./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4d5b4b32fa0da80203e2a18166964cfde265e42cc1a9ca2751016d17ee22d414 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:14:09,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:14:09,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:14:09,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:14:09,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:14:09,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:14:09,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:14:09,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:14:09,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:14:09,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:14:09,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:14:09,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:14:09,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:14:09,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:14:09,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:14:09,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:14:09,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:14:09,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:14:09,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:14:09,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:14:09,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:14:09,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:14:09,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:14:09,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:14:09,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:14:09,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:14:09,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:14:09,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:14:09,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:14:09,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:14:09,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:14:09,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:14:09,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:14:09,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:14:09,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:14:09,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:14:09,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:14:09,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:14:09,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:14:09,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:14:09,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:14:09,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 18:14:10,039 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:14:10,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:14:10,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:14:10,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:14:10,046 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:14:10,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:14:10,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:14:10,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:14:10,047 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:14:10,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:14:10,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:14:10,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:14:10,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:14:10,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:14:10,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:14:10,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:14:10,049 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:14:10,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:14:10,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:14:10,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:14:10,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:14:10,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:14:10,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:14:10,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:14:10,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:14:10,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:14:10,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:14:10,052 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:14:10,052 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:14:10,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:14:10,053 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:14:10,053 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_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d5b4b32fa0da80203e2a18166964cfde265e42cc1a9ca2751016d17ee22d414 [2021-11-13 18:14:10,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:14:10,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:14:10,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:14:10,502 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:14:10,503 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:14:10,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i [2021-11-13 18:14:10,607 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/data/372fe0ce7/077a9fbe9527435c9d4cd4115d7c8ed6/FLAG28a5356d7 [2021-11-13 18:14:11,754 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:14:11,756 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i [2021-11-13 18:14:11,828 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/data/372fe0ce7/077a9fbe9527435c9d4cd4115d7c8ed6/FLAG28a5356d7 [2021-11-13 18:14:12,107 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/data/372fe0ce7/077a9fbe9527435c9d4cd4115d7c8ed6 [2021-11-13 18:14:12,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:14:12,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:14:12,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:14:12,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:14:12,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:14:12,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:14:12" (1/1) ... [2021-11-13 18:14:12,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8a01bc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:12, skipping insertion in model container [2021-11-13 18:14:12,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:14:12" (1/1) ... [2021-11-13 18:14:12,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:14:12,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:14:13,536 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i[110947,110960] [2021-11-13 18:14:14,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:14:14,451 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:14:14,653 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i[110947,110960] [2021-11-13 18:14:15,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:14:15,139 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:14:15,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:15 WrapperNode [2021-11-13 18:14:15,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:14:15,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:14:15,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:14:15,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:14:15,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:15" (1/1) ... [2021-11-13 18:14:15,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:15" (1/1) ... [2021-11-13 18:14:15,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:14:15,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:14:15,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:14:15,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:14:15,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:15" (1/1) ... [2021-11-13 18:14:15,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:15" (1/1) ... [2021-11-13 18:14:15,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:15" (1/1) ... [2021-11-13 18:14:15,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:15" (1/1) ... [2021-11-13 18:14:15,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:15" (1/1) ... [2021-11-13 18:14:15,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:15" (1/1) ... [2021-11-13 18:14:15,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:15" (1/1) ... [2021-11-13 18:14:15,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:14:15,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:14:15,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:14:15,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:14:15,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:15" (1/1) ... [2021-11-13 18:14:16,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:14:16,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:14:16,037 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:14:16,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:14:16,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-13 18:14:16,102 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-13 18:14:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure ti_bulk_in_callback [2021-11-13 18:14:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_bulk_in_callback [2021-11-13 18:14:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-13 18:14:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-13 18:14:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-13 18:14:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 18:14:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 18:14:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:14:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:14:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure tty_kref_put [2021-11-13 18:14:16,105 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_kref_put [2021-11-13 18:14:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure ti_throttle [2021-11-13 18:14:16,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_throttle [2021-11-13 18:14:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-13 18:14:16,105 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-13 18:14:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:14:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:14:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure ti_bulk_out_callback [2021-11-13 18:14:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_bulk_out_callback [2021-11-13 18:14:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible_nested [2021-11-13 18:14:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible_nested [2021-11-13 18:14:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2021-11-13 18:14:16,107 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2021-11-13 18:14:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure ti_set_mcr [2021-11-13 18:14:16,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_set_mcr [2021-11-13 18:14:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 18:14:16,107 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 18:14:16,108 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:14:16,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:14:16,108 INFO L130 BoogieDeclarations]: Found specification of procedure ti_startup [2021-11-13 18:14:16,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_startup [2021-11-13 18:14:16,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 18:14:16,108 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 18:14:16,109 INFO L130 BoogieDeclarations]: Found specification of procedure ti_ioctl [2021-11-13 18:14:16,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_ioctl [2021-11-13 18:14:16,109 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:14:16,109 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:14:16,109 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_2 [2021-11-13 18:14:16,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_2 [2021-11-13 18:14:16,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_1 [2021-11-13 18:14:16,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_1 [2021-11-13 18:14:16,111 INFO L130 BoogieDeclarations]: Found specification of procedure ti_tiocmget [2021-11-13 18:14:16,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_tiocmget [2021-11-13 18:14:16,111 INFO L130 BoogieDeclarations]: Found specification of procedure msleep_interruptible [2021-11-13 18:14:16,111 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep_interruptible [2021-11-13 18:14:16,111 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_free [2021-11-13 18:14:16,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_free [2021-11-13 18:14:16,112 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2021-11-13 18:14:16,112 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2021-11-13 18:14:16,112 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-13 18:14:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-13 18:14:16,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:14:16,113 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2021-11-13 18:14:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2021-11-13 18:14:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure ti_break [2021-11-13 18:14:16,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_break [2021-11-13 18:14:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure __swab16s [2021-11-13 18:14:16,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __swab16s [2021-11-13 18:14:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:14:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-13 18:14:16,117 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-13 18:14:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-13 18:14:16,117 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-13 18:14:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:14:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure ti_write [2021-11-13 18:14:16,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_write [2021-11-13 18:14:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:14:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure ti_restart_read [2021-11-13 18:14:16,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_restart_read [2021-11-13 18:14:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-11-13 18:14:16,119 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-11-13 18:14:16,120 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-13 18:14:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-13 18:14:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure ti_release [2021-11-13 18:14:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_release [2021-11-13 18:14:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-11-13 18:14:16,122 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-11-13 18:14:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:14:16,122 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:14:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_s_reg [2021-11-13 18:14:16,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_s_reg [2021-11-13 18:14:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 18:14:16,123 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 18:14:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-13 18:14:16,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-13 18:14:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-13 18:14:16,124 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-13 18:14:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-13 18:14:16,124 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-13 18:14:16,125 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_get [2021-11-13 18:14:16,125 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_get [2021-11-13 18:14:16,125 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-13 18:14:16,125 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-13 18:14:16,126 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2021-11-13 18:14:16,126 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2021-11-13 18:14:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-13 18:14:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 18:14:16,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 18:14:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-13 18:14:16,129 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-13 18:14:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-13 18:14:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:14:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_port_data [2021-11-13 18:14:16,129 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_port_data [2021-11-13 18:14:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure ti_command_out_sync [2021-11-13 18:14:16,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_command_out_sync [2021-11-13 18:14:16,130 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 18:14:16,130 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 18:14:16,130 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 18:14:16,130 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 18:14:16,130 INFO L130 BoogieDeclarations]: Found specification of procedure ti_open [2021-11-13 18:14:16,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_open [2021-11-13 18:14:16,131 INFO L130 BoogieDeclarations]: Found specification of procedure ti_tiocmset [2021-11-13 18:14:16,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_tiocmset [2021-11-13 18:14:16,132 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:14:16,132 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:14:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:14:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-13 18:14:16,137 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-13 18:14:16,137 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_s_der [2021-11-13 18:14:16,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_s_der [2021-11-13 18:14:16,138 INFO L130 BoogieDeclarations]: Found specification of procedure ti_write_byte [2021-11-13 18:14:16,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_write_byte [2021-11-13 18:14:16,140 INFO L130 BoogieDeclarations]: Found specification of procedure ti_chars_in_buffer [2021-11-13 18:14:16,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_chars_in_buffer [2021-11-13 18:14:16,141 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:14:16,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:14:16,146 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-13 18:14:16,147 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-13 18:14:16,147 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_register [2021-11-13 18:14:16,147 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_register [2021-11-13 18:14:16,147 INFO L130 BoogieDeclarations]: Found specification of procedure ti_write_room [2021-11-13 18:14:16,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_write_room [2021-11-13 18:14:16,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:14:16,148 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-11-13 18:14:16,148 INFO L130 BoogieDeclarations]: Found specification of procedure ti_interrupt_callback [2021-11-13 18:14:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_interrupt_callback [2021-11-13 18:14:16,148 INFO L130 BoogieDeclarations]: Found specification of procedure tty_wakeup [2021-11-13 18:14:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_wakeup [2021-11-13 18:14:16,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:14:16,148 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-13 18:14:16,149 INFO L130 BoogieDeclarations]: Found specification of procedure ti_close [2021-11-13 18:14:16,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_close [2021-11-13 18:14:16,149 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-13 18:14:16,149 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-13 18:14:16,149 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-13 18:14:16,149 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-13 18:14:16,150 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-11-13 18:14:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-11-13 18:14:16,150 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-13 18:14:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-13 18:14:16,150 INFO L130 BoogieDeclarations]: Found specification of procedure ti_unthrottle [2021-11-13 18:14:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_unthrottle [2021-11-13 18:14:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure request_firmware [2021-11-13 18:14:16,151 INFO L138 BoogieDeclarations]: Found implementation of procedure request_firmware [2021-11-13 18:14:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-13 18:14:16,151 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-13 18:14:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure ti_send [2021-11-13 18:14:16,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_send [2021-11-13 18:14:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-13 18:14:16,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-13 18:14:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure ti_drain [2021-11-13 18:14:16,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_drain [2021-11-13 18:14:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:14:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure ti_set_termios [2021-11-13 18:14:16,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_set_termios [2021-11-13 18:14:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_data [2021-11-13 18:14:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_data [2021-11-13 18:14:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:14:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:14:18,035 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:18:08,761 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:18:08,764 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:18:08,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:18:08 BoogieIcfgContainer [2021-11-13 18:18:08,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:18:08,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:18:08,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:18:08,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:18:08,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:14:12" (1/3) ... [2021-11-13 18:18:08,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b74fd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:18:08, skipping insertion in model container [2021-11-13 18:18:08,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:14:15" (2/3) ... [2021-11-13 18:18:08,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b74fd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:18:08, skipping insertion in model container [2021-11-13 18:18:08,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:18:08" (3/3) ... [2021-11-13 18:18:08,780 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i [2021-11-13 18:18:08,787 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:18:08,787 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:18:08,882 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:18:08,894 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:18:08,895 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:18:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 1579 states, 1153 states have (on average 1.4388551604509974) internal successors, (1659), 1182 states have internal predecessors, (1659), 348 states have call successors, (348), 77 states have call predecessors, (348), 76 states have return successors, (343), 341 states have call predecessors, (343), 343 states have call successors, (343) [2021-11-13 18:18:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 18:18:09,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:09,003 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:09,004 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:09,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:09,015 INFO L85 PathProgramCache]: Analyzing trace with hash 149749609, now seen corresponding path program 1 times [2021-11-13 18:18:09,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:09,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975156811] [2021-11-13 18:18:09,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:09,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:10,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:18:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:10,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:18:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:10,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:18:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:10,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:18:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:10,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:18:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:18:10,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:10,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975156811] [2021-11-13 18:18:10,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975156811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:10,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:10,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:18:10,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952576847] [2021-11-13 18:18:10,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:10,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:18:10,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:18:10,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:18:10,530 INFO L87 Difference]: Start difference. First operand has 1579 states, 1153 states have (on average 1.4388551604509974) internal successors, (1659), 1182 states have internal predecessors, (1659), 348 states have call successors, (348), 77 states have call predecessors, (348), 76 states have return successors, (343), 341 states have call predecessors, (343), 343 states have call successors, (343) Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:18:12,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:18:14,882 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:18:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:22,724 INFO L93 Difference]: Finished difference Result 5019 states and 8047 transitions. [2021-11-13 18:18:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:18:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-11-13 18:18:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:22,820 INFO L225 Difference]: With dead ends: 5019 [2021-11-13 18:18:22,821 INFO L226 Difference]: Without dead ends: 3427 [2021-11-13 18:18:22,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:18:22,883 INFO L933 BasicCegarLoop]: 2786 mSDtfsCounter, 3015 mSDsluCounter, 3572 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 917 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10424.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3230 SdHoareTripleChecker+Valid, 6358 SdHoareTripleChecker+Invalid, 2328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 103.91ms SdHoareTripleChecker+Time, 917 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11522.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:22,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3230 Valid, 6358 Invalid, 2328 Unknown, 0 Unchecked, 103.91ms Time], IncrementalHoareTripleChecker [917 Valid, 1409 Invalid, 2 Unknown, 0 Unchecked, 11522.87ms Time] [2021-11-13 18:18:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2021-11-13 18:18:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 2905. [2021-11-13 18:18:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2905 states, 2118 states have (on average 1.4291784702549575) internal successors, (3027), 2156 states have internal predecessors, (3027), 643 states have call successors, (643), 144 states have call predecessors, (643), 143 states have return successors, (638), 634 states have call predecessors, (638), 638 states have call successors, (638) [2021-11-13 18:18:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2905 states to 2905 states and 4308 transitions. [2021-11-13 18:18:23,328 INFO L78 Accepts]: Start accepts. Automaton has 2905 states and 4308 transitions. Word has length 43 [2021-11-13 18:18:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:23,330 INFO L470 AbstractCegarLoop]: Abstraction has 2905 states and 4308 transitions. [2021-11-13 18:18:23,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:18:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2905 states and 4308 transitions. [2021-11-13 18:18:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 18:18:23,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:23,366 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:23,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:18:23,367 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash 523415031, now seen corresponding path program 1 times [2021-11-13 18:18:23,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:23,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231048636] [2021-11-13 18:18:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:23,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:24,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:18:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:24,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:18:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:24,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:18:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:24,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:18:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:24,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:18:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:24,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:18:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:24,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:18:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:18:24,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:24,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231048636] [2021-11-13 18:18:24,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231048636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:24,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:24,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:18:24,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116445995] [2021-11-13 18:18:24,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:24,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:18:24,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:24,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:18:24,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:18:24,235 INFO L87 Difference]: Start difference. First operand 2905 states and 4308 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:18:26,385 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:18:28,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:18:43,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:43,213 INFO L93 Difference]: Finished difference Result 6810 states and 10600 transitions. [2021-11-13 18:18:43,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:18:43,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2021-11-13 18:18:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:43,296 INFO L225 Difference]: With dead ends: 6810 [2021-11-13 18:18:43,296 INFO L226 Difference]: Without dead ends: 6797 [2021-11-13 18:18:43,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:18:43,304 INFO L933 BasicCegarLoop]: 2397 mSDtfsCounter, 4950 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 3958 mSolverCounterSat, 2480 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16496.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5284 SdHoareTripleChecker+Valid, 4651 SdHoareTripleChecker+Invalid, 6440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 95.38ms SdHoareTripleChecker+Time, 2480 IncrementalHoareTripleChecker+Valid, 3958 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18264.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:43,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5284 Valid, 4651 Invalid, 6440 Unknown, 0 Unchecked, 95.38ms Time], IncrementalHoareTripleChecker [2480 Valid, 3958 Invalid, 2 Unknown, 0 Unchecked, 18264.17ms Time] [2021-11-13 18:18:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6797 states. [2021-11-13 18:18:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6797 to 5755. [2021-11-13 18:18:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5755 states, 4201 states have (on average 1.4310878362294692) internal successors, (6012), 4274 states have internal predecessors, (6012), 1271 states have call successors, (1271), 285 states have call predecessors, (1271), 282 states have return successors, (1266), 1255 states have call predecessors, (1266), 1266 states have call successors, (1266) [2021-11-13 18:18:43,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5755 states to 5755 states and 8549 transitions. [2021-11-13 18:18:43,694 INFO L78 Accepts]: Start accepts. Automaton has 5755 states and 8549 transitions. Word has length 66 [2021-11-13 18:18:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:43,695 INFO L470 AbstractCegarLoop]: Abstraction has 5755 states and 8549 transitions. [2021-11-13 18:18:43,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:18:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 5755 states and 8549 transitions. [2021-11-13 18:18:43,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:18:43,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:43,709 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:43,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:18:43,710 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:43,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:43,710 INFO L85 PathProgramCache]: Analyzing trace with hash -954625062, now seen corresponding path program 1 times [2021-11-13 18:18:43,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:43,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433987592] [2021-11-13 18:18:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:43,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:44,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:18:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:44,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:18:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:44,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:18:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:44,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:18:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:44,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:18:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:44,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:18:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:45,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:18:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:18:45,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:45,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433987592] [2021-11-13 18:18:45,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433987592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:45,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:45,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:18:45,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106162457] [2021-11-13 18:18:45,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:45,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:18:45,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:45,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:18:45,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:18:45,025 INFO L87 Difference]: Start difference. First operand 5755 states and 8549 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:18:47,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:18:49,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:18:59,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:59,582 INFO L93 Difference]: Finished difference Result 12927 states and 19855 transitions. [2021-11-13 18:18:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:18:59,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2021-11-13 18:18:59,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:59,652 INFO L225 Difference]: With dead ends: 12927 [2021-11-13 18:18:59,652 INFO L226 Difference]: Without dead ends: 7185 [2021-11-13 18:18:59,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:18:59,689 INFO L933 BasicCegarLoop]: 2458 mSDtfsCounter, 4165 mSDsluCounter, 2840 mSDsCounter, 0 mSdLazyCounter, 3308 mSolverCounterSat, 2153 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12805.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4347 SdHoareTripleChecker+Valid, 5298 SdHoareTripleChecker+Invalid, 5463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 67.19ms SdHoareTripleChecker+Time, 2153 IncrementalHoareTripleChecker+Valid, 3308 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14023.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:59,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4347 Valid, 5298 Invalid, 5463 Unknown, 0 Unchecked, 67.19ms Time], IncrementalHoareTripleChecker [2153 Valid, 3308 Invalid, 2 Unknown, 0 Unchecked, 14023.81ms Time] [2021-11-13 18:18:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7185 states. [2021-11-13 18:19:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7185 to 5755. [2021-11-13 18:19:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5755 states, 4201 states have (on average 1.430611759104975) internal successors, (6010), 4274 states have internal predecessors, (6010), 1271 states have call successors, (1271), 285 states have call predecessors, (1271), 282 states have return successors, (1266), 1255 states have call predecessors, (1266), 1266 states have call successors, (1266) [2021-11-13 18:19:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5755 states to 5755 states and 8547 transitions. [2021-11-13 18:19:00,045 INFO L78 Accepts]: Start accepts. Automaton has 5755 states and 8547 transitions. Word has length 67 [2021-11-13 18:19:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:00,048 INFO L470 AbstractCegarLoop]: Abstraction has 5755 states and 8547 transitions. [2021-11-13 18:19:00,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:19:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 5755 states and 8547 transitions. [2021-11-13 18:19:00,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:19:00,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:00,055 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:00,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:19:00,055 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:00,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:00,056 INFO L85 PathProgramCache]: Analyzing trace with hash -892585448, now seen corresponding path program 1 times [2021-11-13 18:19:00,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:00,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397908648] [2021-11-13 18:19:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:00,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:00,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:00,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:19:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:00,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:19:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:00,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:19:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:00,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:19:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:00,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:19:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:00,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:19:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:19:00,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:00,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397908648] [2021-11-13 18:19:00,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397908648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:00,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:00,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:19:00,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541172252] [2021-11-13 18:19:00,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:00,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:19:00,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:00,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:19:00,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:19:00,797 INFO L87 Difference]: Start difference. First operand 5755 states and 8547 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:19:02,915 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:05,034 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:10,790 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:13,963 INFO L93 Difference]: Finished difference Result 12927 states and 19851 transitions. [2021-11-13 18:19:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:19:13,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2021-11-13 18:19:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:14,024 INFO L225 Difference]: With dead ends: 12927 [2021-11-13 18:19:14,024 INFO L226 Difference]: Without dead ends: 7185 [2021-11-13 18:19:14,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:19:14,054 INFO L933 BasicCegarLoop]: 2509 mSDtfsCounter, 4092 mSDsluCounter, 2888 mSDsCounter, 0 mSdLazyCounter, 3352 mSolverCounterSat, 2114 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11675.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4272 SdHoareTripleChecker+Valid, 5397 SdHoareTripleChecker+Invalid, 5468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.44ms SdHoareTripleChecker+Time, 2114 IncrementalHoareTripleChecker+Valid, 3352 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12703.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:14,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4272 Valid, 5397 Invalid, 5468 Unknown, 0 Unchecked, 39.44ms Time], IncrementalHoareTripleChecker [2114 Valid, 3352 Invalid, 2 Unknown, 0 Unchecked, 12703.21ms Time] [2021-11-13 18:19:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7185 states. [2021-11-13 18:19:14,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7185 to 5755. [2021-11-13 18:19:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5755 states, 4201 states have (on average 1.430135681980481) internal successors, (6008), 4274 states have internal predecessors, (6008), 1271 states have call successors, (1271), 285 states have call predecessors, (1271), 282 states have return successors, (1266), 1255 states have call predecessors, (1266), 1266 states have call successors, (1266) [2021-11-13 18:19:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5755 states to 5755 states and 8545 transitions. [2021-11-13 18:19:14,469 INFO L78 Accepts]: Start accepts. Automaton has 5755 states and 8545 transitions. Word has length 67 [2021-11-13 18:19:14,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:14,470 INFO L470 AbstractCegarLoop]: Abstraction has 5755 states and 8545 transitions. [2021-11-13 18:19:14,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:19:14,471 INFO L276 IsEmpty]: Start isEmpty. Operand 5755 states and 8545 transitions. [2021-11-13 18:19:14,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:19:14,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:14,478 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:14,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:19:14,479 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:14,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1596943514, now seen corresponding path program 1 times [2021-11-13 18:19:14,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:14,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281021893] [2021-11-13 18:19:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:14,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:22,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:22,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:19:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:22,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:19:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:22,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:19:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:22,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:19:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:22,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:19:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:22,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:19:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:19:22,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:22,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281021893] [2021-11-13 18:19:22,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281021893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:22,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:22,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 18:19:22,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871150588] [2021-11-13 18:19:22,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:22,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:19:22,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:22,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:19:22,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:19:22,215 INFO L87 Difference]: Start difference. First operand 5755 states and 8545 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:19:24,356 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:26,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:36,321 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:43,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:43,388 INFO L93 Difference]: Finished difference Result 16645 states and 26898 transitions. [2021-11-13 18:19:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:19:43,389 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 67 [2021-11-13 18:19:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:43,491 INFO L225 Difference]: With dead ends: 16645 [2021-11-13 18:19:43,491 INFO L226 Difference]: Without dead ends: 10903 [2021-11-13 18:19:43,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:19:43,527 INFO L933 BasicCegarLoop]: 3078 mSDtfsCounter, 4545 mSDsluCounter, 11556 mSDsCounter, 0 mSdLazyCounter, 9047 mSolverCounterSat, 2001 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18912.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4948 SdHoareTripleChecker+Valid, 14634 SdHoareTripleChecker+Invalid, 11050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 85.16ms SdHoareTripleChecker+Time, 2001 IncrementalHoareTripleChecker+Valid, 9047 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20471.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:43,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4948 Valid, 14634 Invalid, 11050 Unknown, 0 Unchecked, 85.16ms Time], IncrementalHoareTripleChecker [2001 Valid, 9047 Invalid, 2 Unknown, 0 Unchecked, 20471.05ms Time] [2021-11-13 18:19:43,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10903 states. [2021-11-13 18:19:43,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10903 to 5765. [2021-11-13 18:19:44,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5765 states, 4209 states have (on average 1.4293181278213352) internal successors, (6016), 4282 states have internal predecessors, (6016), 1271 states have call successors, (1271), 285 states have call predecessors, (1271), 284 states have return successors, (1270), 1257 states have call predecessors, (1270), 1266 states have call successors, (1270) [2021-11-13 18:19:44,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5765 states to 5765 states and 8557 transitions. [2021-11-13 18:19:44,033 INFO L78 Accepts]: Start accepts. Automaton has 5765 states and 8557 transitions. Word has length 67 [2021-11-13 18:19:44,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:44,034 INFO L470 AbstractCegarLoop]: Abstraction has 5765 states and 8557 transitions. [2021-11-13 18:19:44,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:19:44,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5765 states and 8557 transitions. [2021-11-13 18:19:44,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:19:44,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:44,041 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:44,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:19:44,041 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:44,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:44,042 INFO L85 PathProgramCache]: Analyzing trace with hash 585826264, now seen corresponding path program 1 times [2021-11-13 18:19:44,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:44,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29247365] [2021-11-13 18:19:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:44,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:19:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:19:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:19:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:19:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:19:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:19:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:19:44,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:44,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29247365] [2021-11-13 18:19:44,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29247365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:44,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:44,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:19:44,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842652075] [2021-11-13 18:19:44,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:44,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:19:44,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:44,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:19:44,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:19:44,549 INFO L87 Difference]: Start difference. First operand 5765 states and 8557 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:19:46,674 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:48,757 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:00,379 INFO L93 Difference]: Finished difference Result 19303 states and 29646 transitions. [2021-11-13 18:20:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:20:00,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 67 [2021-11-13 18:20:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:00,471 INFO L225 Difference]: With dead ends: 19303 [2021-11-13 18:20:00,471 INFO L226 Difference]: Without dead ends: 13548 [2021-11-13 18:20:00,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:20:00,502 INFO L933 BasicCegarLoop]: 2183 mSDtfsCounter, 5036 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 4356 mSolverCounterSat, 2473 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13822.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5369 SdHoareTripleChecker+Valid, 3916 SdHoareTripleChecker+Invalid, 6831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.77ms SdHoareTripleChecker+Time, 2473 IncrementalHoareTripleChecker+Valid, 4356 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15184.78ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:00,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5369 Valid, 3916 Invalid, 6831 Unknown, 0 Unchecked, 48.77ms Time], IncrementalHoareTripleChecker [2473 Valid, 4356 Invalid, 2 Unknown, 0 Unchecked, 15184.78ms Time] [2021-11-13 18:20:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13548 states. [2021-11-13 18:20:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13548 to 11468. [2021-11-13 18:20:01,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11468 states, 8380 states have (on average 1.4306682577565633) internal successors, (11989), 8525 states have internal predecessors, (11989), 2525 states have call successors, (2525), 565 states have call predecessors, (2525), 562 states have return successors, (2522), 2497 states have call predecessors, (2522), 2514 states have call successors, (2522) [2021-11-13 18:20:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11468 states to 11468 states and 17036 transitions. [2021-11-13 18:20:01,421 INFO L78 Accepts]: Start accepts. Automaton has 11468 states and 17036 transitions. Word has length 67 [2021-11-13 18:20:01,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:01,421 INFO L470 AbstractCegarLoop]: Abstraction has 11468 states and 17036 transitions. [2021-11-13 18:20:01,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:20:01,422 INFO L276 IsEmpty]: Start isEmpty. Operand 11468 states and 17036 transitions. [2021-11-13 18:20:01,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-13 18:20:01,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:01,431 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-13 18:20:01,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:20:01,432 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash 336334063, now seen corresponding path program 1 times [2021-11-13 18:20:01,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:01,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240256271] [2021-11-13 18:20:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:01,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:01,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:01,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:20:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:01,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:20:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:01,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:20:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:01,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:20:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:01,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:20:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:01,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:20:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:01,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 18:20:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:01,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:20:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 18:20:01,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:01,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240256271] [2021-11-13 18:20:01,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240256271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:01,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:01,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:20:01,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379334119] [2021-11-13 18:20:01,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:01,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:20:01,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:01,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:20:01,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:20:01,944 INFO L87 Difference]: Start difference. First operand 11468 states and 17036 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-13 18:20:04,077 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:06,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:08,207 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:22,233 INFO L93 Difference]: Finished difference Result 13551 states and 21092 transitions. [2021-11-13 18:20:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:20:22,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 78 [2021-11-13 18:20:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:22,309 INFO L225 Difference]: With dead ends: 13551 [2021-11-13 18:20:22,310 INFO L226 Difference]: Without dead ends: 13548 [2021-11-13 18:20:22,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:20:22,319 INFO L933 BasicCegarLoop]: 3821 mSDtfsCounter, 3557 mSDsluCounter, 2612 mSDsCounter, 0 mSdLazyCounter, 5059 mSolverCounterSat, 1860 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18036.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3952 SdHoareTripleChecker+Valid, 6433 SdHoareTripleChecker+Invalid, 6922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.86ms SdHoareTripleChecker+Time, 1860 IncrementalHoareTripleChecker+Valid, 5059 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19539.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:22,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3952 Valid, 6433 Invalid, 6922 Unknown, 0 Unchecked, 49.86ms Time], IncrementalHoareTripleChecker [1860 Valid, 5059 Invalid, 3 Unknown, 0 Unchecked, 19539.64ms Time] [2021-11-13 18:20:22,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13548 states. [2021-11-13 18:20:22,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13548 to 11472. [2021-11-13 18:20:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11472 states, 8382 states have (on average 1.4303268909568123) internal successors, (11989), 8529 states have internal predecessors, (11989), 2525 states have call successors, (2525), 565 states have call predecessors, (2525), 564 states have return successors, (2522), 2497 states have call predecessors, (2522), 2514 states have call successors, (2522) [2021-11-13 18:20:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11472 states to 11472 states and 17036 transitions. [2021-11-13 18:20:23,005 INFO L78 Accepts]: Start accepts. Automaton has 11472 states and 17036 transitions. Word has length 78 [2021-11-13 18:20:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:23,007 INFO L470 AbstractCegarLoop]: Abstraction has 11472 states and 17036 transitions. [2021-11-13 18:20:23,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-13 18:20:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 11472 states and 17036 transitions. [2021-11-13 18:20:23,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-13 18:20:23,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:23,023 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-13 18:20:23,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:20:23,024 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:23,024 INFO L85 PathProgramCache]: Analyzing trace with hash 735048111, now seen corresponding path program 1 times [2021-11-13 18:20:23,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:23,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556821801] [2021-11-13 18:20:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:23,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:30,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:30,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:20:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:30,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:20:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:30,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:20:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:30,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:20:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:30,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:20:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:30,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:20:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:30,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 18:20:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:30,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:20:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 18:20:30,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:30,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556821801] [2021-11-13 18:20:30,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556821801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:20:30,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424813572] [2021-11-13 18:20:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:30,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:20:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:20:30,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:20:30,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:20:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 4131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 18:20:32,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:20:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:20:32,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:20:32,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424813572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:32,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:20:32,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 9 [2021-11-13 18:20:32,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75968352] [2021-11-13 18:20:32,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:32,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:20:32,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:32,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:20:32,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:20:32,802 INFO L87 Difference]: Start difference. First operand 11472 states and 17036 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:20:33,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:33,970 INFO L93 Difference]: Finished difference Result 22890 states and 34534 transitions. [2021-11-13 18:20:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:20:33,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 78 [2021-11-13 18:20:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:34,045 INFO L225 Difference]: With dead ends: 22890 [2021-11-13 18:20:34,045 INFO L226 Difference]: Without dead ends: 11431 [2021-11-13 18:20:34,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:20:34,089 INFO L933 BasicCegarLoop]: 3027 mSDtfsCounter, 1850 mSDsluCounter, 14086 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 403.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1968 SdHoareTripleChecker+Valid, 17113 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.91ms SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 466.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:34,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1968 Valid, 17113 Invalid, 418 Unknown, 0 Unchecked, 23.91ms Time], IncrementalHoareTripleChecker [350 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 466.25ms Time] [2021-11-13 18:20:34,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11431 states. [2021-11-13 18:20:34,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11431 to 8602. [2021-11-13 18:20:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8602 states, 6283 states have (on average 1.4295718605761578) internal successors, (8982), 6392 states have internal predecessors, (8982), 1894 states have call successors, (1894), 425 states have call predecessors, (1894), 424 states have return successors, (1892), 1874 states have call predecessors, (1892), 1887 states have call successors, (1892) [2021-11-13 18:20:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8602 states to 8602 states and 12768 transitions. [2021-11-13 18:20:34,669 INFO L78 Accepts]: Start accepts. Automaton has 8602 states and 12768 transitions. Word has length 78 [2021-11-13 18:20:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:34,669 INFO L470 AbstractCegarLoop]: Abstraction has 8602 states and 12768 transitions. [2021-11-13 18:20:34,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:20:34,670 INFO L276 IsEmpty]: Start isEmpty. Operand 8602 states and 12768 transitions. [2021-11-13 18:20:34,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-13 18:20:34,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:34,680 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-13 18:20:34,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 18:20:34,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:20:34,903 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:34,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:34,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2053836859, now seen corresponding path program 1 times [2021-11-13 18:20:34,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:34,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078907598] [2021-11-13 18:20:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:34,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:35,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:35,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:20:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:35,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:20:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:35,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:20:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:35,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:20:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:35,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:20:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:35,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:20:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:35,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 18:20:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:35,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:20:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 18:20:35,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:35,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078907598] [2021-11-13 18:20:35,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078907598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:35,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:35,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 18:20:35,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090585906] [2021-11-13 18:20:35,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:35,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:20:35,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:35,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:20:35,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:20:35,537 INFO L87 Difference]: Start difference. First operand 8602 states and 12768 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-13 18:20:37,662 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:39,766 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:57,176 INFO L93 Difference]: Finished difference Result 15100 states and 25165 transitions. [2021-11-13 18:20:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:20:57,177 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 83 [2021-11-13 18:20:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:57,266 INFO L225 Difference]: With dead ends: 15100 [2021-11-13 18:20:57,266 INFO L226 Difference]: Without dead ends: 15080 [2021-11-13 18:20:57,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:20:57,282 INFO L933 BasicCegarLoop]: 3172 mSDtfsCounter, 7306 mSDsluCounter, 10371 mSDsCounter, 0 mSdLazyCounter, 9613 mSolverCounterSat, 3274 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18872.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7679 SdHoareTripleChecker+Valid, 13543 SdHoareTripleChecker+Invalid, 12889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 88.26ms SdHoareTripleChecker+Time, 3274 IncrementalHoareTripleChecker+Valid, 9613 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20643.78ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:57,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7679 Valid, 13543 Invalid, 12889 Unknown, 0 Unchecked, 88.26ms Time], IncrementalHoareTripleChecker [3274 Valid, 9613 Invalid, 2 Unknown, 0 Unchecked, 20643.78ms Time] [2021-11-13 18:20:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15080 states. [2021-11-13 18:20:57,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15080 to 8606. [2021-11-13 18:20:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8606 states, 6287 states have (on average 1.4292985525687927) internal successors, (8986), 6396 states have internal predecessors, (8986), 1894 states have call successors, (1894), 425 states have call predecessors, (1894), 424 states have return successors, (1892), 1874 states have call predecessors, (1892), 1887 states have call successors, (1892) [2021-11-13 18:20:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8606 states to 8606 states and 12772 transitions. [2021-11-13 18:20:57,912 INFO L78 Accepts]: Start accepts. Automaton has 8606 states and 12772 transitions. Word has length 83 [2021-11-13 18:20:57,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:57,912 INFO L470 AbstractCegarLoop]: Abstraction has 8606 states and 12772 transitions. [2021-11-13 18:20:57,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-13 18:20:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 8606 states and 12772 transitions. [2021-11-13 18:20:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-13 18:20:57,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:57,923 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-13 18:20:57,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:20:57,923 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:57,924 INFO L85 PathProgramCache]: Analyzing trace with hash 360233818, now seen corresponding path program 1 times [2021-11-13 18:20:57,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:57,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710397528] [2021-11-13 18:20:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:57,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:58,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:58,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:20:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:58,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:20:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:58,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:20:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:58,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:20:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:58,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:20:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:58,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:20:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:58,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 18:20:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:58,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:20:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 18:20:58,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:58,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710397528] [2021-11-13 18:20:58,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710397528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:58,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:58,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:20:58,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386110906] [2021-11-13 18:20:58,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:58,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:20:58,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:58,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:20:58,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:20:58,367 INFO L87 Difference]: Start difference. First operand 8606 states and 12772 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-13 18:21:00,484 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:02,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:10,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:10,939 INFO L93 Difference]: Finished difference Result 16290 states and 25011 transitions. [2021-11-13 18:21:10,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:21:10,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 84 [2021-11-13 18:21:10,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:10,986 INFO L225 Difference]: With dead ends: 16290 [2021-11-13 18:21:10,987 INFO L226 Difference]: Without dead ends: 7697 [2021-11-13 18:21:11,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:11,017 INFO L933 BasicCegarLoop]: 2539 mSDtfsCounter, 4104 mSDsluCounter, 3037 mSDsCounter, 0 mSdLazyCounter, 3544 mSolverCounterSat, 1980 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11109.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4326 SdHoareTripleChecker+Valid, 5576 SdHoareTripleChecker+Invalid, 5526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.76ms SdHoareTripleChecker+Time, 1980 IncrementalHoareTripleChecker+Valid, 3544 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12066.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:11,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4326 Valid, 5576 Invalid, 5526 Unknown, 0 Unchecked, 34.76ms Time], IncrementalHoareTripleChecker [1980 Valid, 3544 Invalid, 2 Unknown, 0 Unchecked, 12066.73ms Time] [2021-11-13 18:21:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7697 states. [2021-11-13 18:21:11,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7697 to 5830. [2021-11-13 18:21:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5830 states, 4257 states have (on average 1.424712238665727) internal successors, (6065), 4332 states have internal predecessors, (6065), 1284 states have call successors, (1284), 289 states have call predecessors, (1284), 288 states have return successors, (1282), 1268 states have call predecessors, (1282), 1277 states have call successors, (1282) [2021-11-13 18:21:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5830 states to 5830 states and 8631 transitions. [2021-11-13 18:21:11,456 INFO L78 Accepts]: Start accepts. Automaton has 5830 states and 8631 transitions. Word has length 84 [2021-11-13 18:21:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:11,457 INFO L470 AbstractCegarLoop]: Abstraction has 5830 states and 8631 transitions. [2021-11-13 18:21:11,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-13 18:21:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5830 states and 8631 transitions. [2021-11-13 18:21:11,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 18:21:11,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:11,470 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-13 18:21:11,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:21:11,470 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:11,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2088350778, now seen corresponding path program 1 times [2021-11-13 18:21:11,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:11,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566054629] [2021-11-13 18:21:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:11,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:21:18,125 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:21:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:21:25,140 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:21:25,140 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:21:25,141 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:21:25,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:21:25,146 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:25,148 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:21:25,528 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:21:25,531 INFO L158 Benchmark]: Toolchain (without parser) took 433420.34ms. Allocated memory was 115.3MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 70.2MB in the beginning and 533.7MB in the end (delta: -463.5MB). Peak memory consumption was 968.9MB. Max. memory is 16.1GB. [2021-11-13 18:21:25,531 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 115.3MB. Free memory is still 95.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:21:25,532 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3029.37ms. Allocated memory was 115.3MB in the beginning and 140.5MB in the end (delta: 25.2MB). Free memory was 70.0MB in the beginning and 71.1MB in the end (delta: -1.1MB). Peak memory consumption was 62.6MB. Max. memory is 16.1GB. [2021-11-13 18:21:25,532 INFO L158 Benchmark]: Boogie Procedure Inliner took 430.03ms. Allocated memory is still 140.5MB. Free memory was 71.1MB in the beginning and 77.6MB in the end (delta: -6.5MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2021-11-13 18:21:25,533 INFO L158 Benchmark]: Boogie Preprocessor took 418.58ms. Allocated memory was 140.5MB in the beginning and 241.2MB in the end (delta: 100.7MB). Free memory was 77.6MB in the beginning and 167.3MB in the end (delta: -89.7MB). Peak memory consumption was 41.7MB. Max. memory is 16.1GB. [2021-11-13 18:21:25,533 INFO L158 Benchmark]: RCFGBuilder took 232776.43ms. Allocated memory was 241.2MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 167.3MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 917.2MB. Max. memory is 16.1GB. [2021-11-13 18:21:25,533 INFO L158 Benchmark]: TraceAbstraction took 196758.58ms. Allocated memory is still 1.5GB. Free memory was 1.3GB in the beginning and 533.7MB in the end (delta: 718.8MB). Peak memory consumption was 772.3MB. Max. memory is 16.1GB. [2021-11-13 18:21:25,535 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 115.3MB. Free memory is still 95.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3029.37ms. Allocated memory was 115.3MB in the beginning and 140.5MB in the end (delta: 25.2MB). Free memory was 70.0MB in the beginning and 71.1MB in the end (delta: -1.1MB). Peak memory consumption was 62.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 430.03ms. Allocated memory is still 140.5MB. Free memory was 71.1MB in the beginning and 77.6MB in the end (delta: -6.5MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 418.58ms. Allocated memory was 140.5MB in the beginning and 241.2MB in the end (delta: 100.7MB). Free memory was 77.6MB in the beginning and 167.3MB in the end (delta: -89.7MB). Peak memory consumption was 41.7MB. Max. memory is 16.1GB. * RCFGBuilder took 232776.43ms. Allocated memory was 241.2MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 167.3MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 917.2MB. Max. memory is 16.1GB. * TraceAbstraction took 196758.58ms. Allocated memory is still 1.5GB. Free memory was 1.3GB in the beginning and 533.7MB in the end (delta: 718.8MB). Peak memory consumption was 772.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:21:25,758 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-13 18:21:25,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4d5b4b32fa0da80203e2a18166964cfde265e42cc1a9ca2751016d17ee22d414 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:21:27,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:21:27,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:21:27,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:21:27,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:21:27,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:21:27,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:21:27,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:21:27,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:21:27,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:21:27,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:21:27,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:21:27,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:21:27,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:21:27,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:21:27,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:21:27,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:21:28,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:21:28,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:21:28,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:21:28,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:21:28,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:21:28,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:21:28,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:21:28,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:21:28,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:21:28,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:21:28,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:21:28,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:21:28,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:21:28,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:21:28,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:21:28,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:21:28,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:21:28,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:21:28,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:21:28,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:21:28,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:21:28,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:21:28,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:21:28,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:21:28,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-13 18:21:28,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:21:28,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:21:28,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:21:28,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:21:28,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:21:28,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:21:28,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:21:28,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:21:28,062 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:21:28,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:21:28,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:21:28,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:21:28,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:21:28,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:21:28,064 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:21:28,065 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:21:28,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:21:28,066 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:21:28,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:21:28,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:21:28,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:21:28,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:21:28,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:21:28,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:21:28,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:21:28,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:21:28,069 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:21:28,069 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:21:28,069 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:21:28,069 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:21:28,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:21:28,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:21:28,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:21:28,070 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d5b4b32fa0da80203e2a18166964cfde265e42cc1a9ca2751016d17ee22d414 [2021-11-13 18:21:28,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:21:28,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:21:28,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:21:28,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:21:28,515 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:21:28,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i [2021-11-13 18:21:28,578 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/data/b408633ea/a39c1ce6f7af4840b934716d7ae113a3/FLAGee8e83177 [2021-11-13 18:21:29,423 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:21:29,424 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i [2021-11-13 18:21:29,473 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/data/b408633ea/a39c1ce6f7af4840b934716d7ae113a3/FLAGee8e83177 [2021-11-13 18:21:29,905 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/data/b408633ea/a39c1ce6f7af4840b934716d7ae113a3 [2021-11-13 18:21:29,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:21:29,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:21:29,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:21:29,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:21:29,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:21:29,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:21:29" (1/1) ... [2021-11-13 18:21:29,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68df1e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:29, skipping insertion in model container [2021-11-13 18:21:29,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:21:29" (1/1) ... [2021-11-13 18:21:29,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:21:30,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:21:31,168 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i[110947,110960] [2021-11-13 18:21:31,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:21:31,728 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:21:31,897 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i[110947,110960] [2021-11-13 18:21:32,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:21:32,323 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:21:32,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:32 WrapperNode [2021-11-13 18:21:32,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:21:32,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:21:32,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:21:32,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:21:32,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:32" (1/1) ... [2021-11-13 18:21:32,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:32" (1/1) ... [2021-11-13 18:21:32,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:21:32,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:21:32,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:21:32,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:21:32,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:32" (1/1) ... [2021-11-13 18:21:32,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:32" (1/1) ... [2021-11-13 18:21:32,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:32" (1/1) ... [2021-11-13 18:21:32,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:32" (1/1) ... [2021-11-13 18:21:32,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:32" (1/1) ... [2021-11-13 18:21:32,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:32" (1/1) ... [2021-11-13 18:21:32,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:32" (1/1) ... [2021-11-13 18:21:33,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:21:33,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:21:33,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:21:33,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:21:33,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:32" (1/1) ... [2021-11-13 18:21:33,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:21:33,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:21:33,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:21:33,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:21:33,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 18:21:33,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-13 18:21:33,088 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-13 18:21:33,088 INFO L130 BoogieDeclarations]: Found specification of procedure ti_bulk_in_callback [2021-11-13 18:21:33,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_bulk_in_callback [2021-11-13 18:21:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-13 18:21:33,089 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-13 18:21:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 18:21:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-13 18:21:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:21:33,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 18:21:33,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 18:21:33,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 18:21:33,090 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:21:33,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:21:33,160 INFO L130 BoogieDeclarations]: Found specification of procedure tty_kref_put [2021-11-13 18:21:33,160 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_kref_put [2021-11-13 18:21:33,160 INFO L130 BoogieDeclarations]: Found specification of procedure ti_throttle [2021-11-13 18:21:33,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_throttle [2021-11-13 18:21:33,160 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-13 18:21:33,160 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-13 18:21:33,160 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:21:33,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:21:33,161 INFO L130 BoogieDeclarations]: Found specification of procedure ti_bulk_out_callback [2021-11-13 18:21:33,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_bulk_out_callback [2021-11-13 18:21:33,161 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible_nested [2021-11-13 18:21:33,161 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible_nested [2021-11-13 18:21:33,161 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2021-11-13 18:21:33,161 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2021-11-13 18:21:33,161 INFO L130 BoogieDeclarations]: Found specification of procedure ti_set_mcr [2021-11-13 18:21:33,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_set_mcr [2021-11-13 18:21:33,161 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 18:21:33,162 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 18:21:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:21:33,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:21:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure ti_startup [2021-11-13 18:21:33,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_startup [2021-11-13 18:21:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 18:21:33,162 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 18:21:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure ti_ioctl [2021-11-13 18:21:33,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_ioctl [2021-11-13 18:21:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:21:33,163 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:21:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_2 [2021-11-13 18:21:33,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_2 [2021-11-13 18:21:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_1 [2021-11-13 18:21:33,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_1 [2021-11-13 18:21:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure ti_tiocmget [2021-11-13 18:21:33,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_tiocmget [2021-11-13 18:21:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure msleep_interruptible [2021-11-13 18:21:33,163 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep_interruptible [2021-11-13 18:21:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_free [2021-11-13 18:21:33,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_free [2021-11-13 18:21:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2021-11-13 18:21:33,164 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2021-11-13 18:21:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-13 18:21:33,164 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-13 18:21:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:21:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2021-11-13 18:21:33,164 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2021-11-13 18:21:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure ti_break [2021-11-13 18:21:33,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_break [2021-11-13 18:21:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure __swab16s [2021-11-13 18:21:33,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __swab16s [2021-11-13 18:21:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:21:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-13 18:21:33,165 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-13 18:21:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-13 18:21:33,165 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-13 18:21:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 18:21:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 18:21:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:21:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:21:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure ti_write [2021-11-13 18:21:33,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_write [2021-11-13 18:21:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:21:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure ti_restart_read [2021-11-13 18:21:33,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_restart_read [2021-11-13 18:21:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-11-13 18:21:33,169 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-11-13 18:21:33,170 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-13 18:21:33,170 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-13 18:21:33,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 18:21:33,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:21:33,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 18:21:33,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 18:21:33,171 INFO L130 BoogieDeclarations]: Found specification of procedure ti_release [2021-11-13 18:21:33,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_release [2021-11-13 18:21:33,171 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-11-13 18:21:33,172 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-11-13 18:21:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:21:33,172 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:21:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_s_reg [2021-11-13 18:21:33,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_s_reg [2021-11-13 18:21:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 18:21:33,173 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 18:21:33,174 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-13 18:21:33,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-13 18:21:33,174 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-13 18:21:33,175 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-13 18:21:33,175 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-13 18:21:33,175 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-13 18:21:33,175 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_get [2021-11-13 18:21:33,176 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_get [2021-11-13 18:21:33,176 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-13 18:21:33,176 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-13 18:21:33,176 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2021-11-13 18:21:33,176 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2021-11-13 18:21:33,176 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 18:21:33,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 18:21:33,177 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-13 18:21:33,177 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-13 18:21:33,177 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_port_data [2021-11-13 18:21:33,177 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_port_data [2021-11-13 18:21:33,178 INFO L130 BoogieDeclarations]: Found specification of procedure ti_command_out_sync [2021-11-13 18:21:33,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_command_out_sync [2021-11-13 18:21:33,178 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 18:21:33,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 18:21:33,183 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 18:21:33,183 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 18:21:33,183 INFO L130 BoogieDeclarations]: Found specification of procedure ti_open [2021-11-13 18:21:33,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_open [2021-11-13 18:21:33,184 INFO L130 BoogieDeclarations]: Found specification of procedure ti_tiocmset [2021-11-13 18:21:33,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_tiocmset [2021-11-13 18:21:33,186 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:21:33,186 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:21:33,186 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-13 18:21:33,187 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-13 18:21:33,188 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_s_der [2021-11-13 18:21:33,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_s_der [2021-11-13 18:21:33,189 INFO L130 BoogieDeclarations]: Found specification of procedure ti_write_byte [2021-11-13 18:21:33,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_write_byte [2021-11-13 18:21:33,189 INFO L130 BoogieDeclarations]: Found specification of procedure ti_chars_in_buffer [2021-11-13 18:21:33,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_chars_in_buffer [2021-11-13 18:21:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-13 18:21:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-13 18:21:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-13 18:21:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-13 18:21:33,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:21:33,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:21:33,195 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-13 18:21:33,195 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-13 18:21:33,195 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_register [2021-11-13 18:21:33,195 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_register [2021-11-13 18:21:33,195 INFO L130 BoogieDeclarations]: Found specification of procedure ti_write_room [2021-11-13 18:21:33,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_write_room [2021-11-13 18:21:33,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:21:33,196 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-11-13 18:21:33,196 INFO L130 BoogieDeclarations]: Found specification of procedure ti_interrupt_callback [2021-11-13 18:21:33,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_interrupt_callback [2021-11-13 18:21:33,196 INFO L130 BoogieDeclarations]: Found specification of procedure tty_wakeup [2021-11-13 18:21:33,197 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_wakeup [2021-11-13 18:21:33,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:21:33,198 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-13 18:21:33,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-13 18:21:33,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-13 18:21:33,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-13 18:21:33,198 INFO L130 BoogieDeclarations]: Found specification of procedure ti_close [2021-11-13 18:21:33,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_close [2021-11-13 18:21:33,199 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-13 18:21:33,199 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-13 18:21:33,199 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-13 18:21:33,199 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-13 18:21:33,199 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-11-13 18:21:33,200 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-11-13 18:21:33,200 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-13 18:21:33,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-13 18:21:33,200 INFO L130 BoogieDeclarations]: Found specification of procedure ti_unthrottle [2021-11-13 18:21:33,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_unthrottle [2021-11-13 18:21:33,200 INFO L130 BoogieDeclarations]: Found specification of procedure request_firmware [2021-11-13 18:21:33,200 INFO L138 BoogieDeclarations]: Found implementation of procedure request_firmware [2021-11-13 18:21:33,201 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-13 18:21:33,201 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-13 18:21:33,201 INFO L130 BoogieDeclarations]: Found specification of procedure ti_send [2021-11-13 18:21:33,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_send [2021-11-13 18:21:33,201 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-13 18:21:33,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-13 18:21:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure ti_drain [2021-11-13 18:21:33,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_drain [2021-11-13 18:21:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-13 18:21:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure ti_set_termios [2021-11-13 18:21:33,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_set_termios [2021-11-13 18:21:33,203 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_data [2021-11-13 18:21:33,203 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_data [2021-11-13 18:21:33,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:21:33,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:21:34,422 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:25:51,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:25:51,169 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:25:51,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:25:51 BoogieIcfgContainer [2021-11-13 18:25:51,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:25:51,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:25:51,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:25:51,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:25:51,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:21:29" (1/3) ... [2021-11-13 18:25:51,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a472bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:25:51, skipping insertion in model container [2021-11-13 18:25:51,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:21:32" (2/3) ... [2021-11-13 18:25:51,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a472bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:25:51, skipping insertion in model container [2021-11-13 18:25:51,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:25:51" (3/3) ... [2021-11-13 18:25:51,183 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point.cil.out.i [2021-11-13 18:25:51,189 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:25:51,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:25:51,247 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:25:51,254 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:25:51,254 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:25:51,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 1579 states, 1153 states have (on average 1.4388551604509974) internal successors, (1659), 1182 states have internal predecessors, (1659), 348 states have call successors, (348), 77 states have call predecessors, (348), 76 states have return successors, (343), 341 states have call predecessors, (343), 343 states have call successors, (343) [2021-11-13 18:25:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 18:25:51,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:25:51,313 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:25:51,313 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:25:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:51,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2129372907, now seen corresponding path program 1 times [2021-11-13 18:25:51,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:25:51,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389761752] [2021-11-13 18:25:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:51,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:25:51,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:25:51,349 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:25:51,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:26:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:01,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 2409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:26:01,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:26:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:26:01,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:26:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:26:01,986 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:26:01,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389761752] [2021-11-13 18:26:01,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389761752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:01,988 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:01,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:26:01,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203427335] [2021-11-13 18:26:01,990 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:01,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:26:01,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:26:02,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:26:02,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:26:02,042 INFO L87 Difference]: Start difference. First operand has 1579 states, 1153 states have (on average 1.4388551604509974) internal successors, (1659), 1182 states have internal predecessors, (1659), 348 states have call successors, (348), 77 states have call predecessors, (348), 76 states have return successors, (343), 341 states have call predecessors, (343), 343 states have call successors, (343) Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:26:04,526 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:26:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:09,271 INFO L93 Difference]: Finished difference Result 5906 states and 9264 transitions. [2021-11-13 18:26:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:26:09,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-11-13 18:26:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:09,336 INFO L225 Difference]: With dead ends: 5906 [2021-11-13 18:26:09,336 INFO L226 Difference]: Without dead ends: 4308 [2021-11-13 18:26:09,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:26:09,372 INFO L933 BasicCegarLoop]: 2856 mSDtfsCounter, 4260 mSDsluCounter, 5768 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6207.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 8624 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.69ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6757.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:09,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4260 Valid, 8624 Invalid, 659 Unknown, 0 Unchecked, 53.69ms Time], IncrementalHoareTripleChecker [7 Valid, 651 Invalid, 1 Unknown, 0 Unchecked, 6757.36ms Time] [2021-11-13 18:26:09,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2021-11-13 18:26:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 4302. [2021-11-13 18:26:09,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4302 states, 3140 states have (on average 1.4318471337579617) internal successors, (4496), 3195 states have internal predecessors, (4496), 949 states have call successors, (949), 213 states have call predecessors, (949), 212 states have return successors, (944), 938 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-13 18:26:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6389 transitions. [2021-11-13 18:26:09,685 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6389 transitions. Word has length 43 [2021-11-13 18:26:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:09,686 INFO L470 AbstractCegarLoop]: Abstraction has 4302 states and 6389 transitions. [2021-11-13 18:26:09,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:26:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6389 transitions. [2021-11-13 18:26:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 18:26:09,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:09,701 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:09,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:26:09,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:26:09,917 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:09,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:09,918 INFO L85 PathProgramCache]: Analyzing trace with hash 781075070, now seen corresponding path program 1 times [2021-11-13 18:26:09,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:26:09,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797694056] [2021-11-13 18:26:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:09,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:26:09,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:26:09,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:26:09,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:26:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:20,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 2449 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:26:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:26:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:26:20,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:26:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:26:21,039 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:26:21,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797694056] [2021-11-13 18:26:21,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797694056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:21,040 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:21,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 4 [2021-11-13 18:26:21,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093135496] [2021-11-13 18:26:21,041 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:21,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:26:21,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:26:21,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:26:21,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:26:21,044 INFO L87 Difference]: Start difference. First operand 4302 states and 6389 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:26:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:22,442 INFO L93 Difference]: Finished difference Result 8973 states and 13407 transitions. [2021-11-13 18:26:22,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:26:22,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 66 [2021-11-13 18:26:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:22,493 INFO L225 Difference]: With dead ends: 8973 [2021-11-13 18:26:22,493 INFO L226 Difference]: Without dead ends: 4691 [2021-11-13 18:26:22,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:26:22,525 INFO L933 BasicCegarLoop]: 2702 mSDtfsCounter, 2842 mSDsluCounter, 2242 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 973.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2842 SdHoareTripleChecker+Valid, 4944 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.50ms SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1069.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:22,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2842 Valid, 4944 Invalid, 282 Unknown, 0 Unchecked, 22.50ms Time], IncrementalHoareTripleChecker [151 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 1069.28ms Time] [2021-11-13 18:26:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-11-13 18:26:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4302. [2021-11-13 18:26:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4302 states, 3140 states have (on average 1.4315286624203822) internal successors, (4495), 3195 states have internal predecessors, (4495), 949 states have call successors, (949), 213 states have call predecessors, (949), 212 states have return successors, (944), 938 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-13 18:26:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6388 transitions. [2021-11-13 18:26:22,788 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6388 transitions. Word has length 66 [2021-11-13 18:26:22,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:22,789 INFO L470 AbstractCegarLoop]: Abstraction has 4302 states and 6388 transitions. [2021-11-13 18:26:22,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:26:22,789 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6388 transitions. [2021-11-13 18:26:22,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 18:26:22,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:22,798 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:22,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:26:22,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:26:22,999 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:23,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:23,000 INFO L85 PathProgramCache]: Analyzing trace with hash 921623680, now seen corresponding path program 1 times [2021-11-13 18:26:23,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:26:23,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050531927] [2021-11-13 18:26:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:23,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:26:23,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:26:23,011 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:26:23,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:26:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:32,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 2449 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:26:32,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:26:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:26:33,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:26:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:26:33,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:26:33,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050531927] [2021-11-13 18:26:33,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050531927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:33,883 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:33,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 4 [2021-11-13 18:26:33,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426005542] [2021-11-13 18:26:33,884 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:33,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:26:33,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:26:33,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:26:33,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:26:33,885 INFO L87 Difference]: Start difference. First operand 4302 states and 6388 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:26:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:35,175 INFO L93 Difference]: Finished difference Result 8973 states and 13405 transitions. [2021-11-13 18:26:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:26:35,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 66 [2021-11-13 18:26:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:35,220 INFO L225 Difference]: With dead ends: 8973 [2021-11-13 18:26:35,220 INFO L226 Difference]: Without dead ends: 4691 [2021-11-13 18:26:35,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:26:35,251 INFO L933 BasicCegarLoop]: 2702 mSDtfsCounter, 2831 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 917.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2831 SdHoareTripleChecker+Valid, 4949 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.95ms SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1003.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:35,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2831 Valid, 4949 Invalid, 282 Unknown, 0 Unchecked, 20.95ms Time], IncrementalHoareTripleChecker [151 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 1003.35ms Time] [2021-11-13 18:26:35,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-11-13 18:26:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4302. [2021-11-13 18:26:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4302 states, 3140 states have (on average 1.4312101910828026) internal successors, (4494), 3195 states have internal predecessors, (4494), 949 states have call successors, (949), 213 states have call predecessors, (949), 212 states have return successors, (944), 938 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-13 18:26:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6387 transitions. [2021-11-13 18:26:35,506 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6387 transitions. Word has length 66 [2021-11-13 18:26:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:35,508 INFO L470 AbstractCegarLoop]: Abstraction has 4302 states and 6387 transitions. [2021-11-13 18:26:35,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:26:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6387 transitions. [2021-11-13 18:26:35,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 18:26:35,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:35,518 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:35,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:26:35,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:26:35,734 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:35,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:35,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1140478398, now seen corresponding path program 1 times [2021-11-13 18:26:35,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:26:35,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485330336] [2021-11-13 18:26:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:35,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:26:35,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:26:35,741 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:26:35,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:26:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:45,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 2449 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:26:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:26:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:26:45,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:26:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:26:46,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:26:46,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485330336] [2021-11-13 18:26:46,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485330336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:46,277 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:46,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 18:26:46,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101345303] [2021-11-13 18:26:46,278 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:46,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:26:46,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:26:46,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:26:46,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:26:46,280 INFO L87 Difference]: Start difference. First operand 4302 states and 6387 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:26:47,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:47,947 INFO L93 Difference]: Finished difference Result 12239 states and 18880 transitions. [2021-11-13 18:26:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:26:47,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2021-11-13 18:26:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:48,038 INFO L225 Difference]: With dead ends: 12239 [2021-11-13 18:26:48,038 INFO L226 Difference]: Without dead ends: 7957 [2021-11-13 18:26:48,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:26:48,075 INFO L933 BasicCegarLoop]: 3832 mSDtfsCounter, 2378 mSDsluCounter, 20683 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 942.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2499 SdHoareTripleChecker+Valid, 24515 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.18ms SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1077.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:48,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2499 Valid, 24515 Invalid, 679 Unknown, 0 Unchecked, 56.18ms Time], IncrementalHoareTripleChecker [610 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 1077.29ms Time] [2021-11-13 18:26:48,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7957 states. [2021-11-13 18:26:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7957 to 4307. [2021-11-13 18:26:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4307 states, 3144 states have (on average 1.4306615776081424) internal successors, (4498), 3199 states have internal predecessors, (4498), 949 states have call successors, (949), 213 states have call predecessors, (949), 213 states have return successors, (946), 939 states have call predecessors, (946), 944 states have call successors, (946) [2021-11-13 18:26:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 6393 transitions. [2021-11-13 18:26:48,575 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 6393 transitions. Word has length 66 [2021-11-13 18:26:48,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:48,575 INFO L470 AbstractCegarLoop]: Abstraction has 4307 states and 6393 transitions. [2021-11-13 18:26:48,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:26:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 6393 transitions. [2021-11-13 18:26:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 18:26:48,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:48,583 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:48,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:26:48,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:26:48,807 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:48,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:48,807 INFO L85 PathProgramCache]: Analyzing trace with hash 553672384, now seen corresponding path program 1 times [2021-11-13 18:26:48,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:26:48,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271643124] [2021-11-13 18:26:48,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:48,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:26:48,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:26:48,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:26:48,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1bcc5a-4fb6-4445-a59f-ff31f4ac0037/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:26:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:58,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 2448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:26:58,701 INFO L286 TraceCheckSpWp]: Computing forward predicates...