./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:01:11,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:01:11,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:01:11,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:01:11,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:01:11,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:01:11,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:01:11,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:01:11,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:01:11,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:01:11,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:01:11,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:01:11,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:01:11,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:01:11,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:01:11,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:01:11,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:01:11,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:01:11,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:01:11,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:01:11,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:01:11,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:01:11,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:01:11,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:01:11,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:01:11,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:01:11,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:01:11,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:01:11,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:01:11,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:01:11,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:01:11,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:01:11,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:01:11,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:01:11,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:01:11,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:01:11,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:01:11,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:01:11,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:01:11,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:01:11,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:01:11,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 15:01:11,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:01:11,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:01:11,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:01:11,505 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:01:11,505 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:01:11,505 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:01:11,506 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:01:11,506 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:01:11,506 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:01:11,506 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:01:11,508 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:01:11,508 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:01:11,508 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:01:11,509 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:01:11,509 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:01:11,509 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:01:11,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:01:11,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:01:11,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:01:11,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:01:11,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:01:11,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:01:11,513 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:01:11,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:01:11,513 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:01:11,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:01:11,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:01:11,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:01:11,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:01:11,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:01:11,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:01:11,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:01:11,518 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:01:11,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:01:11,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:01:11,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:01:11,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:01:11,519 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d [2021-11-19 15:01:11,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:01:11,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:01:11,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:01:11,869 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:01:11,870 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:01:11,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 15:01:11,968 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/data/547acd4ae/bbb8265f8574441691e135046a72b10d/FLAG478e080c6 [2021-11-19 15:01:12,953 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:01:12,955 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 15:01:13,011 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/data/547acd4ae/bbb8265f8574441691e135046a72b10d/FLAG478e080c6 [2021-11-19 15:01:13,317 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/data/547acd4ae/bbb8265f8574441691e135046a72b10d [2021-11-19 15:01:13,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:01:13,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:01:13,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:13,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:01:13,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:01:13,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:13" (1/1) ... [2021-11-19 15:01:13,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a211027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:13, skipping insertion in model container [2021-11-19 15:01:13,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:13" (1/1) ... [2021-11-19 15:01:13,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:01:13,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:01:14,864 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_ade167e8-7cd8-46c9-9dda-f2fb98666e63/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2021-11-19 15:01:15,001 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:01:15,014 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:01:15,021 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:01:15,106 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:01:15,145 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:01:15,155 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:01:15,162 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:01:15,509 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:15,596 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 15:01:15,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@23bf80a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:15, skipping insertion in model container [2021-11-19 15:01:15,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:15,597 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:01:15,600 INFO L158 Benchmark]: Toolchain (without parser) took 2276.92ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 60.0MB in the beginning and 57.5MB in the end (delta: 2.5MB). Peak memory consumption was 31.3MB. Max. memory is 16.1GB. [2021-11-19 15:01:15,601 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 102.8MB. Free memory is still 55.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:01:15,602 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2273.52ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 59.8MB in the beginning and 57.5MB in the end (delta: 2.3MB). Peak memory consumption was 31.3MB. Max. memory is 16.1GB. [2021-11-19 15:01:15,604 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 102.8MB. Free memory is still 55.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2273.52ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 59.8MB in the beginning and 57.5MB in the end (delta: 2.3MB). Peak memory consumption was 31.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4117]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. 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_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:01:18,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:01:18,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:01:18,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:01:18,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:01:18,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:01:18,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:01:18,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:01:18,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:01:18,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:01:18,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:01:18,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:01:18,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:01:18,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:01:18,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:01:18,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:01:18,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:01:18,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:01:18,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:01:18,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:01:18,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:01:18,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:01:18,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:01:18,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:01:18,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:01:18,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:01:18,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:01:18,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:01:18,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:01:18,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:01:18,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:01:18,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:01:18,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:01:18,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:01:18,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:01:18,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:01:18,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:01:18,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:01:18,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:01:18,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:01:18,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:01:18,265 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 15:01:18,292 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:01:18,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:01:18,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:01:18,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:01:18,296 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:01:18,296 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:01:18,296 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:01:18,296 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:01:18,297 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:01:18,297 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:01:18,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:01:18,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:01:18,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:01:18,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:01:18,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:01:18,301 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:01:18,301 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:01:18,301 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:01:18,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:01:18,302 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:01:18,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:01:18,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:01:18,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:01:18,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:01:18,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:01:18,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:01:18,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:01:18,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:01:18,304 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:01:18,304 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:18,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:01:18,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:01:18,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:01:18,305 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_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d [2021-11-19 15:01:18,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:01:18,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:01:18,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:01:18,798 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:01:18,799 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:01:18,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 15:01:18,879 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/data/c61161bc1/bba3e8e4da0145a28ce85348b99103cf/FLAGa9c9e7807 [2021-11-19 15:01:19,873 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:01:19,873 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 15:01:19,915 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/data/c61161bc1/bba3e8e4da0145a28ce85348b99103cf/FLAGa9c9e7807 [2021-11-19 15:01:20,286 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/data/c61161bc1/bba3e8e4da0145a28ce85348b99103cf [2021-11-19 15:01:20,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:01:20,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:01:20,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:20,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:01:20,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:01:20,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:20" (1/1) ... [2021-11-19 15:01:20,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b2082fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:20, skipping insertion in model container [2021-11-19 15:01:20,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:20" (1/1) ... [2021-11-19 15:01:20,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:01:20,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:01:21,799 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_ade167e8-7cd8-46c9-9dda-f2fb98666e63/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2021-11-19 15:01:22,508 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:22,634 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:01:22,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:01:22,910 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_ade167e8-7cd8-46c9-9dda-f2fb98666e63/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2021-11-19 15:01:23,200 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:23,295 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:01:23,434 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_ade167e8-7cd8-46c9-9dda-f2fb98666e63/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2021-11-19 15:01:23,807 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:24,090 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:01:24,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:24 WrapperNode [2021-11-19 15:01:24,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:24,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:01:24,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:01:24,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:01:24,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:24" (1/1) ... [2021-11-19 15:01:24,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:24" (1/1) ... [2021-11-19 15:01:24,489 INFO L137 Inliner]: procedures = 260, calls = 3306, calls flagged for inlining = 118, calls inlined = 118, statements flattened = 6250 [2021-11-19 15:01:24,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:01:24,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:01:24,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:01:24,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:01:24,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:24" (1/1) ... [2021-11-19 15:01:24,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:24" (1/1) ... [2021-11-19 15:01:24,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:24" (1/1) ... [2021-11-19 15:01:24,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:24" (1/1) ... [2021-11-19 15:01:24,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:24" (1/1) ... [2021-11-19 15:01:24,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:24" (1/1) ... [2021-11-19 15:01:24,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:24" (1/1) ... [2021-11-19 15:01:25,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:01:25,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:01:25,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:01:25,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:01:25,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:24" (1/1) ... [2021-11-19 15:01:25,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:01:25,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:01:25,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:01:25,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:01:25,130 INFO L130 BoogieDeclarations]: Found specification of procedure acm_disconnect [2021-11-19 15:01:25,130 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_disconnect [2021-11-19 15:01:25,130 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_hangup [2021-11-19 15:01:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_hangup [2021-11-19 15:01:25,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 15:01:25,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 15:01:25,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 15:01:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_18 [2021-11-19 15:01:25,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_18 [2021-11-19 15:01:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 15:01:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 15:01:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 15:01:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 15:01:25,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 15:01:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_destruct [2021-11-19 15:01:25,133 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_destruct [2021-11-19 15:01:25,134 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-19 15:01:25,134 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-19 15:01:25,134 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-19 15:01:25,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-19 15:01:25,135 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_22 [2021-11-19 15:01:25,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_22 [2021-11-19 15:01:25,135 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_cleanup [2021-11-19 15:01:25,135 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_cleanup [2021-11-19 15:01:25,135 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 15:01:25,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 15:01:25,136 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-19 15:01:25,136 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-19 15:01:25,136 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-11-19 15:01:25,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-11-19 15:01:25,137 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_buffers_free [2021-11-19 15:01:25,137 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_buffers_free [2021-11-19 15:01:25,138 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-19 15:01:25,138 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-19 15:01:25,138 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-19 15:01:25,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-19 15:01:25,139 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-19 15:01:25,139 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-19 15:01:25,139 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-19 15:01:25,139 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-19 15:01:25,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 15:01:25,140 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 15:01:25,140 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 15:01:25,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 15:01:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-19 15:01:25,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-19 15:01:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-19 15:01:25,142 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-19 15:01:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_put [2021-11-19 15:01:25,142 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_put [2021-11-19 15:01:25,143 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_chars_in_buffer [2021-11-19 15:01:25,144 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_chars_in_buffer [2021-11-19 15:01:25,145 INFO L130 BoogieDeclarations]: Found specification of procedure acm_resume [2021-11-19 15:01:25,145 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_resume [2021-11-19 15:01:25,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:01:25,146 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 15:01:25,146 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_msg [2021-11-19 15:01:25,147 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_msg [2021-11-19 15:01:25,147 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-19 15:01:25,148 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-19 15:01:25,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 15:01:25,149 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_hangup [2021-11-19 15:01:25,149 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_hangup [2021-11-19 15:01:25,149 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2021-11-19 15:01:25,150 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2021-11-19 15:01:25,150 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-19 15:01:25,150 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-19 15:01:25,150 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-19 15:01:25,150 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_interface [2021-11-19 15:01:25,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_interface [2021-11-19 15:01:25,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 15:01:25,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 15:01:25,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 15:01:25,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:01:25,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 15:01:25,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 15:01:25,154 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-19 15:01:25,272 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-19 15:01:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-19 15:01:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:01:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 15:01:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 15:01:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-19 15:01:25,272 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-19 15:01:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-19 15:01:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-19 15:01:25,273 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-19 15:01:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-19 15:01:25,273 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-19 15:01:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-19 15:01:25,273 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmget [2021-11-19 15:01:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmget [2021-11-19 15:01:25,273 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_shutdown [2021-11-19 15:01:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_shutdown [2021-11-19 15:01:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_interface [2021-11-19 15:01:25,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_interface [2021-11-19 15:01:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_set_termios [2021-11-19 15:01:25,274 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_set_termios [2021-11-19 15:01:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-19 15:01:25,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-19 15:01:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-19 15:01:25,274 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-19 15:01:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_break_ctl [2021-11-19 15:01:25,275 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_break_ctl [2021-11-19 15:01:25,275 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-19 15:01:25,275 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-19 15:01:25,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_7 [2021-11-19 15:01:25,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_7 [2021-11-19 15:01:25,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_6 [2021-11-19 15:01:25,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_6 [2021-11-19 15:01:25,275 INFO L130 BoogieDeclarations]: Found specification of procedure usb_mark_last_busy [2021-11-19 15:01:25,275 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_mark_last_busy [2021-11-19 15:01:25,276 INFO L130 BoogieDeclarations]: Found specification of procedure acm_start_wb [2021-11-19 15:01:25,276 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_start_wb [2021-11-19 15:01:25,276 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-19 15:01:25,276 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-19 15:01:25,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 15:01:25,276 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 15:01:25,276 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-19 15:01:25,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-19 15:01:25,276 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_throttle [2021-11-19 15:01:25,277 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_throttle [2021-11-19 15:01:25,277 INFO L130 BoogieDeclarations]: Found specification of procedure acm_wb_is_avail [2021-11-19 15:01:25,277 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_wb_is_avail [2021-11-19 15:01:25,277 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-19 15:01:25,277 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-19 15:01:25,277 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-19 15:01:25,277 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-19 15:01:25,277 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_write_room [2021-11-19 15:01:25,277 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_write_room [2021-11-19 15:01:25,278 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urb [2021-11-19 15:01:25,278 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urb [2021-11-19 15:01:25,278 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 15:01:25,278 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 15:01:25,278 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_done [2021-11-19 15:01:25,278 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_done [2021-11-19 15:01:25,278 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_ioctl [2021-11-19 15:01:25,278 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_ioctl [2021-11-19 15:01:25,278 INFO L130 BoogieDeclarations]: Found specification of procedure acm_release_minor [2021-11-19 15:01:25,279 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_release_minor [2021-11-19 15:01:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 15:01:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 15:01:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 15:01:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 15:01:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-19 15:01:25,279 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-19 15:01:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 15:01:25,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 15:01:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2021-11-19 15:01:25,280 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2021-11-19 15:01:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_unthrottle [2021-11-19 15:01:25,280 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_unthrottle [2021-11-19 15:01:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:01:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_3 [2021-11-19 15:01:25,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_3 [2021-11-19 15:01:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:01:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-19 15:01:25,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-19 15:01:25,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 15:01:25,281 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_int_urb_17 [2021-11-19 15:01:25,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_int_urb_17 [2021-11-19 15:01:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 15:01:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 15:01:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 15:01:25,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 15:01:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 15:01:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-19 15:01:25,286 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-19 15:01:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-11-19 15:01:25,286 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-11-19 15:01:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_buffers_free [2021-11-19 15:01:25,286 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_buffers_free [2021-11-19 15:01:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_irq [2021-11-19 15:01:25,287 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_irq [2021-11-19 15:01:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urbs [2021-11-19 15:01:25,287 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urbs [2021-11-19 15:01:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_install [2021-11-19 15:01:25,288 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_install [2021-11-19 15:01:25,288 INFO L130 BoogieDeclarations]: Found specification of procedure stop_data_traffic [2021-11-19 15:01:25,288 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_data_traffic [2021-11-19 15:01:25,288 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-19 15:01:25,289 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-19 15:01:25,289 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-11-19 15:01:25,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-11-19 15:01:25,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 15:01:25,290 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-19 15:01:25,292 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-19 15:01:25,292 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-19 15:01:25,292 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-19 15:01:25,292 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmset [2021-11-19 15:01:25,293 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmset [2021-11-19 15:01:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:01:25,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:01:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-19 15:01:25,293 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-19 15:01:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_bulk_callback [2021-11-19 15:01:25,294 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_bulk_callback [2021-11-19 15:01:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-19 15:01:25,294 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-19 15:01:26,164 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:01:26,168 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:01:26,963 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 15:01:35,122 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-19 15:02:06,479 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:02:06,510 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:02:06,510 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 15:02:06,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:02:06 BoogieIcfgContainer [2021-11-19 15:02:06,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:02:06,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:02:06,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:02:06,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:02:06,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:01:20" (1/3) ... [2021-11-19 15:02:06,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4076fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:02:06, skipping insertion in model container [2021-11-19 15:02:06,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:24" (2/3) ... [2021-11-19 15:02:06,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4076fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:02:06, skipping insertion in model container [2021-11-19 15:02:06,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:02:06" (3/3) ... [2021-11-19 15:02:06,535 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 15:02:06,550 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:02:06,555 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:02:06,631 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:02:06,639 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 15:02:06,640 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:02:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 1491 states, 1062 states have (on average 1.3455743879472692) internal successors, (1429), 1098 states have internal predecessors, (1429), 346 states have call successors, (346), 83 states have call predecessors, (346), 81 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) [2021-11-19 15:02:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 15:02:06,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:06,725 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:06,726 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:06,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:06,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1133064844, now seen corresponding path program 1 times [2021-11-19 15:02:06,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:06,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733866692] [2021-11-19 15:02:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:06,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:06,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:06,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:06,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:02:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:09,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 3753 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:02:09,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:02:09,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:02:10,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:10,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733866692] [2021-11-19 15:02:10,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733866692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:10,801 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:02:10,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:02:10,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118798212] [2021-11-19 15:02:10,805 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:10,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:02:10,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:10,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:02:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:02:10,872 INFO L87 Difference]: Start difference. First operand has 1491 states, 1062 states have (on average 1.3455743879472692) internal successors, (1429), 1098 states have internal predecessors, (1429), 346 states have call successors, (346), 83 states have call predecessors, (346), 81 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 15:02:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:11,527 INFO L93 Difference]: Finished difference Result 2986 states and 4315 transitions. [2021-11-19 15:02:11,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:02:11,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 117 [2021-11-19 15:02:11,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:11,571 INFO L225 Difference]: With dead ends: 2986 [2021-11-19 15:02:11,571 INFO L226 Difference]: Without dead ends: 1479 [2021-11-19 15:02:11,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:02:11,592 INFO L933 BasicCegarLoop]: 2099 mSDtfsCounter, 7 mSDsluCounter, 4196 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 6295 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:11,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 6295 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:02:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-11-19 15:02:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1479. [2021-11-19 15:02:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1062 states have (on average 1.3342749529190208) internal successors, (1417), 1085 states have internal predecessors, (1417), 335 states have call successors, (335), 82 states have call predecessors, (335), 81 states have return successors, (329), 321 states have call predecessors, (329), 329 states have call successors, (329) [2021-11-19 15:02:11,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 2081 transitions. [2021-11-19 15:02:11,811 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 2081 transitions. Word has length 117 [2021-11-19 15:02:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:11,813 INFO L470 AbstractCegarLoop]: Abstraction has 1479 states and 2081 transitions. [2021-11-19 15:02:11,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 15:02:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 2081 transitions. [2021-11-19 15:02:11,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 15:02:11,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:11,828 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:11,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 15:02:12,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:02:12,054 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:12,054 INFO L85 PathProgramCache]: Analyzing trace with hash 285442252, now seen corresponding path program 1 times [2021-11-19 15:02:12,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:12,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307710458] [2021-11-19 15:02:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:12,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:12,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:12,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:12,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:02:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:14,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 3763 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:02:14,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:02:15,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:02:16,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:16,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307710458] [2021-11-19 15:02:16,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307710458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:16,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [952167913] [2021-11-19 15:02:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:16,522 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:16,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:16,529 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:16,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-19 15:02:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:18,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 3763 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:02:18,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:02:19,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:02:19,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [952167913] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:19,782 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:02:19,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-19 15:02:19,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450634576] [2021-11-19 15:02:19,784 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:19,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:02:19,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:19,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:02:19,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:02:19,787 INFO L87 Difference]: Start difference. First operand 1479 states and 2081 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:02:22,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:02:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:30,493 INFO L93 Difference]: Finished difference Result 5692 states and 8013 transitions. [2021-11-19 15:02:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:02:30,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 119 [2021-11-19 15:02:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:30,534 INFO L225 Difference]: With dead ends: 5692 [2021-11-19 15:02:30,534 INFO L226 Difference]: Without dead ends: 4252 [2021-11-19 15:02:30,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:02:30,544 INFO L933 BasicCegarLoop]: 2699 mSDtfsCounter, 3979 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3979 SdHoareTripleChecker+Valid, 7910 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:30,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3979 Valid, 7910 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 664 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2021-11-19 15:02:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2021-11-19 15:02:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 4246. [2021-11-19 15:02:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4246 states, 3065 states have (on average 1.3386623164763458) internal successors, (4103), 3124 states have internal predecessors, (4103), 941 states have call successors, (941), 240 states have call predecessors, (941), 239 states have return successors, (935), 911 states have call predecessors, (935), 935 states have call successors, (935) [2021-11-19 15:02:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4246 states to 4246 states and 5979 transitions. [2021-11-19 15:02:30,779 INFO L78 Accepts]: Start accepts. Automaton has 4246 states and 5979 transitions. Word has length 119 [2021-11-19 15:02:30,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:30,780 INFO L470 AbstractCegarLoop]: Abstraction has 4246 states and 5979 transitions. [2021-11-19 15:02:30,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:02:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4246 states and 5979 transitions. [2021-11-19 15:02:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 15:02:30,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:30,786 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:30,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:31,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-19 15:02:31,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:31,210 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1173241140, now seen corresponding path program 1 times [2021-11-19 15:02:31,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:31,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047234982] [2021-11-19 15:02:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:31,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:31,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:31,217 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:31,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:02:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:33,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:02:33,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:02:34,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:02:35,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:35,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047234982] [2021-11-19 15:02:35,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047234982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:35,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [116359625] [2021-11-19 15:02:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:35,255 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:35,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:35,256 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:35,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-19 15:02:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:37,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 3795 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:02:37,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:02:41,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:02:43,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [116359625] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:43,132 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:02:43,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [6, 6] total 12 [2021-11-19 15:02:43,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116880134] [2021-11-19 15:02:43,132 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:43,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:02:43,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:43,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:02:43,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:02:43,135 INFO L87 Difference]: Start difference. First operand 4246 states and 5979 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 15:02:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:43,901 INFO L93 Difference]: Finished difference Result 12643 states and 18082 transitions. [2021-11-19 15:02:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:02:43,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 131 [2021-11-19 15:02:43,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:43,977 INFO L225 Difference]: With dead ends: 12643 [2021-11-19 15:02:43,977 INFO L226 Difference]: Without dead ends: 8445 [2021-11-19 15:02:43,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:02:44,001 INFO L933 BasicCegarLoop]: 2538 mSDtfsCounter, 2040 mSDsluCounter, 4018 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 6556 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:44,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2040 Valid, 6556 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:02:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8445 states. [2021-11-19 15:02:44,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8445 to 8432. [2021-11-19 15:02:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 6097 states have (on average 1.3388551746760702) internal successors, (8163), 6210 states have internal predecessors, (8163), 1858 states have call successors, (1858), 477 states have call predecessors, (1858), 476 states have return successors, (1957), 1804 states have call predecessors, (1957), 1852 states have call successors, (1957) [2021-11-19 15:02:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 11978 transitions. [2021-11-19 15:02:44,565 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 11978 transitions. Word has length 131 [2021-11-19 15:02:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:44,567 INFO L470 AbstractCegarLoop]: Abstraction has 8432 states and 11978 transitions. [2021-11-19 15:02:44,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 15:02:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 11978 transitions. [2021-11-19 15:02:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 15:02:44,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:44,573 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:44,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:44,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:44,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:44,998 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:44,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:44,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2010034213, now seen corresponding path program 1 times [2021-11-19 15:02:45,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:45,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768250923] [2021-11-19 15:02:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:45,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:45,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:45,003 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:45,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:02:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:47,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 3796 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:02:47,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:02:47,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:02:49,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:49,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768250923] [2021-11-19 15:02:49,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768250923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:49,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1562006716] [2021-11-19 15:02:49,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:49,067 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:49,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:49,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:49,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 15:02:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:50,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 3796 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:02:50,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:02:55,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:02:56,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1562006716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:56,952 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:02:56,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [6, 6] total 12 [2021-11-19 15:02:56,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786561067] [2021-11-19 15:02:56,952 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:56,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:02:56,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:56,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:02:56,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:02:56,954 INFO L87 Difference]: Start difference. First operand 8432 states and 11978 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 15:02:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:59,030 INFO L93 Difference]: Finished difference Result 8434 states and 11979 transitions. [2021-11-19 15:02:59,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:02:59,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 132 [2021-11-19 15:02:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:59,112 INFO L225 Difference]: With dead ends: 8434 [2021-11-19 15:02:59,113 INFO L226 Difference]: Without dead ends: 8431 [2021-11-19 15:02:59,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:02:59,121 INFO L933 BasicCegarLoop]: 2070 mSDtfsCounter, 3352 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3352 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:59,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3352 Valid, 2070 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 15:02:59,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8431 states. [2021-11-19 15:02:59,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8431 to 8431. [2021-11-19 15:02:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 6097 states have (on average 1.338691159586682) internal successors, (8162), 6209 states have internal predecessors, (8162), 1857 states have call successors, (1857), 477 states have call predecessors, (1857), 476 states have return successors, (1957), 1804 states have call predecessors, (1957), 1852 states have call successors, (1957) [2021-11-19 15:02:59,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 11976 transitions. [2021-11-19 15:02:59,826 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 11976 transitions. Word has length 132 [2021-11-19 15:02:59,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:59,828 INFO L470 AbstractCegarLoop]: Abstraction has 8431 states and 11976 transitions. [2021-11-19 15:02:59,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 15:02:59,830 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 11976 transitions. [2021-11-19 15:02:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 15:02:59,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:59,841 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:59,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:00,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:00,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:00,266 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:00,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:00,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2114146729, now seen corresponding path program 1 times [2021-11-19 15:03:00,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:00,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470818135] [2021-11-19 15:03:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:00,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:00,274 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:00,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:03:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:02,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 3797 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:03:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:03:03,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:03:04,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:04,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470818135] [2021-11-19 15:03:04,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470818135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:04,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [797410066] [2021-11-19 15:03:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:04,447 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:04,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:03:04,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:03:04,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 15:03:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:06,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 3797 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:03:06,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:03:08,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:03:09,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [797410066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:09,586 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:03:09,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [6, 6] total 11 [2021-11-19 15:03:09,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609983907] [2021-11-19 15:03:09,587 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:09,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:03:09,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:09,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:03:09,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:03:09,588 INFO L87 Difference]: Start difference. First operand 8431 states and 11976 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 15:03:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:09,913 INFO L93 Difference]: Finished difference Result 8433 states and 11977 transitions. [2021-11-19 15:03:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:03:09,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 133 [2021-11-19 15:03:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:09,981 INFO L225 Difference]: With dead ends: 8433 [2021-11-19 15:03:09,981 INFO L226 Difference]: Without dead ends: 8430 [2021-11-19 15:03:09,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:03:09,987 INFO L933 BasicCegarLoop]: 2068 mSDtfsCounter, 1979 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1979 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:09,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1979 Valid, 2068 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:03:10,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8430 states. [2021-11-19 15:03:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8430 to 8430. [2021-11-19 15:03:10,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8430 states, 6097 states have (on average 1.3385271444972937) internal successors, (8161), 6208 states have internal predecessors, (8161), 1856 states have call successors, (1856), 477 states have call predecessors, (1856), 476 states have return successors, (1957), 1804 states have call predecessors, (1957), 1852 states have call successors, (1957) [2021-11-19 15:03:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8430 states to 8430 states and 11974 transitions. [2021-11-19 15:03:10,528 INFO L78 Accepts]: Start accepts. Automaton has 8430 states and 11974 transitions. Word has length 133 [2021-11-19 15:03:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:10,529 INFO L470 AbstractCegarLoop]: Abstraction has 8430 states and 11974 transitions. [2021-11-19 15:03:10,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 15:03:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 8430 states and 11974 transitions. [2021-11-19 15:03:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 15:03:10,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:10,536 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:10,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:10,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:10,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:10,950 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:10,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1114732184, now seen corresponding path program 1 times [2021-11-19 15:03:10,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:10,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866941592] [2021-11-19 15:03:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:10,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:10,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:10,956 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:10,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:03:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:13,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 3798 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:03:13,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:03:13,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:03:15,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:15,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866941592] [2021-11-19 15:03:15,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866941592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:15,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267346927] [2021-11-19 15:03:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:15,109 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:15,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:03:15,110 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:03:15,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 15:03:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:16,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 3798 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:03:16,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:03:19,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:03:20,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267346927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:20,197 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:03:20,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [6, 6] total 11 [2021-11-19 15:03:20,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036217956] [2021-11-19 15:03:20,197 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:20,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:03:20,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:20,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:03:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:03:20,198 INFO L87 Difference]: Start difference. First operand 8430 states and 11974 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 15:03:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:20,784 INFO L93 Difference]: Finished difference Result 25089 states and 36082 transitions. [2021-11-19 15:03:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:03:20,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 134 [2021-11-19 15:03:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:20,875 INFO L225 Difference]: With dead ends: 25089 [2021-11-19 15:03:20,875 INFO L226 Difference]: Without dead ends: 16707 [2021-11-19 15:03:20,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:03:20,919 INFO L933 BasicCegarLoop]: 2679 mSDtfsCounter, 1949 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1949 SdHoareTripleChecker+Valid, 4718 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:20,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1949 Valid, 4718 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:03:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16707 states. [2021-11-19 15:03:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16707 to 16673. [2021-11-19 15:03:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16673 states, 12083 states have (on average 1.3403128362161716) internal successors, (16195), 12309 states have internal predecessors, (16195), 3645 states have call successors, (3645), 946 states have call predecessors, (3645), 944 states have return successors, (4067), 3537 states have call predecessors, (4067), 3638 states have call successors, (4067) [2021-11-19 15:03:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16673 states to 16673 states and 23907 transitions. [2021-11-19 15:03:22,029 INFO L78 Accepts]: Start accepts. Automaton has 16673 states and 23907 transitions. Word has length 134 [2021-11-19 15:03:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:22,030 INFO L470 AbstractCegarLoop]: Abstraction has 16673 states and 23907 transitions. [2021-11-19 15:03:22,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 15:03:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 16673 states and 23907 transitions. [2021-11-19 15:03:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 15:03:22,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:22,036 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:22,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:22,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:22,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:22,450 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:22,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:22,450 INFO L85 PathProgramCache]: Analyzing trace with hash -197647494, now seen corresponding path program 1 times [2021-11-19 15:03:22,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:22,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406387527] [2021-11-19 15:03:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:22,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:22,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:22,455 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:22,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:03:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:24,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 3799 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:03:24,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:03:25,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 15:03:26,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:26,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406387527] [2021-11-19 15:03:26,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406387527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:26,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1814063877] [2021-11-19 15:03:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:26,565 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:26,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:03:26,566 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:03:26,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 15:03:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 3799 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:03:28,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:03:30,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:03:31,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1814063877] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:31,640 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:03:31,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [6, 6] total 11 [2021-11-19 15:03:31,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712665008] [2021-11-19 15:03:31,641 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:31,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:03:31,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:31,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:03:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:03:31,643 INFO L87 Difference]: Start difference. First operand 16673 states and 23907 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 15:03:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:32,165 INFO L93 Difference]: Finished difference Result 16675 states and 23908 transitions. [2021-11-19 15:03:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:03:32,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 135 [2021-11-19 15:03:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:32,251 INFO L225 Difference]: With dead ends: 16675 [2021-11-19 15:03:32,252 INFO L226 Difference]: Without dead ends: 16654 [2021-11-19 15:03:32,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:03:32,265 INFO L933 BasicCegarLoop]: 2067 mSDtfsCounter, 1975 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:32,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1975 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:03:32,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16654 states. [2021-11-19 15:03:33,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16654 to 16654. [2021-11-19 15:03:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16654 states, 12069 states have (on average 1.3402933134476758) internal successors, (16176), 12294 states have internal predecessors, (16176), 3642 states have call successors, (3642), 944 states have call predecessors, (3642), 942 states have return successors, (4065), 3535 states have call predecessors, (4065), 3636 states have call successors, (4065) [2021-11-19 15:03:33,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16654 states to 16654 states and 23883 transitions. [2021-11-19 15:03:33,657 INFO L78 Accepts]: Start accepts. Automaton has 16654 states and 23883 transitions. Word has length 135 [2021-11-19 15:03:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:33,658 INFO L470 AbstractCegarLoop]: Abstraction has 16654 states and 23883 transitions. [2021-11-19 15:03:33,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 15:03:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 16654 states and 23883 transitions. [2021-11-19 15:03:33,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 15:03:33,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:33,670 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:33,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:33,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:34,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:34,086 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1337568515, now seen corresponding path program 1 times [2021-11-19 15:03:34,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:34,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326861596] [2021-11-19 15:03:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:34,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:34,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:34,095 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:34,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:03:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:36,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 3894 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:03:36,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:03:37,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 15:03:39,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:39,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326861596] [2021-11-19 15:03:39,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326861596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:39,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [186874713] [2021-11-19 15:03:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:39,069 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:39,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:03:39,070 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:03:39,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 15:03:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:41,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 3894 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:03:41,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-19 15:03:42,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-19 15:03:42,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [186874713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:42,662 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:03:42,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 15:03:42,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113669689] [2021-11-19 15:03:42,663 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:42,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:03:42,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:03:42,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:03:42,665 INFO L87 Difference]: Start difference. First operand 16654 states and 23883 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-19 15:03:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:44,788 INFO L93 Difference]: Finished difference Result 49232 states and 70500 transitions. [2021-11-19 15:03:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:03:44,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 156 [2021-11-19 15:03:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:44,948 INFO L225 Difference]: With dead ends: 49232 [2021-11-19 15:03:44,948 INFO L226 Difference]: Without dead ends: 32626 [2021-11-19 15:03:45,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 611 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:03:45,030 INFO L933 BasicCegarLoop]: 2377 mSDtfsCounter, 1959 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 4383 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:45,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1959 Valid, 4383 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:03:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32626 states. [2021-11-19 15:03:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32626 to 32574. [2021-11-19 15:03:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32574 states, 23633 states have (on average 1.3397368086996995) internal successors, (31662), 24074 states have internal predecessors, (31662), 7068 states have call successors, (7068), 1874 states have call predecessors, (7068), 1872 states have return successors, (7890), 6865 states have call predecessors, (7890), 7062 states have call successors, (7890) [2021-11-19 15:03:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32574 states to 32574 states and 46620 transitions. [2021-11-19 15:03:47,390 INFO L78 Accepts]: Start accepts. Automaton has 32574 states and 46620 transitions. Word has length 156 [2021-11-19 15:03:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:47,391 INFO L470 AbstractCegarLoop]: Abstraction has 32574 states and 46620 transitions. [2021-11-19 15:03:47,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-19 15:03:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 32574 states and 46620 transitions. [2021-11-19 15:03:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-19 15:03:47,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:47,428 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:47,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:47,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:47,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:47,844 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:47,845 INFO L85 PathProgramCache]: Analyzing trace with hash -723791998, now seen corresponding path program 1 times [2021-11-19 15:03:47,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:47,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91047862] [2021-11-19 15:03:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:47,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:47,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:47,855 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:47,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:03:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:50,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 4212 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:03:50,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-19 15:03:52,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-19 15:03:53,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:53,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91047862] [2021-11-19 15:03:53,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91047862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:53,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1816034293] [2021-11-19 15:03:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:53,831 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:53,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:03:53,834 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:03:53,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 15:03:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:55,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 4212 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:03:55,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-11-19 15:03:57,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-11-19 15:03:58,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1816034293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:58,247 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:03:58,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 15:03:58,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141288582] [2021-11-19 15:03:58,248 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:58,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:03:58,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:58,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:03:58,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:03:58,251 INFO L87 Difference]: Start difference. First operand 32574 states and 46620 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 15:04:00,702 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:04:03,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:04:03,512 INFO L93 Difference]: Finished difference Result 89372 states and 127290 transitions. [2021-11-19 15:04:03,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:04:03,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 215 [2021-11-19 15:04:03,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:04:03,834 INFO L225 Difference]: With dead ends: 89372 [2021-11-19 15:04:03,834 INFO L226 Difference]: Without dead ends: 56844 [2021-11-19 15:04:04,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 847 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:04:04,251 INFO L933 BasicCegarLoop]: 2736 mSDtfsCounter, 1543 mSDsluCounter, 1934 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 4670 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:04:04,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 4670 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 15:04:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56844 states. [2021-11-19 15:04:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56844 to 56780. [2021-11-19 15:04:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56780 states, 40937 states have (on average 1.326403986613577) internal successors, (54299), 41796 states have internal predecessors, (54299), 12394 states have call successors, (12394), 3450 states have call predecessors, (12394), 3448 states have return successors, (13954), 11989 states have call predecessors, (13954), 12388 states have call successors, (13954) [2021-11-19 15:04:08,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56780 states to 56780 states and 80647 transitions. [2021-11-19 15:04:08,435 INFO L78 Accepts]: Start accepts. Automaton has 56780 states and 80647 transitions. Word has length 215 [2021-11-19 15:04:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:04:08,436 INFO L470 AbstractCegarLoop]: Abstraction has 56780 states and 80647 transitions. [2021-11-19 15:04:08,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 15:04:08,437 INFO L276 IsEmpty]: Start isEmpty. Operand 56780 states and 80647 transitions. [2021-11-19 15:04:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-19 15:04:08,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:08,476 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:04:08,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:04:08,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 15:04:08,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:04:08,890 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:08,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1936545456, now seen corresponding path program 1 times [2021-11-19 15:04:08,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:04:08,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463812306] [2021-11-19 15:04:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:08,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:04:08,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:04:08,897 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:04:08,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 15:04:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:11,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 4032 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:04:11,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-11-19 15:04:12,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-19 15:04:14,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:04:14,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463812306] [2021-11-19 15:04:14,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463812306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:04:14,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [322009879] [2021-11-19 15:04:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:14,562 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:04:14,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:04:14,563 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:04:14,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 15:04:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 4032 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:04:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-19 15:04:17,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-11-19 15:04:19,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [322009879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:04:19,043 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:04:19,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 14 [2021-11-19 15:04:19,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166445390] [2021-11-19 15:04:19,044 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:04:19,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:04:19,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:04:19,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:04:19,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:04:19,047 INFO L87 Difference]: Start difference. First operand 56780 states and 80647 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 4 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-19 15:04:21,475 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:04:23,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:04:26,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:04:26,052 INFO L93 Difference]: Finished difference Result 99070 states and 140534 transitions. [2021-11-19 15:04:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:04:26,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 4 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 208 [2021-11-19 15:04:26,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:04:26,230 INFO L225 Difference]: With dead ends: 99070 [2021-11-19 15:04:26,230 INFO L226 Difference]: Without dead ends: 42322 [2021-11-19 15:04:26,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 816 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:04:26,369 INFO L933 BasicCegarLoop]: 2066 mSDtfsCounter, 28 mSDsluCounter, 8245 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 10311 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:04:26,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 10311 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2021-11-19 15:04:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42322 states. [2021-11-19 15:04:28,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42322 to 41945. [2021-11-19 15:04:28,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41945 states, 30190 states have (on average 1.3238489566081484) internal successors, (39967), 30837 states have internal predecessors, (39967), 9164 states have call successors, (9164), 2592 states have call predecessors, (9164), 2590 states have return successors, (10320), 8855 states have call predecessors, (10320), 9158 states have call successors, (10320) [2021-11-19 15:04:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41945 states to 41945 states and 59451 transitions. [2021-11-19 15:04:28,689 INFO L78 Accepts]: Start accepts. Automaton has 41945 states and 59451 transitions. Word has length 208 [2021-11-19 15:04:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:04:28,690 INFO L470 AbstractCegarLoop]: Abstraction has 41945 states and 59451 transitions. [2021-11-19 15:04:28,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 4 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-19 15:04:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 41945 states and 59451 transitions. [2021-11-19 15:04:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-19 15:04:28,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:28,725 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:04:28,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:04:28,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-19 15:04:29,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:04:29,142 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:29,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:29,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1601389533, now seen corresponding path program 1 times [2021-11-19 15:04:29,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:04:29,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924515923] [2021-11-19 15:04:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:29,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:04:29,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:04:29,148 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:04:29,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 15:04:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:31,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 4145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:04:31,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-19 15:04:33,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-19 15:04:34,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:04:34,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924515923] [2021-11-19 15:04:34,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924515923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:04:34,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1481428249] [2021-11-19 15:04:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:34,854 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:04:34,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:04:34,856 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:04:34,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 15:04:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:36,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 4145 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:04:36,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-11-19 15:04:38,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-11-19 15:04:39,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1481428249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:04:39,164 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:04:39,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 15:04:39,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255067958] [2021-11-19 15:04:39,164 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:04:39,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:04:39,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:04:39,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:04:39,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:04:39,166 INFO L87 Difference]: Start difference. First operand 41945 states and 59451 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-19 15:04:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:04:43,052 INFO L93 Difference]: Finished difference Result 100109 states and 141300 transitions. [2021-11-19 15:04:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:04:43,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 217 [2021-11-19 15:04:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:04:43,275 INFO L225 Difference]: With dead ends: 100109 [2021-11-19 15:04:43,275 INFO L226 Difference]: Without dead ends: 58212 [2021-11-19 15:04:43,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:04:43,367 INFO L933 BasicCegarLoop]: 2366 mSDtfsCounter, 1398 mSDsluCounter, 1989 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 4355 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:04:43,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1398 Valid, 4355 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 15:04:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58212 states. [2021-11-19 15:04:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58212 to 57821. [2021-11-19 15:04:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57821 states, 41786 states have (on average 1.324103766811851) internal successors, (55329), 42669 states have internal predecessors, (55329), 12243 states have call successors, (12243), 3793 states have call predecessors, (12243), 3791 states have return successors, (13833), 11766 states have call predecessors, (13833), 12237 states have call successors, (13833) [2021-11-19 15:04:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57821 states to 57821 states and 81405 transitions. [2021-11-19 15:04:46,571 INFO L78 Accepts]: Start accepts. Automaton has 57821 states and 81405 transitions. Word has length 217 [2021-11-19 15:04:46,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:04:46,572 INFO L470 AbstractCegarLoop]: Abstraction has 57821 states and 81405 transitions. [2021-11-19 15:04:46,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-19 15:04:46,572 INFO L276 IsEmpty]: Start isEmpty. Operand 57821 states and 81405 transitions. [2021-11-19 15:04:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-19 15:04:46,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:46,857 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:04:46,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:04:47,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:04:47,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:04:47,258 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:47,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:47,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1957108566, now seen corresponding path program 1 times [2021-11-19 15:04:47,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:04:47,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428753678] [2021-11-19 15:04:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:47,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:04:47,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:04:47,266 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:04:47,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 15:04:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:49,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 4121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:04:49,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-11-19 15:04:51,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-19 15:04:52,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:04:52,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428753678] [2021-11-19 15:04:52,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428753678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:04:52,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1222563674] [2021-11-19 15:04:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:52,869 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:04:52,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:04:52,871 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:04:52,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 15:04:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:54,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 4121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:04:54,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-19 15:04:56,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-11-19 15:04:57,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1222563674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:04:57,221 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:04:57,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 13 [2021-11-19 15:04:57,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145477671] [2021-11-19 15:04:57,221 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:04:57,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:04:57,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:04:57,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:04:57,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:04:57,223 INFO L87 Difference]: Start difference. First operand 57821 states and 81405 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 4 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-19 15:04:59,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:05:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:03,166 INFO L93 Difference]: Finished difference Result 115472 states and 162567 transitions. [2021-11-19 15:05:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:05:03,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 4 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 216 [2021-11-19 15:05:03,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:03,360 INFO L225 Difference]: With dead ends: 115472 [2021-11-19 15:05:03,360 INFO L226 Difference]: Without dead ends: 57724 [2021-11-19 15:05:03,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 849 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:05:03,477 INFO L933 BasicCegarLoop]: 2078 mSDtfsCounter, 40 mSDsluCounter, 6190 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 8268 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:03,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 8268 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 15:05:03,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57724 states. [2021-11-19 15:05:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57724 to 57591. [2021-11-19 15:05:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57591 states, 41639 states have (on average 1.3246475659838133) internal successors, (55157), 42523 states have internal predecessors, (55157), 12183 states have call successors, (12183), 3770 states have call predecessors, (12183), 3768 states have return successors, (13773), 11705 states have call predecessors, (13773), 12177 states have call successors, (13773) [2021-11-19 15:05:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57591 states to 57591 states and 81113 transitions. [2021-11-19 15:05:06,921 INFO L78 Accepts]: Start accepts. Automaton has 57591 states and 81113 transitions. Word has length 216 [2021-11-19 15:05:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:06,922 INFO L470 AbstractCegarLoop]: Abstraction has 57591 states and 81113 transitions. [2021-11-19 15:05:06,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 4 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-19 15:05:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 57591 states and 81113 transitions. [2021-11-19 15:05:06,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-19 15:05:06,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:06,961 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:05:06,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:07,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:07,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:05:07,375 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:07,375 INFO L85 PathProgramCache]: Analyzing trace with hash -925728685, now seen corresponding path program 1 times [2021-11-19 15:05:07,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:07,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176431251] [2021-11-19 15:05:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:07,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:07,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:07,384 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:07,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 15:05:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:09,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 4163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:05:09,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2021-11-19 15:05:11,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2021-11-19 15:05:13,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:13,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176431251] [2021-11-19 15:05:13,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176431251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:05:13,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1482299177] [2021-11-19 15:05:13,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:13,110 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:05:13,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:05:13,111 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:05:13,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 15:05:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:15,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 4163 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:05:15,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2021-11-19 15:05:16,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2021-11-19 15:05:17,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1482299177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:17,489 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:05:17,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 15 [2021-11-19 15:05:17,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758202711] [2021-11-19 15:05:17,490 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:17,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:05:17,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:05:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:05:17,493 INFO L87 Difference]: Start difference. First operand 57591 states and 81113 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-19 15:05:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:23,206 INFO L93 Difference]: Finished difference Result 131773 states and 192011 transitions. [2021-11-19 15:05:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:05:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) Word has length 221 [2021-11-19 15:05:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:23,873 INFO L225 Difference]: With dead ends: 131773 [2021-11-19 15:05:23,873 INFO L226 Difference]: Without dead ends: 95029 [2021-11-19 15:05:23,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:05:23,978 INFO L933 BasicCegarLoop]: 3930 mSDtfsCounter, 1312 mSDsluCounter, 17250 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 21180 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:23,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 21180 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:05:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95029 states. [2021-11-19 15:05:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95029 to 55962. [2021-11-19 15:05:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55962 states, 40520 states have (on average 1.3252221125370187) internal successors, (53698), 41358 states have internal predecessors, (53698), 11788 states have call successors, (11788), 3627 states have call predecessors, (11788), 3653 states have return successors, (13284), 11372 states have call predecessors, (13284), 11784 states have call successors, (13284) [2021-11-19 15:05:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55962 states to 55962 states and 78770 transitions. [2021-11-19 15:05:28,161 INFO L78 Accepts]: Start accepts. Automaton has 55962 states and 78770 transitions. Word has length 221 [2021-11-19 15:05:28,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:28,162 INFO L470 AbstractCegarLoop]: Abstraction has 55962 states and 78770 transitions. [2021-11-19 15:05:28,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-19 15:05:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 55962 states and 78770 transitions. [2021-11-19 15:05:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-19 15:05:28,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:28,196 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:05:28,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:28,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-19 15:05:28,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:05:28,622 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:28,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1702541444, now seen corresponding path program 1 times [2021-11-19 15:05:28,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:28,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47713190] [2021-11-19 15:05:28,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:28,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:28,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:28,630 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:28,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 15:05:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:31,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 4224 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:05:31,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-11-19 15:05:33,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2021-11-19 15:05:34,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:34,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47713190] [2021-11-19 15:05:34,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47713190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:05:34,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821072140] [2021-11-19 15:05:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:34,733 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:05:34,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:05:34,734 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:05:34,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade167e8-7cd8-46c9-9dda-f2fb98666e63/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-19 15:05:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:36,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 4224 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:05:36,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2021-11-19 15:05:38,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-11-19 15:05:39,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [821072140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:39,166 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:05:39,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-19 15:05:39,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321876896] [2021-11-19 15:05:39,167 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:39,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:05:39,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:39,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:05:39,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:05:39,168 INFO L87 Difference]: Start difference. First operand 55962 states and 78770 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) [2021-11-19 15:05:41,538 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:05:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:53,032 INFO L93 Difference]: Finished difference Result 165659 states and 233183 transitions. [2021-11-19 15:05:53,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:05:53,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) Word has length 229 [2021-11-19 15:05:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:53,551 INFO L225 Difference]: With dead ends: 165659 [2021-11-19 15:05:53,551 INFO L226 Difference]: Without dead ends: 109812 [2021-11-19 15:05:53,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:05:53,684 INFO L933 BasicCegarLoop]: 3269 mSDtfsCounter, 3904 mSDsluCounter, 4855 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3904 SdHoareTripleChecker+Valid, 8124 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:53,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3904 Valid, 8124 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 616 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2021-11-19 15:05:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109812 states.