10652 states and 14230 transitions. Word has length 223 [2021-11-19 04:53:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:18,586 INFO L470 AbstractCegarLoop]: Abstraction has 10652 states and 14230 transitions. [2021-11-19 04:53:18,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 3 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 04:53:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 10652 states and 14230 transitions. [2021-11-19 04:53:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-19 04:53:18,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:18,601 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:18,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:53:18,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-19 04:53:18,804 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1451882372, now seen corresponding path program 1 times [2021-11-19 04:53:18,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:18,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653285131] [2021-11-19 04:53:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:18,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:18,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:18,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:53:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:53:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:53:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:53:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:53:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:53:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:53:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:53:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 04:53:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:53:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-19 04:53:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:53:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:53:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-19 04:53:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-19 04:53:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-19 04:53:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-19 04:53:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-19 04:53:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-19 04:53:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-11-19 04:53:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-11-19 04:53:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:53:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:53:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:53:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:53:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:53:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 04:53:19,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:19,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653285131] [2021-11-19 04:53:19,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653285131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:19,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180181611] [2021-11-19 04:53:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:19,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:19,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:19,251 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:19,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:53:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:19,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 04:53:19,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-19 04:53:20,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:53:20,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180181611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:53:20,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:53:20,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2021-11-19 04:53:20,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361557823] [2021-11-19 04:53:20,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:53:20,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:53:20,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:20,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:53:20,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:53:20,672 INFO L87 Difference]: Start difference. First operand 10652 states and 14230 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 3 states have internal predecessors, (162), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 04:53:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:21,753 INFO L93 Difference]: Finished difference Result 14875 states and 19906 transitions. [2021-11-19 04:53:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:53:21,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 3 states have internal predecessors, (162), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 259 [2021-11-19 04:53:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:21,775 INFO L225 Difference]: With dead ends: 14875 [2021-11-19 04:53:21,775 INFO L226 Difference]: Without dead ends: 10758 [2021-11-19 04:53:21,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:53:21,784 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 588 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:21,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 874 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:53:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10758 states. [2021-11-19 04:53:22,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10758 to 10636. [2021-11-19 04:53:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10636 states, 8362 states have (on average 1.3126046400382683) internal successors, (10976), 8479 states have internal predecessors, (10976), 1569 states have call successors, (1569), 680 states have call predecessors, (1569), 704 states have return successors, (1653), 1476 states have call predecessors, (1653), 1567 states have call successors, (1653) [2021-11-19 04:53:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10636 states to 10636 states and 14198 transitions. [2021-11-19 04:53:22,586 INFO L78 Accepts]: Start accepts. Automaton has 10636 states and 14198 transitions. Word has length 259 [2021-11-19 04:53:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:22,586 INFO L470 AbstractCegarLoop]: Abstraction has 10636 states and 14198 transitions. [2021-11-19 04:53:22,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 3 states have internal predecessors, (162), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 04:53:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 10636 states and 14198 transitions. [2021-11-19 04:53:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-19 04:53:22,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:22,603 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:22,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-19 04:53:22,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:22,804 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash -699038396, now seen corresponding path program 1 times [2021-11-19 04:53:22,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:22,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071822215] [2021-11-19 04:53:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:22,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:22,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:22,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:53:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:22,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:53:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:22,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:53:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:53:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:53:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:53:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:53:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:53:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 04:53:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:53:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-19 04:53:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:53:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:53:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-19 04:53:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-19 04:53:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-19 04:53:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-19 04:53:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-19 04:53:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-19 04:53:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-11-19 04:53:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-11-19 04:53:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:53:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:53:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:53:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:53:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:53:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 04:53:23,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:23,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071822215] [2021-11-19 04:53:23,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071822215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:23,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609562335] [2021-11-19 04:53:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:23,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:23,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:23,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:23,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:53:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-19 04:53:23,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 04:53:25,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:53:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-19 04:53:26,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609562335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:53:26,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:53:26,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 16] total 38 [2021-11-19 04:53:26,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397586253] [2021-11-19 04:53:26,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:53:26,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-19 04:53:26,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:26,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-19 04:53:26,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:53:26,775 INFO L87 Difference]: Start difference. First operand 10636 states and 14198 transitions. Second operand has 38 states, 38 states have (on average 9.68421052631579) internal successors, (368), 26 states have internal predecessors, (368), 8 states have call successors, (85), 9 states have call predecessors, (85), 13 states have return successors, (77), 13 states have call predecessors, (77), 8 states have call successors, (77) [2021-11-19 04:53:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:51,625 INFO L93 Difference]: Finished difference Result 64163 states and 93315 transitions. [2021-11-19 04:53:51,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-19 04:53:51,625 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 9.68421052631579) internal successors, (368), 26 states have internal predecessors, (368), 8 states have call successors, (85), 9 states have call predecessors, (85), 13 states have return successors, (77), 13 states have call predecessors, (77), 8 states have call successors, (77) Word has length 259 [2021-11-19 04:53:51,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:51,863 INFO L225 Difference]: With dead ends: 64163 [2021-11-19 04:53:51,864 INFO L226 Difference]: Without dead ends: 53167 [2021-11-19 04:53:51,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 575 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1156, Invalid=11954, Unknown=0, NotChecked=0, Total=13110 [2021-11-19 04:53:51,919 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 3468 mSDsluCounter, 19146 mSDsCounter, 0 mSdLazyCounter, 19385 mSolverCounterSat, 2805 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3630 SdHoareTripleChecker+Valid, 20105 SdHoareTripleChecker+Invalid, 22190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2805 IncrementalHoareTripleChecker+Valid, 19385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:51,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3630 Valid, 20105 Invalid, 22190 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2805 Valid, 19385 Invalid, 0 Unknown, 0 Unchecked, 17.6s Time] [2021-11-19 04:53:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53167 states. [2021-11-19 04:53:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53167 to 11232. [2021-11-19 04:53:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 8751 states have (on average 1.3006513541309566) internal successors, (11382), 8870 states have internal predecessors, (11382), 1679 states have call successors, (1679), 703 states have call predecessors, (1679), 801 states have return successors, (1842), 1658 states have call predecessors, (1842), 1677 states have call successors, (1842) [2021-11-19 04:53:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 14903 transitions. [2021-11-19 04:53:53,583 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 14903 transitions. Word has length 259 [2021-11-19 04:53:53,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:53,584 INFO L470 AbstractCegarLoop]: Abstraction has 11232 states and 14903 transitions. [2021-11-19 04:53:53,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.68421052631579) internal successors, (368), 26 states have internal predecessors, (368), 8 states have call successors, (85), 9 states have call predecessors, (85), 13 states have return successors, (77), 13 states have call predecessors, (77), 8 states have call successors, (77) [2021-11-19 04:53:53,584 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 14903 transitions. [2021-11-19 04:53:53,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-19 04:53:53,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:53,612 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:53,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:53:53,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:53,840 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2127937476, now seen corresponding path program 1 times [2021-11-19 04:53:53,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:53,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225786640] [2021-11-19 04:53:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:53,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:53,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:53,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:53:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:53,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:53:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:53:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:53:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:53:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:53:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 04:53:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-19 04:53:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-19 04:53:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-19 04:53:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-19 04:53:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-19 04:53:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-19 04:53:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-19 04:53:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-19 04:53:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-11-19 04:53:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-19 04:53:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-11-19 04:53:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-11-19 04:53:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-11-19 04:53:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2021-11-19 04:53:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:53:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:53:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:53:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:53:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:53:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-19 04:53:54,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:54,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225786640] [2021-11-19 04:53:54,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225786640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:53:54,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:53:54,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:53:54,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153577504] [2021-11-19 04:53:54,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:53:54,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:53:54,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:54,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:53:54,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:53:54,208 INFO L87 Difference]: Start difference. First operand 11232 states and 14903 transitions. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (31), 7 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 04:53:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:56,363 INFO L93 Difference]: Finished difference Result 22600 states and 30012 transitions. [2021-11-19 04:53:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:53:56,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (31), 7 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 271 [2021-11-19 04:53:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:56,394 INFO L225 Difference]: With dead ends: 22600 [2021-11-19 04:53:56,395 INFO L226 Difference]: Without dead ends: 11389 [2021-11-19 04:53:56,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:53:56,415 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 198 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:56,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 1607 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:53:56,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11389 states. [2021-11-19 04:53:57,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11389 to 11233. [2021-11-19 04:53:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11233 states, 8752 states have (on average 1.3006170018281535) internal successors, (11383), 8871 states have internal predecessors, (11383), 1679 states have call successors, (1679), 703 states have call predecessors, (1679), 801 states have return successors, (1842), 1658 states have call predecessors, (1842), 1677 states have call successors, (1842) [2021-11-19 04:53:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11233 states to 11233 states and 14904 transitions. [2021-11-19 04:53:57,524 INFO L78 Accepts]: Start accepts. Automaton has 11233 states and 14904 transitions. Word has length 271 [2021-11-19 04:53:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:57,524 INFO L470 AbstractCegarLoop]: Abstraction has 11233 states and 14904 transitions. [2021-11-19 04:53:57,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (31), 7 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 04:53:57,524 INFO L276 IsEmpty]: Start isEmpty. Operand 11233 states and 14904 transitions. [2021-11-19 04:53:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-19 04:53:57,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:57,548 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:57,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 04:53:57,548 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:57,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1084248439, now seen corresponding path program 1 times [2021-11-19 04:53:57,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:57,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506953592] [2021-11-19 04:53:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:57,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:53:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:53:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:53:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 04:53:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:53:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:53:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:53:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-19 04:53:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-19 04:53:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-19 04:53:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-19 04:53:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 04:53:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-19 04:53:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-19 04:53:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-19 04:53:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-11-19 04:53:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-11-19 04:53:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-11-19 04:53:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-11-19 04:53:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-11-19 04:53:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-11-19 04:53:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:53:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:53:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:53:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:53:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:53:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:53:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-19 04:53:57,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:57,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506953592] [2021-11-19 04:53:57,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506953592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:57,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632558154] [2021-11-19 04:53:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:57,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:57,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:57,956 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:57,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:53:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:58,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 04:53:58,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-19 04:53:59,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:53:59,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632558154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:53:59,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:53:59,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-11-19 04:53:59,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68572883] [2021-11-19 04:53:59,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:53:59,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:53:59,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:59,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:53:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:53:59,698 INFO L87 Difference]: Start difference. First operand 11233 states and 14904 transitions. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 5 states have internal predecessors, (162), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 04:54:01,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:01,204 INFO L93 Difference]: Finished difference Result 15674 states and 20850 transitions. [2021-11-19 04:54:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:54:01,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 5 states have internal predecessors, (162), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) Word has length 272 [2021-11-19 04:54:01,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:01,228 INFO L225 Difference]: With dead ends: 15674 [2021-11-19 04:54:01,228 INFO L226 Difference]: Without dead ends: 11363 [2021-11-19 04:54:01,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:54:01,238 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 460 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:01,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 1827 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:54:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11363 states. [2021-11-19 04:54:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11363 to 11241. [2021-11-19 04:54:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11241 states, 8760 states have (on average 1.3003424657534246) internal successors, (11391), 8879 states have internal predecessors, (11391), 1679 states have call successors, (1679), 703 states have call predecessors, (1679), 801 states have return successors, (1842), 1658 states have call predecessors, (1842), 1677 states have call successors, (1842) [2021-11-19 04:54:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11241 states to 11241 states and 14912 transitions. [2021-11-19 04:54:02,460 INFO L78 Accepts]: Start accepts. Automaton has 11241 states and 14912 transitions. Word has length 272 [2021-11-19 04:54:02,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:02,461 INFO L470 AbstractCegarLoop]: Abstraction has 11241 states and 14912 transitions. [2021-11-19 04:54:02,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 5 states have internal predecessors, (162), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 04:54:02,462 INFO L276 IsEmpty]: Start isEmpty. Operand 11241 states and 14912 transitions. [2021-11-19 04:54:02,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-19 04:54:02,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:02,479 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:02,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:02,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-19 04:54:02,680 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:02,680 INFO L85 PathProgramCache]: Analyzing trace with hash 644166751, now seen corresponding path program 1 times [2021-11-19 04:54:02,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:02,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529882555] [2021-11-19 04:54:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:02,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:54:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:54:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:54:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 04:54:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:54:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:54:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:54:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-19 04:54:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-19 04:54:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-19 04:54:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-19 04:54:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 04:54:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-19 04:54:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-19 04:54:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-19 04:54:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-19 04:54:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-11-19 04:54:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-11-19 04:54:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-19 04:54:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-11-19 04:54:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-19 04:54:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:54:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:54:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:54:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:54:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:54:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-19 04:54:03,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:03,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529882555] [2021-11-19 04:54:03,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529882555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:03,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625014770] [2021-11-19 04:54:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:03,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:03,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:03,136 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:03,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:54:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2143 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:54:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-19 04:54:04,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-19 04:54:04,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625014770] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:04,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:54:04,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 5] total 13 [2021-11-19 04:54:04,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406291914] [2021-11-19 04:54:04,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:04,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:54:04,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:04,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:54:04,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:54:04,984 INFO L87 Difference]: Start difference. First operand 11241 states and 14912 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 04:54:06,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:06,073 INFO L93 Difference]: Finished difference Result 15544 states and 20660 transitions. [2021-11-19 04:54:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:54:06,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 273 [2021-11-19 04:54:06,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:06,095 INFO L225 Difference]: With dead ends: 15544 [2021-11-19 04:54:06,095 INFO L226 Difference]: Without dead ends: 11249 [2021-11-19 04:54:06,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:54:06,103 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 4 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:06,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1387 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:06,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11249 states. [2021-11-19 04:54:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11249 to 11249. [2021-11-19 04:54:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11249 states, 8768 states have (on average 1.3000684306569343) internal successors, (11399), 8887 states have internal predecessors, (11399), 1679 states have call successors, (1679), 703 states have call predecessors, (1679), 801 states have return successors, (1842), 1658 states have call predecessors, (1842), 1677 states have call successors, (1842) [2021-11-19 04:54:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11249 states to 11249 states and 14920 transitions. [2021-11-19 04:54:07,149 INFO L78 Accepts]: Start accepts. Automaton has 11249 states and 14920 transitions. Word has length 273 [2021-11-19 04:54:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:07,150 INFO L470 AbstractCegarLoop]: Abstraction has 11249 states and 14920 transitions. [2021-11-19 04:54:07,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 04:54:07,150 INFO L276 IsEmpty]: Start isEmpty. Operand 11249 states and 14920 transitions. [2021-11-19 04:54:07,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-19 04:54:07,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:07,170 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:07,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-19 04:54:07,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-19 04:54:07,371 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:07,372 INFO L85 PathProgramCache]: Analyzing trace with hash 878313927, now seen corresponding path program 1 times [2021-11-19 04:54:07,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:07,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313441035] [2021-11-19 04:54:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:07,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:54:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:54:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:54:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 04:54:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:54:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:54:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:54:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-19 04:54:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-19 04:54:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-19 04:54:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-19 04:54:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 04:54:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-19 04:54:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-19 04:54:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-19 04:54:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-11-19 04:54:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-19 04:54:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-11-19 04:54:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-11-19 04:54:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-11-19 04:54:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2021-11-19 04:54:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:54:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:54:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:54:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:54:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:54:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-19 04:54:07,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:07,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313441035] [2021-11-19 04:54:07,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313441035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:07,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922817783] [2021-11-19 04:54:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:07,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:07,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:07,836 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:07,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:54:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 2153 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 04:54:08,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-19 04:54:09,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-19 04:54:09,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922817783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:09,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:09,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2021-11-19 04:54:09,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387852186] [2021-11-19 04:54:09,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:09,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:54:09,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:09,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:54:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:54:09,762 INFO L87 Difference]: Start difference. First operand 11249 states and 14920 transitions. Second operand has 17 states, 17 states have (on average 14.941176470588236) internal successors, (254), 12 states have internal predecessors, (254), 4 states have call successors, (63), 7 states have call predecessors, (63), 3 states have return successors, (56), 2 states have call predecessors, (56), 4 states have call successors, (56) [2021-11-19 04:54:12,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:12,380 INFO L93 Difference]: Finished difference Result 22763 states and 30227 transitions. [2021-11-19 04:54:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:54:12,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 14.941176470588236) internal successors, (254), 12 states have internal predecessors, (254), 4 states have call successors, (63), 7 states have call predecessors, (63), 3 states have return successors, (56), 2 states have call predecessors, (56), 4 states have call successors, (56) Word has length 274 [2021-11-19 04:54:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:12,407 INFO L225 Difference]: With dead ends: 22763 [2021-11-19 04:54:12,407 INFO L226 Difference]: Without dead ends: 11504 [2021-11-19 04:54:12,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:54:12,427 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 447 mSDsluCounter, 5587 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 6256 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:12,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 6256 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 04:54:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11504 states. [2021-11-19 04:54:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11504 to 11258. [2021-11-19 04:54:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11258 states, 8777 states have (on average 1.2997607382932665) internal successors, (11408), 8896 states have internal predecessors, (11408), 1679 states have call successors, (1679), 703 states have call predecessors, (1679), 801 states have return successors, (1842), 1658 states have call predecessors, (1842), 1677 states have call successors, (1842) [2021-11-19 04:54:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11258 states to 11258 states and 14929 transitions. [2021-11-19 04:54:13,486 INFO L78 Accepts]: Start accepts. Automaton has 11258 states and 14929 transitions. Word has length 274 [2021-11-19 04:54:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:13,487 INFO L470 AbstractCegarLoop]: Abstraction has 11258 states and 14929 transitions. [2021-11-19 04:54:13,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.941176470588236) internal successors, (254), 12 states have internal predecessors, (254), 4 states have call successors, (63), 7 states have call predecessors, (63), 3 states have return successors, (56), 2 states have call predecessors, (56), 4 states have call successors, (56) [2021-11-19 04:54:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 11258 states and 14929 transitions. [2021-11-19 04:54:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-19 04:54:13,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:13,510 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:13,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:13,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-19 04:54:13,724 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:13,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash -388993438, now seen corresponding path program 2 times [2021-11-19 04:54:13,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:13,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020351699] [2021-11-19 04:54:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:13,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:54:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:54:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 04:54:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 04:54:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:54:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 04:54:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-19 04:54:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-19 04:54:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:54:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-11-19 04:54:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-19 04:54:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-19 04:54:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-11-19 04:54:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-19 04:54:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-19 04:54:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-19 04:54:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-19 04:54:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-11-19 04:54:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-11-19 04:54:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-11-19 04:54:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-11-19 04:54:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:54:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:54:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:54:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:54:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:54:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-19 04:54:14,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:14,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020351699] [2021-11-19 04:54:14,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020351699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:14,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82517655] [2021-11-19 04:54:14,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:54:14,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:14,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:14,320 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:14,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:54:14,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:54:14,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:15,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 2191 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:54:15,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-19 04:54:15,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-19 04:54:16,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82517655] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:16,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:16,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2021-11-19 04:54:16,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436041480] [2021-11-19 04:54:16,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:16,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 04:54:16,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:16,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 04:54:16,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:54:16,415 INFO L87 Difference]: Start difference. First operand 11258 states and 14929 transitions. Second operand has 19 states, 19 states have (on average 13.421052631578947) internal successors, (255), 14 states have internal predecessors, (255), 4 states have call successors, (63), 7 states have call predecessors, (63), 3 states have return successors, (56), 2 states have call predecessors, (56), 4 states have call successors, (56) [2021-11-19 04:54:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:19,723 INFO L93 Difference]: Finished difference Result 22780 states and 30244 transitions. [2021-11-19 04:54:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:54:19,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 13.421052631578947) internal successors, (255), 14 states have internal predecessors, (255), 4 states have call successors, (63), 7 states have call predecessors, (63), 3 states have return successors, (56), 2 states have call predecessors, (56), 4 states have call successors, (56) Word has length 276 [2021-11-19 04:54:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:19,747 INFO L225 Difference]: With dead ends: 22780 [2021-11-19 04:54:19,747 INFO L226 Difference]: Without dead ends: 11513 [2021-11-19 04:54:19,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-11-19 04:54:19,763 INFO L933 BasicCegarLoop]: 666 mSDtfsCounter, 454 mSDsluCounter, 5934 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 6600 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:19,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 6600 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 04:54:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11513 states. [2021-11-19 04:54:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11513 to 11267. [2021-11-19 04:54:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11267 states, 8786 states have (on average 1.2994536763032096) internal successors, (11417), 8905 states have internal predecessors, (11417), 1679 states have call successors, (1679), 703 states have call predecessors, (1679), 801 states have return successors, (1842), 1658 states have call predecessors, (1842), 1677 states have call successors, (1842) [2021-11-19 04:54:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11267 states to 11267 states and 14938 transitions. [2021-11-19 04:54:21,000 INFO L78 Accepts]: Start accepts. Automaton has 11267 states and 14938 transitions. Word has length 276 [2021-11-19 04:54:21,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:21,001 INFO L470 AbstractCegarLoop]: Abstraction has 11267 states and 14938 transitions. [2021-11-19 04:54:21,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.421052631578947) internal successors, (255), 14 states have internal predecessors, (255), 4 states have call successors, (63), 7 states have call predecessors, (63), 3 states have return successors, (56), 2 states have call predecessors, (56), 4 states have call successors, (56) [2021-11-19 04:54:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 11267 states and 14938 transitions. [2021-11-19 04:54:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-19 04:54:21,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:21,017 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:21,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:21,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-19 04:54:21,218 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2139645977, now seen corresponding path program 3 times [2021-11-19 04:54:21,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:21,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99953244] [2021-11-19 04:54:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:21,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:54:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:54:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:54:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:54:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:54:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 04:54:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-19 04:54:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-19 04:54:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-19 04:54:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:54:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-19 04:54:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-19 04:54:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-19 04:54:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-19 04:54:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-11-19 04:54:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-11-19 04:54:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-11-19 04:54:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-19 04:54:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-11-19 04:54:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-11-19 04:54:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-11-19 04:54:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:54:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:54:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:54:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:54:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:54:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-19 04:54:21,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:21,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99953244] [2021-11-19 04:54:21,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99953244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:21,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952628644] [2021-11-19 04:54:21,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:54:21,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:21,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:21,763 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:21,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:54:23,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 04:54:23,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:23,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 2141 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:54:23,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-19 04:54:24,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-19 04:54:24,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952628644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:24,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:24,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 18 [2021-11-19 04:54:24,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559983490] [2021-11-19 04:54:24,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:24,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:54:24,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:24,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:54:24,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:54:24,792 INFO L87 Difference]: Start difference. First operand 11267 states and 14938 transitions. Second operand has 18 states, 18 states have (on average 14.055555555555555) internal successors, (253), 13 states have internal predecessors, (253), 4 states have call successors, (63), 7 states have call predecessors, (63), 3 states have return successors, (56), 2 states have call predecessors, (56), 4 states have call successors, (56) [2021-11-19 04:54:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:27,734 INFO L93 Difference]: Finished difference Result 22781 states and 30237 transitions. [2021-11-19 04:54:27,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:54:27,735 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 14.055555555555555) internal successors, (253), 13 states have internal predecessors, (253), 4 states have call successors, (63), 7 states have call predecessors, (63), 3 states have return successors, (56), 2 states have call predecessors, (56), 4 states have call successors, (56) Word has length 278 [2021-11-19 04:54:27,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:27,761 INFO L225 Difference]: With dead ends: 22781 [2021-11-19 04:54:27,761 INFO L226 Difference]: Without dead ends: 11522 [2021-11-19 04:54:27,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:54:27,780 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 438 mSDsluCounter, 5948 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 6617 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:27,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 6617 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 04:54:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11522 states. [2021-11-19 04:54:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11522 to 11276. [2021-11-19 04:54:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11276 states, 8795 states have (on average 1.2991472427515633) internal successors, (11426), 8914 states have internal predecessors, (11426), 1679 states have call successors, (1679), 703 states have call predecessors, (1679), 801 states have return successors, (1842), 1658 states have call predecessors, (1842), 1677 states have call successors, (1842) [2021-11-19 04:54:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11276 states to 11276 states and 14947 transitions. [2021-11-19 04:54:28,868 INFO L78 Accepts]: Start accepts. Automaton has 11276 states and 14947 transitions. Word has length 278 [2021-11-19 04:54:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:28,868 INFO L470 AbstractCegarLoop]: Abstraction has 11276 states and 14947 transitions. [2021-11-19 04:54:28,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.055555555555555) internal successors, (253), 13 states have internal predecessors, (253), 4 states have call successors, (63), 7 states have call predecessors, (63), 3 states have return successors, (56), 2 states have call predecessors, (56), 4 states have call successors, (56) [2021-11-19 04:54:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 11276 states and 14947 transitions. [2021-11-19 04:54:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-19 04:54:28,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:28,885 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:28,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:29,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:29,086 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2079942916, now seen corresponding path program 4 times [2021-11-19 04:54:29,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:29,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059820590] [2021-11-19 04:54:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:29,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:54:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:54:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-19 04:54:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:54:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:54:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-19 04:54:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-19 04:54:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-19 04:54:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-19 04:54:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-19 04:54:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 04:54:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-19 04:54:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-19 04:54:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-19 04:54:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-19 04:54:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-11-19 04:54:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-11-19 04:54:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-11-19 04:54:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-11-19 04:54:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2021-11-19 04:54:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2021-11-19 04:54:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:54:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:54:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:54:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:54:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:54:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 04:54:29,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:29,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059820590] [2021-11-19 04:54:29,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059820590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:29,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825867382] [2021-11-19 04:54:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:54:29,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:29,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:29,941 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:29,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:54:30,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:54:30,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:30,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 2245 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 04:54:30,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-19 04:54:31,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-19 04:54:32,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825867382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:32,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:32,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 8] total 26 [2021-11-19 04:54:32,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163211681] [2021-11-19 04:54:32,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:32,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 04:54:32,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:32,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 04:54:32,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:54:32,482 INFO L87 Difference]: Start difference. First operand 11276 states and 14947 transitions. Second operand has 26 states, 26 states have (on average 7.769230769230769) internal successors, (202), 21 states have internal predecessors, (202), 4 states have call successors, (58), 7 states have call predecessors, (58), 3 states have return successors, (44), 2 states have call predecessors, (44), 4 states have call successors, (44) [2021-11-19 04:54:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:37,317 INFO L93 Difference]: Finished difference Result 22798 states and 30262 transitions. [2021-11-19 04:54:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 04:54:37,318 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.769230769230769) internal successors, (202), 21 states have internal predecessors, (202), 4 states have call successors, (58), 7 states have call predecessors, (58), 3 states have return successors, (44), 2 states have call predecessors, (44), 4 states have call successors, (44) Word has length 280 [2021-11-19 04:54:37,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:37,346 INFO L225 Difference]: With dead ends: 22798 [2021-11-19 04:54:37,346 INFO L226 Difference]: Without dead ends: 11530 [2021-11-19 04:54:37,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 608 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:54:37,365 INFO L933 BasicCegarLoop]: 666 mSDtfsCounter, 909 mSDsluCounter, 8466 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 9132 SdHoareTripleChecker+Invalid, 2449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:37,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [953 Valid, 9132 Invalid, 2449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-19 04:54:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11530 states. [2021-11-19 04:54:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11530 to 11284. [2021-11-19 04:54:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11284 states, 8803 states have (on average 1.2987617857548563) internal successors, (11433), 8922 states have internal predecessors, (11433), 1679 states have call successors, (1679), 703 states have call predecessors, (1679), 801 states have return successors, (1842), 1658 states have call predecessors, (1842), 1677 states have call successors, (1842) [2021-11-19 04:54:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11284 states to 11284 states and 14954 transitions. [2021-11-19 04:54:38,520 INFO L78 Accepts]: Start accepts. Automaton has 11284 states and 14954 transitions. Word has length 280 [2021-11-19 04:54:38,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:38,520 INFO L470 AbstractCegarLoop]: Abstraction has 11284 states and 14954 transitions. [2021-11-19 04:54:38,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.769230769230769) internal successors, (202), 21 states have internal predecessors, (202), 4 states have call successors, (58), 7 states have call predecessors, (58), 3 states have return successors, (44), 2 states have call predecessors, (44), 4 states have call successors, (44) [2021-11-19 04:54:38,521 INFO L276 IsEmpty]: Start isEmpty. Operand 11284 states and 14954 transitions. [2021-11-19 04:54:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-19 04:54:38,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:38,537 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:38,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:38,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-19 04:54:38,740 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash -385421116, now seen corresponding path program 5 times [2021-11-19 04:54:38,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:38,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812976896] [2021-11-19 04:54:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:38,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:54:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:54:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-19 04:54:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:54:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:54:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-19 04:54:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-19 04:54:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-19 04:54:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-19 04:54:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-19 04:54:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 04:54:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-19 04:54:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-19 04:54:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-19 04:54:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-19 04:54:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-19 04:54:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-11-19 04:54:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-11-19 04:54:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-11-19 04:54:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-11-19 04:54:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-11-19 04:54:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:54:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:54:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:54:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:54:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:54:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 04:54:39,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:39,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812976896] [2021-11-19 04:54:39,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812976896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:39,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033931578] [2021-11-19 04:54:39,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:54:39,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:39,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:39,548 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:39,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 04:56:41,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 04:56:41,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:56:41,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:56:41,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:56:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 49 proven. 11 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-19 04:56:42,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:56:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 04:56:42,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033931578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:56:42,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:56:42,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 25 [2021-11-19 04:56:42,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704310617] [2021-11-19 04:56:42,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:56:42,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:56:42,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:42,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:56:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:56:42,973 INFO L87 Difference]: Start difference. First operand 11284 states and 14954 transitions. Second operand has 25 states, 25 states have (on average 7.96) internal successors, (199), 20 states have internal predecessors, (199), 3 states have call successors, (57), 7 states have call predecessors, (57), 2 states have return successors, (43), 2 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-19 04:56:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:48,469 INFO L93 Difference]: Finished difference Result 15985 states and 21241 transitions. [2021-11-19 04:56:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:56:48,470 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.96) internal successors, (199), 20 states have internal predecessors, (199), 3 states have call successors, (57), 7 states have call predecessors, (57), 2 states have return successors, (43), 2 states have call predecessors, (43), 3 states have call successors, (43) Word has length 281 [2021-11-19 04:56:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:48,496 INFO L225 Difference]: With dead ends: 15985 [2021-11-19 04:56:48,497 INFO L226 Difference]: Without dead ends: 11570 [2021-11-19 04:56:48,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 612 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=402, Invalid=1950, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:56:48,510 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 381 mSDsluCounter, 7224 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 7893 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:48,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 7893 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 04:56:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11570 states. [2021-11-19 04:56:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11570 to 11324. [2021-11-19 04:56:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11324 states, 8843 states have (on average 1.2974103810923894) internal successors, (11473), 8962 states have internal predecessors, (11473), 1679 states have call successors, (1679), 703 states have call predecessors, (1679), 801 states have return successors, (1842), 1658 states have call predecessors, (1842), 1677 states have call successors, (1842) [2021-11-19 04:56:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11324 states to 11324 states and 14994 transitions. [2021-11-19 04:56:49,823 INFO L78 Accepts]: Start accepts. Automaton has 11324 states and 14994 transitions. Word has length 281 [2021-11-19 04:56:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:49,823 INFO L470 AbstractCegarLoop]: Abstraction has 11324 states and 14994 transitions. [2021-11-19 04:56:49,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.96) internal successors, (199), 20 states have internal predecessors, (199), 3 states have call successors, (57), 7 states have call predecessors, (57), 2 states have return successors, (43), 2 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-19 04:56:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 11324 states and 14994 transitions. [2021-11-19 04:56:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-19 04:56:49,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:49,839 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:49,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 04:56:50,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:50,040 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:56:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:50,041 INFO L85 PathProgramCache]: Analyzing trace with hash 124932356, now seen corresponding path program 6 times [2021-11-19 04:56:50,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:50,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639032383] [2021-11-19 04:56:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:50,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:56:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:56:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:56:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-19 04:56:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:56:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:56:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-19 04:56:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:56:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-19 04:56:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:56:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:56:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-19 04:56:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-19 04:56:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:56:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-19 04:56:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 04:56:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-19 04:56:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-19 04:56:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-19 04:56:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:50,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-19 04:56:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-11-19 04:56:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-11-19 04:56:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-11-19 04:56:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-11-19 04:56:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2021-11-19 04:56:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2021-11-19 04:56:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:56:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:56:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:56:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:56:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:56:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:56:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-19 04:56:51,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:51,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639032383] [2021-11-19 04:56:51,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639032383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:56:51,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197579541] [2021-11-19 04:56:51,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:56:51,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:51,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:56:51,339 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:56:51,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3139fec6-3c4c-4996-b68b-5c12783c13d8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process