./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--isdn--mISDN--l1oip.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--isdn--mISDN--l1oip.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ --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 cdd2a82876306722c6f2c03d8d80569e829e4de5a69933d8bd8efaa1bf02dd84 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:24:25,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:24:25,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:24:25,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:24:25,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:24:25,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:24:25,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:24:25,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:24:25,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:24:25,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:24:25,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:24:25,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:24:25,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:24:25,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:24:25,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:24:25,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:24:25,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:24:25,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:24:25,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:24:25,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:24:25,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:24:25,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:24:25,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:24:25,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:24:25,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:24:25,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:24:25,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:24:25,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:24:25,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:24:25,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:24:25,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:24:25,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:24:25,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:24:25,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:24:25,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:24:25,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:24:25,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:24:25,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:24:25,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:24:25,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:24:25,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:24:25,676 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-10-17 10:24:25,721 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:24:25,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:24:25,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:24:25,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:24:25,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:24:25,723 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:24:25,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:24:25,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:24:25,724 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:24:25,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:24:25,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:24:25,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:24:25,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:24:25,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:24:25,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:24:25,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:24:25,727 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:24:25,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:24:25,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:24:25,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:24:25,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:24:25,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:24:25,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:24:25,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:24:25,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:24:25,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:24:25,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:24:25,730 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:24:25,731 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:24:25,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:24:25,731 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_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdd2a82876306722c6f2c03d8d80569e829e4de5a69933d8bd8efaa1bf02dd84 [2022-10-17 10:24:26,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:24:26,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:24:26,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:24:26,102 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:24:26,103 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:24:26,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--isdn--mISDN--l1oip.ko-main.cil.out.i [2022-10-17 10:24:26,181 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/data/fc2f12eab/d110d20eb4ff4516b07da613fe1da100/FLAG7df2dbfaa [2022-10-17 10:24:27,017 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:24:27,019 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--isdn--mISDN--l1oip.ko-main.cil.out.i [2022-10-17 10:24:27,068 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/data/fc2f12eab/d110d20eb4ff4516b07da613fe1da100/FLAG7df2dbfaa [2022-10-17 10:24:27,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/data/fc2f12eab/d110d20eb4ff4516b07da613fe1da100 [2022-10-17 10:24:27,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:24:27,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:24:27,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:24:27,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:24:27,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:24:27,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:24:27" (1/1) ... [2022-10-17 10:24:27,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2721e89b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:27, skipping insertion in model container [2022-10-17 10:24:27,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:24:27" (1/1) ... [2022-10-17 10:24:27,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:24:27,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:24:29,370 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--isdn--mISDN--l1oip.ko-main.cil.out.i[220631,220644] [2022-10-17 10:24:29,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:24:29,581 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:24:29,961 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--isdn--mISDN--l1oip.ko-main.cil.out.i[220631,220644] [2022-10-17 10:24:29,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:24:30,114 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:24:30,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30 WrapperNode [2022-10-17 10:24:30,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:24:30,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:24:30,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:24:30,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:24:30,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30" (1/1) ... [2022-10-17 10:24:30,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30" (1/1) ... [2022-10-17 10:24:30,436 INFO L138 Inliner]: procedures = 181, calls = 2117, calls flagged for inlining = 61, calls inlined = 40, statements flattened = 2945 [2022-10-17 10:24:30,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:24:30,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:24:30,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:24:30,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:24:30,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30" (1/1) ... [2022-10-17 10:24:30,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30" (1/1) ... [2022-10-17 10:24:30,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30" (1/1) ... [2022-10-17 10:24:30,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30" (1/1) ... [2022-10-17 10:24:30,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30" (1/1) ... [2022-10-17 10:24:30,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30" (1/1) ... [2022-10-17 10:24:30,740 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30" (1/1) ... [2022-10-17 10:24:30,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30" (1/1) ... [2022-10-17 10:24:30,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:24:30,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:24:30,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:24:30,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:24:30,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30" (1/1) ... [2022-10-17 10:24:30,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:24:30,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:30,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:24:30,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b449d4f5-a75d-4a59-aa3f-207dc2206406/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:24:30,899 INFO L130 BoogieDeclarations]: Found specification of procedure sock_release [2022-10-17 10:24:30,899 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_release [2022-10-17 10:24:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-10-17 10:24:30,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-10-17 10:24:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-17 10:24:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-17 10:24:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 10:24:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:24:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure vzalloc [2022-10-17 10:24:30,901 INFO L138 BoogieDeclarations]: Found implementation of procedure vzalloc [2022-10-17 10:24:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-10-17 10:24:30,901 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-10-17 10:24:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 10:24:30,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 10:24:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-10-17 10:24:30,902 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-10-17 10:24:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2022-10-17 10:24:30,902 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2022-10-17 10:24:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure l1oip_ulaw_to_alaw [2022-10-17 10:24:30,902 INFO L138 BoogieDeclarations]: Found implementation of procedure l1oip_ulaw_to_alaw [2022-10-17 10:24:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-10-17 10:24:30,902 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-10-17 10:24:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2022-10-17 10:24:30,903 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2022-10-17 10:24:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2022-10-17 10:24:30,903 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2022-10-17 10:24:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:24:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 10:24:30,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 10:24:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure l1oip_socket_send [2022-10-17 10:24:30,904 INFO L138 BoogieDeclarations]: Found implementation of procedure l1oip_socket_send [2022-10-17 10:24:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-10-17 10:24:30,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-10-17 10:24:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2022-10-17 10:24:30,904 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2022-10-17 10:24:30,905 INFO L130 BoogieDeclarations]: Found specification of procedure timer_pending [2022-10-17 10:24:30,905 INFO L138 BoogieDeclarations]: Found implementation of procedure timer_pending [2022-10-17 10:24:30,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:24:30,905 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-10-17 10:24:30,906 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-10-17 10:24:30,906 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-10-17 10:24:30,906 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-10-17 10:24:30,906 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-10-17 10:24:30,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-10-17 10:24:30,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:24:30,907 INFO L130 BoogieDeclarations]: Found specification of procedure l1oip_socket_open [2022-10-17 10:24:30,907 INFO L138 BoogieDeclarations]: Found implementation of procedure l1oip_socket_open [2022-10-17 10:24:30,907 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-10-17 10:24:30,907 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-10-17 10:24:30,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:24:30,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:24:30,908 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-10-17 10:24:30,908 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-10-17 10:24:30,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:24:30,909 INFO L130 BoogieDeclarations]: Found specification of procedure l1oip_4bit_free [2022-10-17 10:24:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure l1oip_4bit_free [2022-10-17 10:24:30,909 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-10-17 10:24:30,910 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-10-17 10:24:30,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:24:30,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 10:24:30,911 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2022-10-17 10:24:30,912 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2022-10-17 10:24:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure mI_alloc_skb [2022-10-17 10:24:30,912 INFO L138 BoogieDeclarations]: Found implementation of procedure mI_alloc_skb [2022-10-17 10:24:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure queue_ch_frame [2022-10-17 10:24:30,912 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_ch_frame [2022-10-17 10:24:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-10-17 10:24:30,912 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-10-17 10:24:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure _queue_data [2022-10-17 10:24:30,913 INFO L138 BoogieDeclarations]: Found implementation of procedure _queue_data [2022-10-17 10:24:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-10-17 10:24:30,913 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-10-17 10:24:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-10-17 10:24:30,913 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-10-17 10:24:30,914 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-10-17 10:24:30,914 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-10-17 10:24:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure l1oip_alaw_to_ulaw [2022-10-17 10:24:30,915 INFO L138 BoogieDeclarations]: Found implementation of procedure l1oip_alaw_to_ulaw [2022-10-17 10:24:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure l1oip_socket_close [2022-10-17 10:24:30,915 INFO L138 BoogieDeclarations]: Found implementation of procedure l1oip_socket_close [2022-10-17 10:24:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-10-17 10:24:30,915 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-10-17 10:24:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:24:30,916 INFO L130 BoogieDeclarations]: Found specification of procedure memchr_inv [2022-10-17 10:24:30,916 INFO L138 BoogieDeclarations]: Found implementation of procedure memchr_inv [2022-10-17 10:24:30,916 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2022-10-17 10:24:30,916 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2022-10-17 10:24:30,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-17 10:24:30,917 INFO L130 BoogieDeclarations]: Found specification of procedure l1oip_cleanup [2022-10-17 10:24:30,917 INFO L138 BoogieDeclarations]: Found implementation of procedure l1oip_cleanup [2022-10-17 10:24:30,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:24:30,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:24:30,918 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-10-17 10:24:30,918 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-10-17 10:24:31,431 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:24:31,448 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:24:35,638 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:24:35,658 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:24:35,659 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 10:24:35,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:24:35 BoogieIcfgContainer [2022-10-17 10:24:35,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:24:35,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:24:35,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:24:35,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:24:35,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:24:27" (1/3) ... [2022-10-17 10:24:35,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2f0617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:24:35, skipping insertion in model container [2022-10-17 10:24:35,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:30" (2/3) ... [2022-10-17 10:24:35,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2f0617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:24:35, skipping insertion in model container [2022-10-17 10:24:35,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:24:35" (3/3) ... [2022-10-17 10:24:35,679 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--isdn--mISDN--l1oip.ko-main.cil.out.i [2022-10-17 10:24:35,698 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:24:35,698 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:24:35,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:24:35,803 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28224aba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:24:35,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:24:35,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 551 states, 414 states have (on average 1.3502415458937198) internal successors, (559), 426 states have internal predecessors, (559), 96 states have call successors, (96), 39 states have call predecessors, (96), 39 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2022-10-17 10:24:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 10:24:35,825 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:35,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:35,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:35,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2058284382, now seen corresponding path program 1 times [2022-10-17 10:24:35,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:35,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656439228] [2022-10-17 10:24:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:35,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:36,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:24:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:36,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:24:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:36,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:36,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656439228] [2022-10-17 10:24:36,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656439228] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:36,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:36,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:24:36,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651080905] [2022-10-17 10:24:36,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:36,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:24:36,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:24:36,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:24:36,953 INFO L87 Difference]: Start difference. First operand has 551 states, 414 states have (on average 1.3502415458937198) internal successors, (559), 426 states have internal predecessors, (559), 96 states have call successors, (96), 39 states have call predecessors, (96), 39 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:24:40,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:40,873 INFO L93 Difference]: Finished difference Result 1761 states and 2508 transitions. [2022-10-17 10:24:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:24:40,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-10-17 10:24:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:40,909 INFO L225 Difference]: With dead ends: 1761 [2022-10-17 10:24:40,909 INFO L226 Difference]: Without dead ends: 1209 [2022-10-17 10:24:40,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:24:40,930 INFO L413 NwaCegarLoop]: 987 mSDtfsCounter, 1426 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:40,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1536 Valid, 1316 Invalid, 2149 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [717 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-10-17 10:24:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-10-17 10:24:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 876. [2022-10-17 10:24:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 655 states have (on average 1.3404580152671757) internal successors, (878), 673 states have internal predecessors, (878), 156 states have call successors, (156), 65 states have call predecessors, (156), 64 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-10-17 10:24:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1187 transitions. [2022-10-17 10:24:41,171 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1187 transitions. Word has length 24 [2022-10-17 10:24:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:41,172 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 1187 transitions. [2022-10-17 10:24:41,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:24:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1187 transitions. [2022-10-17 10:24:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-17 10:24:41,175 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:41,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:41,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:24:41,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:41,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:41,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1415787569, now seen corresponding path program 1 times [2022-10-17 10:24:41,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:41,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736188980] [2022-10-17 10:24:41,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:41,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:41,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:24:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:41,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:24:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:41,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:24:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:41,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:41,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736188980] [2022-10-17 10:24:41,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736188980] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:41,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:41,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:24:41,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039403933] [2022-10-17 10:24:41,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:41,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:24:41,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:41,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:24:41,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:24:41,735 INFO L87 Difference]: Start difference. First operand 876 states and 1187 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:24:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:43,281 INFO L93 Difference]: Finished difference Result 2248 states and 3147 transitions. [2022-10-17 10:24:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:24:43,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-10-17 10:24:43,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:43,300 INFO L225 Difference]: With dead ends: 2248 [2022-10-17 10:24:43,301 INFO L226 Difference]: Without dead ends: 1375 [2022-10-17 10:24:43,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:24:43,306 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 743 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:43,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 2122 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-10-17 10:24:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-10-17 10:24:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 878. [2022-10-17 10:24:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 657 states have (on average 1.339421613394216) internal successors, (880), 675 states have internal predecessors, (880), 156 states have call successors, (156), 65 states have call predecessors, (156), 64 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-10-17 10:24:43,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1189 transitions. [2022-10-17 10:24:43,446 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1189 transitions. Word has length 33 [2022-10-17 10:24:43,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:43,447 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 1189 transitions. [2022-10-17 10:24:43,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:24:43,447 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1189 transitions. [2022-10-17 10:24:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 10:24:43,449 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:43,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:43,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:24:43,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:43,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:43,450 INFO L85 PathProgramCache]: Analyzing trace with hash 84515848, now seen corresponding path program 1 times [2022-10-17 10:24:43,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:43,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906942755] [2022-10-17 10:24:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:43,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:43,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:24:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:43,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:24:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:43,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:24:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:43,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:43,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906942755] [2022-10-17 10:24:43,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906942755] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:43,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:43,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:24:43,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487186671] [2022-10-17 10:24:43,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:43,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:24:43,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:43,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:24:44,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:24:44,001 INFO L87 Difference]: Start difference. First operand 878 states and 1189 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:24:45,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:45,512 INFO L93 Difference]: Finished difference Result 2100 states and 2907 transitions. [2022-10-17 10:24:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:24:45,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-10-17 10:24:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:45,522 INFO L225 Difference]: With dead ends: 2100 [2022-10-17 10:24:45,522 INFO L226 Difference]: Without dead ends: 1225 [2022-10-17 10:24:45,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:24:45,527 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 1063 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:45,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 1671 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-17 10:24:45,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-10-17 10:24:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 880. [2022-10-17 10:24:45,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 659 states have (on average 1.3368740515933233) internal successors, (881), 677 states have internal predecessors, (881), 156 states have call successors, (156), 65 states have call predecessors, (156), 64 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-10-17 10:24:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1190 transitions. [2022-10-17 10:24:45,628 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1190 transitions. Word has length 37 [2022-10-17 10:24:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:45,629 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1190 transitions. [2022-10-17 10:24:45,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:24:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1190 transitions. [2022-10-17 10:24:45,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-10-17 10:24:45,633 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:45,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:45,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:24:45,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:45,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:45,634 INFO L85 PathProgramCache]: Analyzing trace with hash -170586620, now seen corresponding path program 1 times [2022-10-17 10:24:45,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:45,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840643240] [2022-10-17 10:24:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:45,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:45,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:24:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:45,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:24:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:45,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:24:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:46,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-10-17 10:24:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:46,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:24:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:46,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:46,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840643240] [2022-10-17 10:24:46,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840643240] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:46,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:46,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:24:46,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563652285] [2022-10-17 10:24:46,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:46,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:24:46,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:46,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:24:46,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:24:46,038 INFO L87 Difference]: Start difference. First operand 880 states and 1190 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:24:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:48,702 INFO L93 Difference]: Finished difference Result 1502 states and 2168 transitions. [2022-10-17 10:24:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:24:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-10-17 10:24:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:48,715 INFO L225 Difference]: With dead ends: 1502 [2022-10-17 10:24:48,715 INFO L226 Difference]: Without dead ends: 1499 [2022-10-17 10:24:48,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:24:48,718 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 1657 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 839 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:48,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1681 Valid, 1038 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [839 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-10-17 10:24:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2022-10-17 10:24:48,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 879. [2022-10-17 10:24:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 659 states have (on average 1.3353566009104705) internal successors, (880), 676 states have internal predecessors, (880), 155 states have call successors, (155), 65 states have call predecessors, (155), 64 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-10-17 10:24:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1188 transitions. [2022-10-17 10:24:48,840 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1188 transitions. Word has length 54 [2022-10-17 10:24:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:48,841 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1188 transitions. [2022-10-17 10:24:48,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:24:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1188 transitions. [2022-10-17 10:24:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-10-17 10:24:48,844 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:48,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:48,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:24:48,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:48,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:48,846 INFO L85 PathProgramCache]: Analyzing trace with hash -993434369, now seen corresponding path program 1 times [2022-10-17 10:24:48,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:48,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997052914] [2022-10-17 10:24:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:48,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:49,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:24:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:49,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:24:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:49,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:24:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:49,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-10-17 10:24:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:49,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:24:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:49,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:49,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997052914] [2022-10-17 10:24:49,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997052914] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:49,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:49,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:24:49,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590414897] [2022-10-17 10:24:49,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:49,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:24:49,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:24:49,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:24:49,273 INFO L87 Difference]: Start difference. First operand 879 states and 1188 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:24:51,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:51,702 INFO L93 Difference]: Finished difference Result 1501 states and 2166 transitions. [2022-10-17 10:24:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:24:51,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-10-17 10:24:51,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:51,714 INFO L225 Difference]: With dead ends: 1501 [2022-10-17 10:24:51,715 INFO L226 Difference]: Without dead ends: 1498 [2022-10-17 10:24:51,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:24:51,719 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 1649 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1671 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:51,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1671 Valid, 1043 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-10-17 10:24:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-10-17 10:24:51,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 878. [2022-10-17 10:24:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 659 states have (on average 1.3338391502276177) internal successors, (879), 675 states have internal predecessors, (879), 154 states have call successors, (154), 65 states have call predecessors, (154), 64 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-10-17 10:24:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1186 transitions. [2022-10-17 10:24:51,855 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1186 transitions. Word has length 55 [2022-10-17 10:24:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:51,856 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 1186 transitions. [2022-10-17 10:24:51,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:24:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1186 transitions. [2022-10-17 10:24:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-10-17 10:24:51,859 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:51,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:51,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:24:51,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:51,861 INFO L85 PathProgramCache]: Analyzing trace with hash -731905945, now seen corresponding path program 1 times [2022-10-17 10:24:51,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:51,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129038920] [2022-10-17 10:24:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:51,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:52,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:24:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:52,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:24:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:52,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:24:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:52,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-10-17 10:24:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:52,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:24:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:52,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129038920] [2022-10-17 10:24:52,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129038920] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:52,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:52,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:24:52,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508228889] [2022-10-17 10:24:52,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:52,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:24:52,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:52,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:24:52,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:24:52,296 INFO L87 Difference]: Start difference. First operand 878 states and 1186 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)