./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF --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 36ffbabf76f0a0e87302d8b80308134217d4fdef380ae154dfcdec710817c6e2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:05:59,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:05:59,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:05:59,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:05:59,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:05:59,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:05:59,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:05:59,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:05:59,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:05:59,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:05:59,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:05:59,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:05:59,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:05:59,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:05:59,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:05:59,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:05:59,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:05:59,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:05:59,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:05:59,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:05:59,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:05:59,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:05:59,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:05:59,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:05:59,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:05:59,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:05:59,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:05:59,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:05:59,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:05:59,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:05:59,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:05:59,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:05:59,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:05:59,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:05:59,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:05:59,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:05:59,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:05:59,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:05:59,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:05:59,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:05:59,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:05:59,286 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:05:59,331 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:05:59,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:05:59,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:05:59,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:05:59,333 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:05:59,333 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:05:59,333 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:05:59,334 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:05:59,334 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:05:59,334 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:05:59,335 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:05:59,336 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:05:59,336 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:05:59,336 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:05:59,336 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:05:59,337 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:05:59,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:05:59,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:05:59,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:05:59,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:05:59,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:05:59,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:05:59,339 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:05:59,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:05:59,339 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:05:59,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:05:59,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:05:59,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:05:59,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:05:59,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:05:59,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:05:59,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:05:59,342 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:05:59,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:05:59,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:05:59,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:05:59,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:05:59,344 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_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36ffbabf76f0a0e87302d8b80308134217d4fdef380ae154dfcdec710817c6e2 [2021-11-12 23:05:59,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:05:59,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:05:59,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:05:59,657 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:05:59,657 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:05:59,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:05:59,718 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/data/d5a7dde32/1d2c4a79e3a741faa2b512ba1311b1f0/FLAGac3838230 [2021-11-12 23:06:00,606 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:06:00,608 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:06:00,663 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/data/d5a7dde32/1d2c4a79e3a741faa2b512ba1311b1f0/FLAGac3838230 [2021-11-12 23:06:01,062 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/data/d5a7dde32/1d2c4a79e3a741faa2b512ba1311b1f0 [2021-11-12 23:06:01,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:06:01,066 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:06:01,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:06:01,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:06:01,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:06:01,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:06:01" (1/1) ... [2021-11-12 23:06:01,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@359fc042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:01, skipping insertion in model container [2021-11-12 23:06:01,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:06:01" (1/1) ... [2021-11-12 23:06:01,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:06:01,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:06:01,740 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3834] [2021-11-12 23:06:01,743 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3835-3836] [2021-11-12 23:06:02,156 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[119274,119287] [2021-11-12 23:06:02,416 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,456 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,615 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,665 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,666 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,671 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,672 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,678 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,678 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,684 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,685 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,719 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,729 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,734 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,745 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,751 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,756 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,766 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,773 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,777 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,782 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,788 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,795 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,801 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,808 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,813 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,817 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,821 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,826 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,832 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,837 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,882 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,887 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,933 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,934 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:02,966 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,009 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,022 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,027 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,028 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,032 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,073 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,073 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,074 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,074 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,079 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,079 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,080 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,080 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,080 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,081 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,081 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,082 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,082 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,082 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:06:03,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:06:03,187 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) [2021-11-12 23:06:03,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c8e4e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:03, skipping insertion in model container [2021-11-12 23:06:03,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:06:03,188 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:06:03,190 INFO L158 Benchmark]: Toolchain (without parser) took 2123.13ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 60.0MB in the beginning and 53.0MB in the end (delta: 7.0MB). Peak memory consumption was 36.7MB. Max. memory is 16.1GB. [2021-11-12 23:06:03,191 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 90.2MB. Free memory was 65.9MB in the beginning and 65.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:06:03,191 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2120.83ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 59.7MB in the beginning and 53.0MB in the end (delta: 6.8MB). Peak memory consumption was 36.7MB. Max. memory is 16.1GB. [2021-11-12 23:06:03,193 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 90.2MB. Free memory was 65.9MB in the beginning and 65.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2120.83ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 59.7MB in the beginning and 53.0MB in the end (delta: 6.8MB). Peak memory consumption was 36.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4052]: 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_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF --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 36ffbabf76f0a0e87302d8b80308134217d4fdef380ae154dfcdec710817c6e2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:06:05,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:06:05,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:06:05,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:06:05,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:06:05,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:06:05,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:06:05,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:06:05,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:06:05,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:06:05,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:06:05,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:06:05,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:06:05,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:06:05,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:06:05,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:06:05,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:06:05,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:06:05,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:06:05,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:06:05,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:06:05,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:06:05,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:06:05,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:06:05,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:06:05,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:06:05,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:06:05,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:06:05,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:06:05,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:06:05,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:06:05,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:06:05,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:06:05,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:06:05,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:06:05,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:06:05,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:06:05,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:06:05,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:06:05,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:06:05,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:06:05,543 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:06:05,585 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:06:05,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:06:05,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:06:05,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:06:05,587 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:06:05,588 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:06:05,588 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:06:05,588 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:06:05,588 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:06:05,588 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:06:05,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:06:05,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:06:05,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:06:05,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:06:05,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:06:05,592 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:06:05,592 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:06:05,592 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:06:05,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:06:05,592 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:06:05,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:06:05,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:06:05,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:06:05,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:06:05,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:06:05,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:06:05,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:06:05,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:06:05,594 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:06:05,594 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:06:05,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:06:05,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:06:05,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:06:05,595 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_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36ffbabf76f0a0e87302d8b80308134217d4fdef380ae154dfcdec710817c6e2 [2021-11-12 23:06:05,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:06:05,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:06:06,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:06:06,001 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:06:06,002 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:06:06,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:06:06,074 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/data/91fbe06d8/eaba8a9502cc4930911dc3b4c9c689a2/FLAGbfc14c39c [2021-11-12 23:06:07,022 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:06:07,024 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:06:07,087 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/data/91fbe06d8/eaba8a9502cc4930911dc3b4c9c689a2/FLAGbfc14c39c [2021-11-12 23:06:07,454 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/data/91fbe06d8/eaba8a9502cc4930911dc3b4c9c689a2 [2021-11-12 23:06:07,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:06:07,461 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:06:07,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:06:07,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:06:07,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:06:07,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:06:07" (1/1) ... [2021-11-12 23:06:07,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb89fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:07, skipping insertion in model container [2021-11-12 23:06:07,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:06:07" (1/1) ... [2021-11-12 23:06:07,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:06:07,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:06:08,125 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3834] [2021-11-12 23:06:08,125 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3835-3836] [2021-11-12 23:06:08,697 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[119274,119287] [2021-11-12 23:06:09,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:06:09,791 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:06:09,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:06:09,939 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3834] [2021-11-12 23:06:09,940 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3835-3836] [2021-11-12 23:06:09,963 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[119274,119287] [2021-11-12 23:06:10,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:06:10,237 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:06:10,368 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3834] [2021-11-12 23:06:10,368 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3835-3836] [2021-11-12 23:06:10,383 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[119274,119287] [2021-11-12 23:06:10,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:06:10,861 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:06:10,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:10 WrapperNode [2021-11-12 23:06:10,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:06:10,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:06:10,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:06:10,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:06:10,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:10" (1/1) ... [2021-11-12 23:06:11,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:10" (1/1) ... [2021-11-12 23:06:11,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:06:11,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:06:11,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:06:11,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:06:11,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:10" (1/1) ... [2021-11-12 23:06:11,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:10" (1/1) ... [2021-11-12 23:06:11,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:10" (1/1) ... [2021-11-12 23:06:11,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:10" (1/1) ... [2021-11-12 23:06:11,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:10" (1/1) ... [2021-11-12 23:06:11,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:10" (1/1) ... [2021-11-12 23:06:11,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:10" (1/1) ... [2021-11-12 23:06:11,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:06:11,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:06:11,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:06:11,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:06:11,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:10" (1/1) ... [2021-11-12 23:06:11,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:06:11,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:06:11,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:06:11,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:06:11,936 INFO L130 BoogieDeclarations]: Found specification of procedure acm_disconnect [2021-11-12 23:06:11,936 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_disconnect [2021-11-12 23:06:11,936 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_hangup [2021-11-12 23:06:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_hangup [2021-11-12 23:06:11,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:06:11,937 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2021-11-12 23:06:11,937 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-12 23:06:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-12 23:06:11,937 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-12 23:06:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-12 23:06:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:06:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-12 23:06:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:06:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:06:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:06:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:06:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:06:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:06:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-12 23:06:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-12 23:06:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_cleanup [2021-11-12 23:06:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_cleanup [2021-11-12 23:06:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-12 23:06:11,940 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-12 23:06:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-12 23:06:11,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-12 23:06:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:06:11,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:06:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-12 23:06:11,941 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-12 23:06:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2021-11-12 23:06:11,941 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2021-11-12 23:06:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_buffers_free [2021-11-12 23:06:11,941 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_buffers_free [2021-11-12 23:06:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-12 23:06:11,942 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-12 23:06:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-12 23:06:11,942 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-12 23:06:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 23:06:11,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 23:06:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-12 23:06:11,943 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-12 23:06:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-12 23:06:11,943 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-12 23:06:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:06:11,943 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:06:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:06:11,944 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:06:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-12 23:06:11,944 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-12 23:06:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_put [2021-11-12 23:06:11,944 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_put [2021-11-12 23:06:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_chars_in_buffer [2021-11-12 23:06:11,945 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_chars_in_buffer [2021-11-12 23:06:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure acm_resume [2021-11-12 23:06:11,945 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_resume [2021-11-12 23:06:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:06:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-12 23:06:11,945 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-12 23:06:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 23:06:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_msg [2021-11-12 23:06:11,946 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_msg [2021-11-12 23:06:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-12 23:06:11,946 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-12 23:06:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:06:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_hangup [2021-11-12 23:06:11,947 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_hangup [2021-11-12 23:06:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2021-11-12 23:06:11,947 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2021-11-12 23:06:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-12 23:06:11,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-12 23:06:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-12 23:06:11,948 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-12 23:06:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:06:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:06:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:06:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:06:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:06:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:06:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-12 23:06:11,949 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-12 23:06:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 23:06:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:06:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:06:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:06:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-12 23:06:11,950 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-12 23:06:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-12 23:06:11,950 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-12 23:06:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmget [2021-11-12 23:06:11,951 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmget [2021-11-12 23:06:11,951 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-12 23:06:11,951 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-12 23:06:11,951 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_set_termios [2021-11-12 23:06:11,951 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_set_termios [2021-11-12 23:06:11,951 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_from_anchor [2021-11-12 23:06:11,952 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_from_anchor [2021-11-12 23:06:11,952 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-12 23:06:11,952 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-12 23:06:11,952 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-12 23:06:11,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-12 23:06:11,952 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-12 23:06:11,952 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-12 23:06:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_break_ctl [2021-11-12 23:06:11,953 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_break_ctl [2021-11-12 23:06:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-12 23:06:11,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-12 23:06:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-12 23:06:11,953 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-12 23:06:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure acm_start_wb [2021-11-12 23:06:11,954 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_start_wb [2021-11-12 23:06:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-12 23:06:11,954 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-12 23:06:11,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:06:11,954 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:06:11,955 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-12 23:06:11,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-12 23:06:11,955 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_throttle [2021-11-12 23:06:11,955 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_throttle [2021-11-12 23:06:11,955 INFO L130 BoogieDeclarations]: Found specification of procedure acm_wb_is_avail [2021-11-12 23:06:11,955 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_wb_is_avail [2021-11-12 23:06:11,956 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-12 23:06:11,956 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-12 23:06:11,956 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-12 23:06:11,956 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-12 23:06:11,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-12 23:06:11,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-12 23:06:11,957 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_write_room [2021-11-12 23:06:11,957 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_write_room [2021-11-12 23:06:11,957 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urb [2021-11-12 23:06:11,957 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urb [2021-11-12 23:06:11,957 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-12 23:06:11,957 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-12 23:06:11,957 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:06:11,958 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:06:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-12 23:06:11,958 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-12 23:06:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_done [2021-11-12 23:06:11,958 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_done [2021-11-12 23:06:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_ioctl [2021-11-12 23:06:11,959 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_ioctl [2021-11-12 23:06:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure acm_release_minor [2021-11-12 23:06:11,959 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_release_minor [2021-11-12 23:06:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:06:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:06:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:06:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:06:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-12 23:06:11,960 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-12 23:06:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:06:11,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:06:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2021-11-12 23:06:11,960 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2021-11-12 23:06:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_unthrottle [2021-11-12 23:06:11,961 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_unthrottle [2021-11-12 23:06:11,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:06:11,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:06:11,961 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-12 23:06:11,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:06:11,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:06:11,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:06:11,962 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-12 23:06:11,962 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-12 23:06:11,962 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-12 23:06:11,962 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-12 23:06:11,962 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-11-12 23:06:11,962 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-11-12 23:06:11,963 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_dtr_rts [2021-11-12 23:06:11,963 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_dtr_rts [2021-11-12 23:06:11,963 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-12 23:06:11,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-12 23:06:11,963 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-12 23:06:11,963 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-12 23:06:11,963 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_buffers_free [2021-11-12 23:06:11,964 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_buffers_free [2021-11-12 23:06:11,964 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urbs [2021-11-12 23:06:11,964 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urbs [2021-11-12 23:06:11,964 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_install [2021-11-12 23:06:11,964 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_install [2021-11-12 23:06:11,964 INFO L130 BoogieDeclarations]: Found specification of procedure stop_data_traffic [2021-11-12 23:06:11,964 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_data_traffic [2021-11-12 23:06:11,965 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-12 23:06:11,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-12 23:06:11,965 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-12 23:06:11,965 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-12 23:06:11,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:06:11,965 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-12 23:06:11,965 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-12 23:06:11,966 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-12 23:06:11,966 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-12 23:06:11,966 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmset [2021-11-12 23:06:11,966 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmset [2021-11-12 23:06:11,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:06:11,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:06:11,966 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-12 23:06:11,967 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-12 23:06:11,967 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-12 23:06:11,967 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-12 23:06:13,489 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:07:10,962 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:07:10,962 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:07:10,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:07:10 BoogieIcfgContainer [2021-11-12 23:07:10,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:07:10,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:07:10,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:07:10,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:07:10,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:06:07" (1/3) ... [2021-11-12 23:07:10,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f395e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:07:10, skipping insertion in model container [2021-11-12 23:07:10,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:06:10" (2/3) ... [2021-11-12 23:07:10,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f395e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:07:10, skipping insertion in model container [2021-11-12 23:07:10,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:07:10" (3/3) ... [2021-11-12 23:07:10,975 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-12 23:07:10,981 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:07:10,981 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:07:11,039 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:07:11,045 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 [2021-11-12 23:07:11,046 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:07:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 1447 states, 1034 states have (on average 1.3375241779497098) internal successors, (1383), 1049 states have internal predecessors, (1383), 330 states have call successors, (330), 82 states have call predecessors, (330), 81 states have return successors, (322), 322 states have call predecessors, (322), 322 states have call successors, (322) [2021-11-12 23:07:11,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 23:07:11,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:11,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:11,144 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:11,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:11,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1676759204, now seen corresponding path program 1 times [2021-11-12 23:07:11,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:11,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156953795] [2021-11-12 23:07:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:11,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:11,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:11,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:11,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:07:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:18,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 4251 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:07:18,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:07:19,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:07:20,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:20,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156953795] [2021-11-12 23:07:20,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156953795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:20,413 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:20,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:07:20,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868950105] [2021-11-12 23:07:20,416 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:20,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:07:20,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:07:20,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:07:20,453 INFO L87 Difference]: Start difference. First operand has 1447 states, 1034 states have (on average 1.3375241779497098) internal successors, (1383), 1049 states have internal predecessors, (1383), 330 states have call successors, (330), 82 states have call predecessors, (330), 81 states have return successors, (322), 322 states have call predecessors, (322), 322 states have call successors, (322) Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 23:07:21,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:21,198 INFO L93 Difference]: Finished difference Result 2898 states and 4152 transitions. [2021-11-12 23:07:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:07:21,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 130 [2021-11-12 23:07:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:21,225 INFO L225 Difference]: With dead ends: 2898 [2021-11-12 23:07:21,225 INFO L226 Difference]: Without dead ends: 1432 [2021-11-12 23:07:21,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:07:21,240 INFO L933 BasicCegarLoop]: 2027 mSDtfsCounter, 6 mSDsluCounter, 6070 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 365.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8097 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.85ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 383.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:21,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 8097 Invalid, 40 Unknown, 0 Unchecked, 37.85ms Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 383.76ms Time] [2021-11-12 23:07:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-11-12 23:07:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1432. [2021-11-12 23:07:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1030 states have (on average 1.329126213592233) internal successors, (1369), 1035 states have internal predecessors, (1369), 320 states have call successors, (320), 82 states have call predecessors, (320), 81 states have return successors, (319), 319 states have call predecessors, (319), 319 states have call successors, (319) [2021-11-12 23:07:21,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2008 transitions. [2021-11-12 23:07:21,399 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2008 transitions. Word has length 130 [2021-11-12 23:07:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:21,400 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2008 transitions. [2021-11-12 23:07:21,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 23:07:21,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2008 transitions. [2021-11-12 23:07:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 23:07:21,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:21,413 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] [2021-11-12 23:07:21,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:07:21,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:21,635 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:21,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:21,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1101806108, now seen corresponding path program 1 times [2021-11-12 23:07:21,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:21,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768292861] [2021-11-12 23:07:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:21,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:21,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:21,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:21,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:07:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:28,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 4261 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:07:28,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:07:29,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:07:31,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:31,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768292861] [2021-11-12 23:07:31,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768292861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:07:31,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [197389006] [2021-11-12 23:07:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:31,227 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:31,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:07:31,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:07:31,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-12 23:07:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:34,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 4261 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:34,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:07:34,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:07:35,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [197389006] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:35,411 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:35,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:07:35,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862909631] [2021-11-12 23:07:35,412 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:35,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:35,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:35,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:35,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:07:35,415 INFO L87 Difference]: Start difference. First operand 1432 states and 2008 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 23:07:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:37,872 INFO L93 Difference]: Finished difference Result 4094 states and 5726 transitions. [2021-11-12 23:07:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:37,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 132 [2021-11-12 23:07:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:37,899 INFO L225 Difference]: With dead ends: 4094 [2021-11-12 23:07:37,900 INFO L226 Difference]: Without dead ends: 2701 [2021-11-12 23:07:37,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:07:37,910 INFO L933 BasicCegarLoop]: 2273 mSDtfsCounter, 1802 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2194.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 4204 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.11ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2311.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:37,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1802 Valid, 4204 Invalid, 23 Unknown, 0 Unchecked, 17.11ms Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 2311.86ms Time] [2021-11-12 23:07:37,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-11-12 23:07:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2698. [2021-11-12 23:07:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2698 states, 1948 states have (on average 1.3311088295687885) internal successors, (2593), 1958 states have internal predecessors, (2593), 589 states have call successors, (589), 161 states have call predecessors, (589), 160 states have return successors, (588), 588 states have call predecessors, (588), 588 states have call successors, (588) [2021-11-12 23:07:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2698 states to 2698 states and 3770 transitions. [2021-11-12 23:07:38,146 INFO L78 Accepts]: Start accepts. Automaton has 2698 states and 3770 transitions. Word has length 132 [2021-11-12 23:07:38,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:38,147 INFO L470 AbstractCegarLoop]: Abstraction has 2698 states and 3770 transitions. [2021-11-12 23:07:38,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 23:07:38,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2698 states and 3770 transitions. [2021-11-12 23:07:38,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 23:07:38,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:38,153 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] [2021-11-12 23:07:38,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:38,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:38,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:38,572 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:38,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:38,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2096693324, now seen corresponding path program 1 times [2021-11-12 23:07:38,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:38,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181887415] [2021-11-12 23:07:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:38,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:38,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:38,586 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:38,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:07:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 4283 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:07:45,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:07:46,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:07:47,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:47,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181887415] [2021-11-12 23:07:47,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181887415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:07:47,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [100708460] [2021-11-12 23:07:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:47,904 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:47,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:07:47,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:07:47,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 23:07:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 4283 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:07:50,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:07:51,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:07:51,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [100708460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:51,785 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:07:51,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:07:51,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712344031] [2021-11-12 23:07:51,785 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:51,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:51,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:51,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:07:51,787 INFO L87 Difference]: Start difference. First operand 2698 states and 3770 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:07:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:54,399 INFO L93 Difference]: Finished difference Result 7107 states and 9867 transitions. [2021-11-12 23:07:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 132 [2021-11-12 23:07:54,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:54,435 INFO L225 Difference]: With dead ends: 7107 [2021-11-12 23:07:54,435 INFO L226 Difference]: Without dead ends: 4448 [2021-11-12 23:07:54,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:07:54,450 INFO L933 BasicCegarLoop]: 2355 mSDtfsCounter, 1322 mSDsluCounter, 1868 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2313.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 4223 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.11ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2429.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:54,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 4223 Invalid, 86 Unknown, 0 Unchecked, 12.11ms Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 2429.92ms Time] [2021-11-12 23:07:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2021-11-12 23:07:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 4443. [2021-11-12 23:07:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 3183 states have (on average 1.3166823751178134) internal successors, (4191), 3202 states have internal predecessors, (4191), 978 states have call successors, (978), 282 states have call predecessors, (978), 281 states have return successors, (977), 976 states have call predecessors, (977), 977 states have call successors, (977) [2021-11-12 23:07:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 6146 transitions. [2021-11-12 23:07:54,668 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 6146 transitions. Word has length 132 [2021-11-12 23:07:54,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:54,669 INFO L470 AbstractCegarLoop]: Abstraction has 4443 states and 6146 transitions. [2021-11-12 23:07:54,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:07:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 6146 transitions. [2021-11-12 23:07:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:07:54,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:54,673 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, 1] [2021-11-12 23:07:54,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:54,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:55,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:55,095 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1259089564, now seen corresponding path program 1 times [2021-11-12 23:07:55,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:55,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626616457] [2021-11-12 23:07:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:55,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:55,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:55,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:55,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:08:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:01,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 4335 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:08:01,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:08:02,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-12 23:08:04,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:04,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626616457] [2021-11-12 23:08:04,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626616457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:04,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [434559217] [2021-11-12 23:08:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:04,261 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:04,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:08:04,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:08:04,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 23:08:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:06,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 4335 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:08:06,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:08:07,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:08:08,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [434559217] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:08,213 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:08:08,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:08:08,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541864120] [2021-11-12 23:08:08,214 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:08,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:08,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:08,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:08,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:08:08,215 INFO L87 Difference]: Start difference. First operand 4443 states and 6146 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:08:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:09,798 INFO L93 Difference]: Finished difference Result 10742 states and 14830 transitions. [2021-11-12 23:08:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:09,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 136 [2021-11-12 23:08:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:09,851 INFO L225 Difference]: With dead ends: 10742 [2021-11-12 23:08:09,852 INFO L226 Difference]: Without dead ends: 6336 [2021-11-12 23:08:09,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:08:09,872 INFO L933 BasicCegarLoop]: 2178 mSDtfsCounter, 1160 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1322.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 4109 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.03ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1405.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:09,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1160 Valid, 4109 Invalid, 23 Unknown, 0 Unchecked, 10.03ms Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 1405.34ms Time] [2021-11-12 23:08:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-11-12 23:08:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 6329. [2021-11-12 23:08:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6329 states, 4587 states have (on average 1.3250490516677567) internal successors, (6078), 4611 states have internal predecessors, (6078), 1325 states have call successors, (1325), 417 states have call predecessors, (1325), 416 states have return successors, (1324), 1322 states have call predecessors, (1324), 1324 states have call successors, (1324) [2021-11-12 23:08:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 8727 transitions. [2021-11-12 23:08:10,190 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 8727 transitions. Word has length 136 [2021-11-12 23:08:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:10,191 INFO L470 AbstractCegarLoop]: Abstraction has 6329 states and 8727 transitions. [2021-11-12 23:08:10,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 23:08:10,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 8727 transitions. [2021-11-12 23:08:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 23:08:10,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:10,203 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 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] [2021-11-12 23:08:10,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:10,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:10,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:10,604 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1036264898, now seen corresponding path program 1 times [2021-11-12 23:08:10,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:10,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160778571] [2021-11-12 23:08:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:10,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:10,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:10,616 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:10,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:08:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:17,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 4399 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:08:17,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-12 23:08:18,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 23:08:20,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:20,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160778571] [2021-11-12 23:08:20,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160778571] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:20,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1414679263] [2021-11-12 23:08:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:20,475 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:20,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:08:20,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:08:20,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 23:08:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 4399 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:08:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-12 23:08:26,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-12 23:08:28,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1414679263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:28,519 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:08:28,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:08:28,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352521849] [2021-11-12 23:08:28,520 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:28,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:28,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:08:28,522 INFO L87 Difference]: Start difference. First operand 6329 states and 8727 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-12 23:08:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:28,711 INFO L93 Difference]: Finished difference Result 6574 states and 8985 transitions. [2021-11-12 23:08:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 184 [2021-11-12 23:08:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:28,760 INFO L225 Difference]: With dead ends: 6574 [2021-11-12 23:08:28,760 INFO L226 Difference]: Without dead ends: 6571 [2021-11-12 23:08:28,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:08:28,766 INFO L933 BasicCegarLoop]: 2032 mSDtfsCounter, 1751 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1751 SdHoareTripleChecker+Valid, 2222 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.03ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:28,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1751 Valid, 2222 Invalid, 5 Unknown, 0 Unchecked, 6.03ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 48.64ms Time] [2021-11-12 23:08:28,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6571 states. [2021-11-12 23:08:29,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6571 to 6571. [2021-11-12 23:08:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6571 states, 4750 states have (on average 1.3193684210526315) internal successors, (6267), 4774 states have internal predecessors, (6267), 1355 states have call successors, (1355), 466 states have call predecessors, (1355), 465 states have return successors, (1354), 1352 states have call predecessors, (1354), 1354 states have call successors, (1354) [2021-11-12 23:08:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6571 states to 6571 states and 8976 transitions. [2021-11-12 23:08:29,092 INFO L78 Accepts]: Start accepts. Automaton has 6571 states and 8976 transitions. Word has length 184 [2021-11-12 23:08:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:29,092 INFO L470 AbstractCegarLoop]: Abstraction has 6571 states and 8976 transitions. [2021-11-12 23:08:29,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-12 23:08:29,094 INFO L276 IsEmpty]: Start isEmpty. Operand 6571 states and 8976 transitions. [2021-11-12 23:08:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 23:08:29,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:29,107 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 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] [2021-11-12 23:08:29,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:29,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:29,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:29,523 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:29,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:29,524 INFO L85 PathProgramCache]: Analyzing trace with hash -41377682, now seen corresponding path program 1 times [2021-11-12 23:08:29,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:29,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076556921] [2021-11-12 23:08:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:29,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:29,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:29,531 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:29,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:08:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:36,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 4421 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:08:36,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-12 23:08:38,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-12 23:08:39,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:39,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076556921] [2021-11-12 23:08:39,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076556921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:39,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1051615127] [2021-11-12 23:08:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:39,925 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:39,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:08:39,926 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:08:39,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 23:08:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 4421 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:08:42,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-12 23:08:44,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-11-12 23:08:45,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1051615127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:45,092 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:08:45,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 14 [2021-11-12 23:08:45,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037274367] [2021-11-12 23:08:45,092 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:45,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:08:45,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:45,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:08:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:08:45,094 INFO L87 Difference]: Start difference. First operand 6571 states and 8976 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:08:47,566 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:48,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:48,178 INFO L93 Difference]: Finished difference Result 13120 states and 17920 transitions. [2021-11-12 23:08:48,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:48,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 184 [2021-11-12 23:08:48,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:48,240 INFO L225 Difference]: With dead ends: 13120 [2021-11-12 23:08:48,240 INFO L226 Difference]: Without dead ends: 6565 [2021-11-12 23:08:48,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:08:48,268 INFO L933 BasicCegarLoop]: 1998 mSDtfsCounter, 4 mSDsluCounter, 5983 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2623.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 7981 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.65ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2713.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:48,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 7981 Invalid, 19 Unknown, 0 Unchecked, 14.65ms Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 2713.28ms Time] [2021-11-12 23:08:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6565 states. [2021-11-12 23:08:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6565 to 6515. [2021-11-12 23:08:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6515 states, 4708 states have (on average 1.31839422259983) internal successors, (6207), 4734 states have internal predecessors, (6207), 1347 states have call successors, (1347), 460 states have call predecessors, (1347), 459 states have return successors, (1346), 1342 states have call predecessors, (1346), 1346 states have call successors, (1346) [2021-11-12 23:08:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6515 states to 6515 states and 8900 transitions. [2021-11-12 23:08:48,554 INFO L78 Accepts]: Start accepts. Automaton has 6515 states and 8900 transitions. Word has length 184 [2021-11-12 23:08:48,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:48,555 INFO L470 AbstractCegarLoop]: Abstraction has 6515 states and 8900 transitions. [2021-11-12 23:08:48,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:08:48,556 INFO L276 IsEmpty]: Start isEmpty. Operand 6515 states and 8900 transitions. [2021-11-12 23:08:48,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-12 23:08:48,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:48,570 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 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] [2021-11-12 23:08:48,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:48,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-12 23:08:48,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:48,983 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:48,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1217390188, now seen corresponding path program 1 times [2021-11-12 23:08:48,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:48,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58106535] [2021-11-12 23:08:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:48,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:48,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:48,990 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:48,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:08:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:56,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 4510 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:08:56,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-12 23:08:57,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-12 23:08:59,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:59,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58106535] [2021-11-12 23:08:59,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58106535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:08:59,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [800870732] [2021-11-12 23:08:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:59,625 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:59,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:08:59,626 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:08:59,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 23:09:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:02,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 4510 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:09:02,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-12 23:09:04,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-11-12 23:09:04,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [800870732] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:04,930 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:09:04,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 13 [2021-11-12 23:09:04,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550586441] [2021-11-12 23:09:04,931 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:04,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:09:04,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:09:04,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:09:04,932 INFO L87 Difference]: Start difference. First operand 6515 states and 8900 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:09:07,413 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:08,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:08,245 INFO L93 Difference]: Finished difference Result 12958 states and 17700 transitions. [2021-11-12 23:09:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:09:08,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 192 [2021-11-12 23:09:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:08,285 INFO L225 Difference]: With dead ends: 12958 [2021-11-12 23:09:08,285 INFO L226 Difference]: Without dead ends: 6449 [2021-11-12 23:09:08,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:09:08,309 INFO L933 BasicCegarLoop]: 1995 mSDtfsCounter, 5 mSDsluCounter, 5970 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2665.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 7965 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.23ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2772.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:08,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 7965 Invalid, 20 Unknown, 0 Unchecked, 12.23ms Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 2772.87ms Time] [2021-11-12 23:09:08,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2021-11-12 23:09:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 6421. [2021-11-12 23:09:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6421 states, 4640 states have (on average 1.3196120689655173) internal successors, (6123), 4669 states have internal predecessors, (6123), 1329 states have call successors, (1329), 452 states have call predecessors, (1329), 451 states have return successors, (1328), 1321 states have call predecessors, (1328), 1328 states have call successors, (1328) [2021-11-12 23:09:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6421 states to 6421 states and 8780 transitions. [2021-11-12 23:09:08,569 INFO L78 Accepts]: Start accepts. Automaton has 6421 states and 8780 transitions. Word has length 192 [2021-11-12 23:09:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:08,570 INFO L470 AbstractCegarLoop]: Abstraction has 6421 states and 8780 transitions. [2021-11-12 23:09:08,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:09:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6421 states and 8780 transitions. [2021-11-12 23:09:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-12 23:09:08,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:08,583 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:08,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:08,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:08,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:09,000 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:09,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1206900752, now seen corresponding path program 1 times [2021-11-12 23:09:09,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:09,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016490637] [2021-11-12 23:09:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:09,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:09,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:09,007 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:09,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:09:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:16,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 4552 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:09:16,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-12 23:09:18,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-12 23:09:19,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:19,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016490637] [2021-11-12 23:09:19,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016490637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:09:19,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [501142696] [2021-11-12 23:09:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:19,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:19,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:09:19,705 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:09:19,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 23:09:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:22,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 4552 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:09:22,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2021-11-12 23:09:23,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-11-12 23:09:24,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [501142696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:24,432 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:09:24,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-12 23:09:24,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660029705] [2021-11-12 23:09:24,433 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:24,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:09:24,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:24,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:09:24,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:09:24,434 INFO L87 Difference]: Start difference. First operand 6421 states and 8780 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:09:26,945 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:35,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:35,647 INFO L93 Difference]: Finished difference Result 18920 states and 25938 transitions. [2021-11-12 23:09:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:09:35,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 197 [2021-11-12 23:09:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:35,707 INFO L225 Difference]: With dead ends: 18920 [2021-11-12 23:09:35,707 INFO L226 Difference]: Without dead ends: 12547 [2021-11-12 23:09:35,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:09:35,736 INFO L933 BasicCegarLoop]: 3019 mSDtfsCounter, 3087 mSDsluCounter, 4082 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 82 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10279.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3087 SdHoareTripleChecker+Valid, 7101 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.64ms SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10732.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:35,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3087 Valid, 7101 Invalid, 672 Unknown, 0 Unchecked, 18.64ms Time], IncrementalHoareTripleChecker [82 Valid, 589 Invalid, 1 Unknown, 0 Unchecked, 10732.85ms Time] [2021-11-12 23:09:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12547 states. [2021-11-12 23:09:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12547 to 12537. [2021-11-12 23:09:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12537 states, 9153 states have (on average 1.3177100404239048) internal successors, (12061), 9210 states have internal predecessors, (12061), 2494 states have call successors, (2494), 890 states have call predecessors, (2494), 889 states have return successors, (2493), 2478 states have call predecessors, (2493), 2493 states have call successors, (2493) [2021-11-12 23:09:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12537 states to 12537 states and 17048 transitions. [2021-11-12 23:09:36,265 INFO L78 Accepts]: Start accepts. Automaton has 12537 states and 17048 transitions. Word has length 197 [2021-11-12 23:09:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:36,266 INFO L470 AbstractCegarLoop]: Abstraction has 12537 states and 17048 transitions. [2021-11-12 23:09:36,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:09:36,267 INFO L276 IsEmpty]: Start isEmpty. Operand 12537 states and 17048 transitions. [2021-11-12 23:09:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-12 23:09:36,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:36,281 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:36,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:36,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:36,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:36,699 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:36,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1145412212, now seen corresponding path program 1 times [2021-11-12 23:09:36,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:36,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443453502] [2021-11-12 23:09:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:36,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:36,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:36,706 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:36,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:09:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:44,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 4576 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:09:44,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-12 23:09:45,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-11-12 23:09:47,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:47,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443453502] [2021-11-12 23:09:47,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443453502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:09:47,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821519349] [2021-11-12 23:09:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:47,874 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:47,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:09:47,875 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:09:47,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 23:09:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:50,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 4576 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:09:50,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2021-11-12 23:09:52,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2021-11-12 23:09:53,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [821519349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:53,768 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:09:53,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-12 23:09:53,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624312858] [2021-11-12 23:09:53,769 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:53,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:09:53,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:53,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:09:53,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:09:53,770 INFO L87 Difference]: Start difference. First operand 12537 states and 17048 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-12 23:09:56,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:02,236 INFO L93 Difference]: Finished difference Result 33620 states and 45516 transitions. [2021-11-12 23:10:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:10:02,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 215 [2021-11-12 23:10:02,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:02,318 INFO L225 Difference]: With dead ends: 33620 [2021-11-12 23:10:02,319 INFO L226 Difference]: Without dead ends: 21143 [2021-11-12 23:10:02,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 846 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:10:02,356 INFO L933 BasicCegarLoop]: 2589 mSDtfsCounter, 3016 mSDsluCounter, 2526 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7580.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3016 SdHoareTripleChecker+Valid, 5115 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.68ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7946.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:02,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3016 Valid, 5115 Invalid, 470 Unknown, 0 Unchecked, 12.68ms Time], IncrementalHoareTripleChecker [26 Valid, 443 Invalid, 1 Unknown, 0 Unchecked, 7946.64ms Time] [2021-11-12 23:10:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21143 states. [2021-11-12 23:10:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21143 to 21009. [2021-11-12 23:10:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21009 states, 15521 states have (on average 1.3190516074995169) internal successors, (20473), 15606 states have internal predecessors, (20473), 3922 states have call successors, (3922), 1566 states have call predecessors, (3922), 1565 states have return successors, (3921), 3890 states have call predecessors, (3921), 3921 states have call successors, (3921) [2021-11-12 23:10:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21009 states to 21009 states and 28316 transitions. [2021-11-12 23:10:03,173 INFO L78 Accepts]: Start accepts. Automaton has 21009 states and 28316 transitions. Word has length 215 [2021-11-12 23:10:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:03,174 INFO L470 AbstractCegarLoop]: Abstraction has 21009 states and 28316 transitions. [2021-11-12 23:10:03,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-12 23:10:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 21009 states and 28316 transitions. [2021-11-12 23:10:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-12 23:10:03,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:03,196 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:03,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:03,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-12 23:10:03,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:03,613 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:03,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:03,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2138459709, now seen corresponding path program 1 times [2021-11-12 23:10:03,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:03,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671907832] [2021-11-12 23:10:03,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:03,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:03,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:03,622 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:03,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:10:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:11,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 4630 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:10:11,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-11-12 23:10:12,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-11-12 23:10:14,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:14,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671907832] [2021-11-12 23:10:14,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671907832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:10:14,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2042597983] [2021-11-12 23:10:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:14,680 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:10:14,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:10:14,681 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:10:14,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 23:10:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:17,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 4630 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:10:17,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2021-11-12 23:10:20,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-11-12 23:10:21,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2042597983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:21,625 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:10:21,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6, 6] total 15 [2021-11-12 23:10:21,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424834854] [2021-11-12 23:10:21,626 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:21,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:10:21,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:21,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:10:21,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:10:21,628 INFO L87 Difference]: Start difference. First operand 21009 states and 28316 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 3 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-12 23:10:25,339 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:26,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:26,469 INFO L93 Difference]: Finished difference Result 42057 states and 56683 transitions. [2021-11-12 23:10:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:10:26,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 3 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) Word has length 219 [2021-11-12 23:10:26,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:26,556 INFO L225 Difference]: With dead ends: 42057 [2021-11-12 23:10:26,557 INFO L226 Difference]: Without dead ends: 21091 [2021-11-12 23:10:26,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 860 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:10:26,609 INFO L933 BasicCegarLoop]: 1973 mSDtfsCounter, 1053 mSDsluCounter, 6933 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 88 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3435.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 8906 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.06ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3588.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:26,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1232 Valid, 8906 Invalid, 167 Unknown, 0 Unchecked, 16.06ms Time], IncrementalHoareTripleChecker [88 Valid, 78 Invalid, 1 Unknown, 0 Unchecked, 3588.62ms Time] [2021-11-12 23:10:26,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21091 states. [2021-11-12 23:10:27,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21091 to 21009. [2021-11-12 23:10:27,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21009 states, 15521 states have (on average 1.3185361767927324) internal successors, (20465), 15606 states have internal predecessors, (20465), 3922 states have call successors, (3922), 1566 states have call predecessors, (3922), 1565 states have return successors, (3921), 3890 states have call predecessors, (3921), 3921 states have call successors, (3921) [2021-11-12 23:10:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21009 states to 21009 states and 28308 transitions. [2021-11-12 23:10:27,642 INFO L78 Accepts]: Start accepts. Automaton has 21009 states and 28308 transitions. Word has length 219 [2021-11-12 23:10:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:27,643 INFO L470 AbstractCegarLoop]: Abstraction has 21009 states and 28308 transitions. [2021-11-12 23:10:27,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 3 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-12 23:10:27,644 INFO L276 IsEmpty]: Start isEmpty. Operand 21009 states and 28308 transitions. [2021-11-12 23:10:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-12 23:10:27,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:27,667 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:27,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:27,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:28,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:28,084 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:28,084 INFO L85 PathProgramCache]: Analyzing trace with hash 232056443, now seen corresponding path program 1 times [2021-11-12 23:10:28,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:28,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617482909] [2021-11-12 23:10:28,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:28,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:28,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:28,091 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:28,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:10:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:35,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 4630 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:10:35,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-11-12 23:10:37,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-11-12 23:10:40,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:40,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617482909] [2021-11-12 23:10:40,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617482909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:10:40,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1349578148] [2021-11-12 23:10:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:40,139 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:10:40,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:10:40,140 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:10:40,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 23:10:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:43,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 4630 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:10:43,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2021-11-12 23:10:47,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2021-11-12 23:10:51,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1349578148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:51,969 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:10:51,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [6, 6] total 23 [2021-11-12 23:10:51,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737393379] [2021-11-12 23:10:51,970 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:51,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:10:51,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:51,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:10:51,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:10:51,972 INFO L87 Difference]: Start difference. First operand 21009 states and 28308 transitions. Second operand has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 13 states have internal predecessors, (142), 5 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (49), 7 states have call predecessors, (49), 5 states have call successors, (49) [2021-11-12 23:10:58,982 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:11:01,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:11:03,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:03,790 INFO L93 Difference]: Finished difference Result 42256 states and 56978 transitions. [2021-11-12 23:11:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:11:03,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 13 states have internal predecessors, (142), 5 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (49), 7 states have call predecessors, (49), 5 states have call successors, (49) Word has length 219 [2021-11-12 23:11:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:03,902 INFO L225 Difference]: With dead ends: 42256 [2021-11-12 23:11:03,903 INFO L226 Difference]: Without dead ends: 21163 [2021-11-12 23:11:03,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 852 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 23:11:03,952 INFO L933 BasicCegarLoop]: 1970 mSDtfsCounter, 966 mSDsluCounter, 14761 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 48 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7011.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 16731 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.84ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7313.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:03,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 16731 Invalid, 228 Unknown, 0 Unchecked, 22.84ms Time], IncrementalHoareTripleChecker [48 Valid, 178 Invalid, 2 Unknown, 0 Unchecked, 7313.67ms Time] [2021-11-12 23:11:03,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21163 states. [2021-11-12 23:11:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21163 to 21065. [2021-11-12 23:11:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21065 states, 15549 states have (on average 1.317705318670011) internal successors, (20489), 15662 states have internal predecessors, (20489), 3922 states have call successors, (3922), 1566 states have call predecessors, (3922), 1593 states have return successors, (4001), 3890 states have call predecessors, (4001), 3921 states have call successors, (4001) [2021-11-12 23:11:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21065 states to 21065 states and 28412 transitions. [2021-11-12 23:11:05,055 INFO L78 Accepts]: Start accepts. Automaton has 21065 states and 28412 transitions. Word has length 219 [2021-11-12 23:11:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:05,055 INFO L470 AbstractCegarLoop]: Abstraction has 21065 states and 28412 transitions. [2021-11-12 23:11:05,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 13 states have internal predecessors, (142), 5 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (49), 7 states have call predecessors, (49), 5 states have call successors, (49) [2021-11-12 23:11:05,056 INFO L276 IsEmpty]: Start isEmpty. Operand 21065 states and 28412 transitions. [2021-11-12 23:11:05,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-12 23:11:05,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:05,081 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:11:05,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:05,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:05,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:05,501 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:05,501 INFO L85 PathProgramCache]: Analyzing trace with hash 406110663, now seen corresponding path program 1 times [2021-11-12 23:11:05,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:05,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958186031] [2021-11-12 23:11:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:05,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:05,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:05,517 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:05,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:11:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:13,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 4671 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:11:13,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-12 23:11:16,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2021-11-12 23:11:18,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:18,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958186031] [2021-11-12 23:11:18,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958186031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:11:18,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1971931433] [2021-11-12 23:11:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:18,986 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:11:18,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:11:18,987 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:11:18,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 23:11:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:22,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 4671 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:11:22,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2021-11-12 23:11:23,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2021-11-12 23:11:24,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1971931433] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:24,724 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:11:24,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 16 [2021-11-12 23:11:24,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969354367] [2021-11-12 23:11:24,725 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:24,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:11:24,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:24,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:11:24,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:11:24,726 INFO L87 Difference]: Start difference. First operand 21065 states and 28412 transitions. Second operand has 8 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 4 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 1 states have call predecessors, (28), 1 states have call successors, (28) [2021-11-12 23:11:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:25,689 INFO L93 Difference]: Finished difference Result 21100 states and 28446 transitions. [2021-11-12 23:11:25,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:11:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 4 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 1 states have call predecessors, (28), 1 states have call successors, (28) Word has length 239 [2021-11-12 23:11:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:25,776 INFO L225 Difference]: With dead ends: 21100 [2021-11-12 23:11:25,776 INFO L226 Difference]: Without dead ends: 21097 [2021-11-12 23:11:25,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 938 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:11:25,789 INFO L933 BasicCegarLoop]: 1982 mSDtfsCounter, 20 mSDsluCounter, 7897 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 353.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 9879 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.71ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 360.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:25,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 9879 Invalid, 29 Unknown, 0 Unchecked, 8.71ms Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 360.20ms Time] [2021-11-12 23:11:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21097 states. [2021-11-12 23:11:26,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21097 to 21097. [2021-11-12 23:11:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21097 states, 15573 states have (on average 1.3168304116098375) internal successors, (20507), 15686 states have internal predecessors, (20507), 3922 states have call successors, (3922), 1574 states have call predecessors, (3922), 1601 states have return successors, (4001), 3890 states have call predecessors, (4001), 3921 states have call successors, (4001) [2021-11-12 23:11:26,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21097 states to 21097 states and 28430 transitions. [2021-11-12 23:11:26,626 INFO L78 Accepts]: Start accepts. Automaton has 21097 states and 28430 transitions. Word has length 239 [2021-11-12 23:11:26,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:26,627 INFO L470 AbstractCegarLoop]: Abstraction has 21097 states and 28430 transitions. [2021-11-12 23:11:26,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 4 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 1 states have call predecessors, (28), 1 states have call successors, (28) [2021-11-12 23:11:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 21097 states and 28430 transitions. [2021-11-12 23:11:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-12 23:11:26,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:26,687 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:11:26,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:26,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:27,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:27,104 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash 161807236, now seen corresponding path program 1 times [2021-11-12 23:11:27,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:27,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54009954] [2021-11-12 23:11:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:27,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:27,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:27,115 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:27,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:11:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:34,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 4876 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:11:34,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-11-12 23:11:38,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2021-11-12 23:11:42,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:42,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54009954] [2021-11-12 23:11:42,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54009954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:11:42,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1998037253] [2021-11-12 23:11:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:42,029 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:11:42,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:11:42,034 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:11:42,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 23:11:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:45,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 4876 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:11:45,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2021-11-12 23:11:47,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2021-11-12 23:11:49,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1998037253] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:49,234 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:11:49,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 14 [2021-11-12 23:11:49,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092014794] [2021-11-12 23:11:49,235 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:49,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:11:49,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:49,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:11:49,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:11:49,236 INFO L87 Difference]: Start difference. First operand 21097 states and 28430 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-12 23:11:51,715 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:11:53,735 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:12:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:11,276 INFO L93 Difference]: Finished difference Result 58108 states and 78946 transitions. [2021-11-12 23:12:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:12:11,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 300 [2021-11-12 23:12:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:11,396 INFO L225 Difference]: With dead ends: 58108 [2021-11-12 23:12:11,397 INFO L226 Difference]: Without dead ends: 37071 [2021-11-12 23:12:11,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1202 GetRequests, 1186 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:12:11,441 INFO L933 BasicCegarLoop]: 3848 mSDtfsCounter, 4875 mSDsluCounter, 9324 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 392 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19383.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4875 SdHoareTripleChecker+Valid, 13172 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.84ms SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19977.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:11,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4875 Valid, 13172 Invalid, 1242 Unknown, 0 Unchecked, 30.84ms Time], IncrementalHoareTripleChecker [392 Valid, 848 Invalid, 2 Unknown, 0 Unchecked, 19977.66ms Time] [2021-11-12 23:12:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37071 states. [2021-11-12 23:12:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37071 to 21113. [2021-11-12 23:12:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21113 states, 15589 states have (on average 1.3165052280454166) internal successors, (20523), 15702 states have internal predecessors, (20523), 3922 states have call successors, (3922), 1574 states have call predecessors, (3922), 1601 states have return successors, (4001), 3890 states have call predecessors, (4001), 3921 states have call successors, (4001) [2021-11-12 23:12:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21113 states to 21113 states and 28446 transitions. [2021-11-12 23:12:12,607 INFO L78 Accepts]: Start accepts. Automaton has 21113 states and 28446 transitions. Word has length 300 [2021-11-12 23:12:12,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:12,608 INFO L470 AbstractCegarLoop]: Abstraction has 21113 states and 28446 transitions. [2021-11-12 23:12:12,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-12 23:12:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 21113 states and 28446 transitions. [2021-11-12 23:12:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-12 23:12:12,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:12,657 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:12,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:12:12,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:12:13,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:12:13,080 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:12:13,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:13,080 INFO L85 PathProgramCache]: Analyzing trace with hash 884362871, now seen corresponding path program 1 times [2021-11-12 23:12:13,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:12:13,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19335257] [2021-11-12 23:12:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:13,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:12:13,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:12:13,093 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:12:13,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:12:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:21,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 4904 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:12:21,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:12:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 224 proven. 3 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-12 23:12:25,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:12:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-11-12 23:12:29,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:12:29,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19335257] [2021-11-12 23:12:29,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19335257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:12:29,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [823375518] [2021-11-12 23:12:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:29,646 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:12:29,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:12:29,646 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:12:29,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-12 23:12:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:32,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 4904 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:12:32,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:12:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2021-11-12 23:12:36,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:12:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2021-11-12 23:12:38,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [823375518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:38,952 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:12:38,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 16 [2021-11-12 23:12:38,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128769233] [2021-11-12 23:12:38,952 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:38,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:12:38,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:12:38,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:12:38,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:12:38,954 INFO L87 Difference]: Start difference. First operand 21113 states and 28446 transitions. Second operand has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 4 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-12 23:12:41,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:12:43,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:13:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:17,811 INFO L93 Difference]: Finished difference Result 65942 states and 91022 transitions. [2021-11-12 23:13:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:13:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 4 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) Word has length 320 [2021-11-12 23:13:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:17,936 INFO L225 Difference]: With dead ends: 65942 [2021-11-12 23:13:17,936 INFO L226 Difference]: Without dead ends: 44889 [2021-11-12 23:13:17,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1287 GetRequests, 1265 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:13:17,972 INFO L933 BasicCegarLoop]: 5219 mSDtfsCounter, 5907 mSDsluCounter, 18974 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 1038 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33711.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6080 SdHoareTripleChecker+Valid, 24193 SdHoareTripleChecker+Invalid, 2534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 54.59ms SdHoareTripleChecker+Time, 1038 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34644.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:17,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6080 Valid, 24193 Invalid, 2534 Unknown, 0 Unchecked, 54.59ms Time], IncrementalHoareTripleChecker [1038 Valid, 1494 Invalid, 2 Unknown, 0 Unchecked, 34644.62ms Time] [2021-11-12 23:13:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44889 states. [2021-11-12 23:13:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44889 to 21289. [2021-11-12 23:13:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21289 states, 15693 states have (on average 1.315427260562034) internal successors, (20643), 15806 states have internal predecessors, (20643), 3994 states have call successors, (3994), 1574 states have call predecessors, (3994), 1601 states have return successors, (4073), 3962 states have call predecessors, (4073), 3993 states have call successors, (4073) [2021-11-12 23:13:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21289 states to 21289 states and 28710 transitions. [2021-11-12 23:13:19,057 INFO L78 Accepts]: Start accepts. Automaton has 21289 states and 28710 transitions. Word has length 320 [2021-11-12 23:13:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:19,058 INFO L470 AbstractCegarLoop]: Abstraction has 21289 states and 28710 transitions. [2021-11-12 23:13:19,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 4 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-12 23:13:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 21289 states and 28710 transitions. [2021-11-12 23:13:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-11-12 23:13:19,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:19,096 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:19,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:13:19,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:13:19,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:13:19,499 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:19,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2066422350, now seen corresponding path program 1 times [2021-11-12 23:13:19,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:13:19,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581240818] [2021-11-12 23:13:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:19,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:13:19,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:13:19,509 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:13:19,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:13:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:28,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 5667 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:13:28,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-11-12 23:13:35,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2021-11-12 23:13:40,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:13:40,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581240818] [2021-11-12 23:13:40,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581240818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:13:40,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2002751719] [2021-11-12 23:13:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:40,484 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:13:40,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:13:40,485 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:13:40,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 23:13:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:43,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 5667 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:13:43,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 738 trivial. 0 not checked. [2021-11-12 23:13:46,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2021-11-12 23:13:48,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2002751719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:48,734 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:13:48,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:13:48,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832912961] [2021-11-12 23:13:48,735 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:48,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:13:48,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:13:48,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:13:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:13:48,737 INFO L87 Difference]: Start difference. First operand 21289 states and 28710 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 2 states have call successors, (88), 2 states have call predecessors, (88), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2021-11-12 23:13:50,774 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:13:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:51,355 INFO L93 Difference]: Finished difference Result 42526 states and 57384 transitions. [2021-11-12 23:13:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:13:51,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 2 states have call successors, (88), 2 states have call predecessors, (88), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) Word has length 532 [2021-11-12 23:13:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:51,408 INFO L225 Difference]: With dead ends: 42526 [2021-11-12 23:13:51,408 INFO L226 Difference]: Without dead ends: 21297 [2021-11-12 23:13:51,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2124 GetRequests, 2115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:13:51,444 INFO L933 BasicCegarLoop]: 1981 mSDtfsCounter, 0 mSDsluCounter, 1977 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1897.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3958 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.67ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1921.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:51,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3958 Invalid, 5 Unknown, 0 Unchecked, 3.67ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 1921.34ms Time] [2021-11-12 23:13:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21297 states. [2021-11-12 23:13:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21297 to 21297. [2021-11-12 23:13:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21297 states, 15701 states have (on average 1.315266543532259) internal successors, (20651), 15814 states have internal predecessors, (20651), 3994 states have call successors, (3994), 1574 states have call predecessors, (3994), 1601 states have return successors, (4073), 3962 states have call predecessors, (4073), 3993 states have call successors, (4073) [2021-11-12 23:13:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21297 states to 21297 states and 28718 transitions. [2021-11-12 23:13:52,648 INFO L78 Accepts]: Start accepts. Automaton has 21297 states and 28718 transitions. Word has length 532 [2021-11-12 23:13:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:52,650 INFO L470 AbstractCegarLoop]: Abstraction has 21297 states and 28718 transitions. [2021-11-12 23:13:52,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 2 states have call successors, (88), 2 states have call predecessors, (88), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2021-11-12 23:13:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 21297 states and 28718 transitions. [2021-11-12 23:13:52,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-11-12 23:13:52,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:52,696 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:52,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-12 23:13:52,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:13:53,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:13:53,097 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:53,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1728134800, now seen corresponding path program 1 times [2021-11-12 23:13:53,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:13:53,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485467511] [2021-11-12 23:13:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:53,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:13:53,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:13:53,105 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:13:53,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:14:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 5669 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:14:01,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-11-12 23:14:09,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2021-11-12 23:14:14,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:14,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485467511] [2021-11-12 23:14:14,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485467511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:14:14,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1704937246] [2021-11-12 23:14:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:14,412 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:14:14,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:14:14,413 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:14:14,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 23:14:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:17,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 5669 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:14:17,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2021-11-12 23:14:25,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2021-11-12 23:14:29,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1704937246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:29,188 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:14:29,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [6, 6] total 13 [2021-11-12 23:14:29,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923447695] [2021-11-12 23:14:29,189 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:29,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:14:29,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:29,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:14:29,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:14:29,191 INFO L87 Difference]: Start difference. First operand 21297 states and 28718 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 5 states have call successors, (134), 2 states have call predecessors, (134), 2 states have return successors, (131), 5 states have call predecessors, (131), 5 states have call successors, (131) [2021-11-12 23:14:30,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:30,714 INFO L93 Difference]: Finished difference Result 44276 states and 59994 transitions. [2021-11-12 23:14:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:14:30,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 5 states have call successors, (134), 2 states have call predecessors, (134), 2 states have return successors, (131), 5 states have call predecessors, (131), 5 states have call successors, (131) Word has length 532 [2021-11-12 23:14:30,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:30,777 INFO L225 Difference]: With dead ends: 44276 [2021-11-12 23:14:30,777 INFO L226 Difference]: Without dead ends: 23039 [2021-11-12 23:14:30,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2126 GetRequests, 2114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:14:30,816 INFO L933 BasicCegarLoop]: 2401 mSDtfsCounter, 1824 mSDsluCounter, 3025 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 417.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1989 SdHoareTripleChecker+Valid, 5426 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.55ms SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 481.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:30,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1989 Valid, 5426 Invalid, 294 Unknown, 0 Unchecked, 8.55ms Time], IncrementalHoareTripleChecker [283 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 481.59ms Time] [2021-11-12 23:14:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23039 states. [2021-11-12 23:14:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23039 to 21537. [2021-11-12 23:14:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21537 states, 15901 states have (on average 1.3163323061442675) internal successors, (20931), 16014 states have internal predecessors, (20931), 4034 states have call successors, (4034), 1574 states have call predecessors, (4034), 1601 states have return successors, (4113), 4002 states have call predecessors, (4113), 4033 states have call successors, (4113) [2021-11-12 23:14:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21537 states to 21537 states and 29078 transitions. [2021-11-12 23:14:31,710 INFO L78 Accepts]: Start accepts. Automaton has 21537 states and 29078 transitions. Word has length 532 [2021-11-12 23:14:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:31,710 INFO L470 AbstractCegarLoop]: Abstraction has 21537 states and 29078 transitions. [2021-11-12 23:14:31,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 5 states have call successors, (134), 2 states have call predecessors, (134), 2 states have return successors, (131), 5 states have call predecessors, (131), 5 states have call successors, (131) [2021-11-12 23:14:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 21537 states and 29078 transitions. [2021-11-12 23:14:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2021-11-12 23:14:31,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:31,860 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:31,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:32,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:32,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:14:32,283 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:32,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:32,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1503161800, now seen corresponding path program 1 times [2021-11-12 23:14:32,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:32,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785383793] [2021-11-12 23:14:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:32,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:32,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:32,291 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:32,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:14:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:41,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 5743 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:14:41,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2021-11-12 23:14:49,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-11-12 23:14:54,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:54,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785383793] [2021-11-12 23:14:54,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785383793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:14:54,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1000604618] [2021-11-12 23:14:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:54,659 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:14:54,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:14:54,660 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:14:54,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-12 23:14:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:57,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 5743 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:14:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2021-11-12 23:15:03,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2021-11-12 23:15:07,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1000604618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:07,317 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:15:07,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:15:07,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842197809] [2021-11-12 23:15:07,319 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:07,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:15:07,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:07,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:15:07,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:15:07,320 INFO L87 Difference]: Start difference. First operand 21537 states and 29078 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 3 states have call successors, (123), 2 states have call predecessors, (123), 2 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2021-11-12 23:15:09,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:09,881 INFO L93 Difference]: Finished difference Result 50586 states and 69794 transitions. [2021-11-12 23:15:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:15:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 3 states have call successors, (123), 2 states have call predecessors, (123), 2 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) Word has length 558 [2021-11-12 23:15:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:09,962 INFO L225 Difference]: With dead ends: 50586 [2021-11-12 23:15:09,962 INFO L226 Difference]: Without dead ends: 29109 [2021-11-12 23:15:10,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2228 GetRequests, 2219 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:15:10,003 INFO L933 BasicCegarLoop]: 2758 mSDtfsCounter, 661 mSDsluCounter, 1986 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1489.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 4744 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.14ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1520.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:10,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 4744 Invalid, 9 Unknown, 0 Unchecked, 6.14ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 1520.45ms Time] [2021-11-12 23:15:10,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29109 states. [2021-11-12 23:15:10,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29109 to 21537. [2021-11-12 23:15:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21537 states, 15901 states have (on average 1.3158291931325075) internal successors, (20923), 16014 states have internal predecessors, (20923), 4034 states have call successors, (4034), 1574 states have call predecessors, (4034), 1601 states have return successors, (4113), 4002 states have call predecessors, (4113), 4033 states have call successors, (4113) [2021-11-12 23:15:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21537 states to 21537 states and 29070 transitions. [2021-11-12 23:15:11,023 INFO L78 Accepts]: Start accepts. Automaton has 21537 states and 29070 transitions. Word has length 558 [2021-11-12 23:15:11,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:11,024 INFO L470 AbstractCegarLoop]: Abstraction has 21537 states and 29070 transitions. [2021-11-12 23:15:11,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 3 states have call successors, (123), 2 states have call predecessors, (123), 2 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2021-11-12 23:15:11,025 INFO L276 IsEmpty]: Start isEmpty. Operand 21537 states and 29070 transitions. [2021-11-12 23:15:11,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2021-11-12 23:15:11,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:11,059 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:11,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:11,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-12 23:15:11,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:11,462 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:11,462 INFO L85 PathProgramCache]: Analyzing trace with hash 170727883, now seen corresponding path program 1 times [2021-11-12 23:15:11,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:11,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047700617] [2021-11-12 23:15:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:11,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:11,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:11,470 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:11,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:15:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:20,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 5747 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:15:20,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2021-11-12 23:15:28,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2021-11-12 23:15:33,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:33,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047700617] [2021-11-12 23:15:33,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047700617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:15:33,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1249307020] [2021-11-12 23:15:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:33,630 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:15:33,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:15:33,655 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:15:33,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 23:15:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:37,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 5747 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:15:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2021-11-12 23:15:43,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 797 trivial. 0 not checked. [2021-11-12 23:15:46,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1249307020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:46,572 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:15:46,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 13 [2021-11-12 23:15:46,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959556830] [2021-11-12 23:15:46,574 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:46,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:15:46,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:46,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:15:46,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:15:46,575 INFO L87 Difference]: Start difference. First operand 21537 states and 29070 transitions. Second operand has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 2 states have call successors, (124), 2 states have call predecessors, (124), 2 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2021-11-12 23:15:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:52,132 INFO L93 Difference]: Finished difference Result 67330 states and 95678 transitions. [2021-11-12 23:15:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:15:52,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 2 states have call successors, (124), 2 states have call predecessors, (124), 2 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) Word has length 562 [2021-11-12 23:15:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:52,243 INFO L225 Difference]: With dead ends: 67330 [2021-11-12 23:15:52,243 INFO L226 Difference]: Without dead ends: 45853 [2021-11-12 23:15:52,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2249 GetRequests, 2235 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:15:52,280 INFO L933 BasicCegarLoop]: 3538 mSDtfsCounter, 3579 mSDsluCounter, 8912 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 837 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2563.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3741 SdHoareTripleChecker+Valid, 12450 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.94ms SdHoareTripleChecker+Time, 837 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2765.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:52,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3741 Valid, 12450 Invalid, 860 Unknown, 0 Unchecked, 18.94ms Time], IncrementalHoareTripleChecker [837 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 2765.06ms Time] [2021-11-12 23:15:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45853 states. [2021-11-12 23:15:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45853 to 21585. [2021-11-12 23:15:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21585 states, 15949 states have (on average 1.3148786757790456) internal successors, (20971), 16062 states have internal predecessors, (20971), 4034 states have call successors, (4034), 1574 states have call predecessors, (4034), 1601 states have return successors, (4113), 4002 states have call predecessors, (4113), 4033 states have call successors, (4113) [2021-11-12 23:15:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21585 states to 21585 states and 29118 transitions. [2021-11-12 23:15:53,624 INFO L78 Accepts]: Start accepts. Automaton has 21585 states and 29118 transitions. Word has length 562 [2021-11-12 23:15:53,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:53,624 INFO L470 AbstractCegarLoop]: Abstraction has 21585 states and 29118 transitions. [2021-11-12 23:15:53,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 2 states have call successors, (124), 2 states have call predecessors, (124), 2 states have return successors, (121), 2 states have call predecessors, (121), 2 states have call successors, (121) [2021-11-12 23:15:53,625 INFO L276 IsEmpty]: Start isEmpty. Operand 21585 states and 29118 transitions. [2021-11-12 23:15:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2021-11-12 23:15:53,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:53,660 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:53,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:53,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:54,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:15:54,063 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:54,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:54,064 INFO L85 PathProgramCache]: Analyzing trace with hash -723642628, now seen corresponding path program 1 times [2021-11-12 23:15:54,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:54,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019226699] [2021-11-12 23:15:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:54,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:54,072 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:54,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 23:16:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:02,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 5750 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:16:02,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2021-11-12 23:16:10,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-11-12 23:16:15,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:15,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019226699] [2021-11-12 23:16:15,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019226699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:16:15,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1173394976] [2021-11-12 23:16:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:15,990 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:15,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:16:15,990 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:16:15,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-12 23:16:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:19,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 5750 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:16:19,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-12 23:16:25,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2021-11-12 23:16:29,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1173394976] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:29,363 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:16:29,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-12 23:16:29,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533656019] [2021-11-12 23:16:29,364 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:29,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:16:29,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:16:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:16:29,366 INFO L87 Difference]: Start difference. First operand 21585 states and 29118 transitions. Second operand has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 4 states have call successors, (125), 2 states have call predecessors, (125), 2 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) [2021-11-12 23:16:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:39,220 INFO L93 Difference]: Finished difference Result 59638 states and 83748 transitions. [2021-11-12 23:16:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:16:39,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 4 states have call successors, (125), 2 states have call predecessors, (125), 2 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) Word has length 560 [2021-11-12 23:16:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:39,327 INFO L225 Difference]: With dead ends: 59638 [2021-11-12 23:16:39,327 INFO L226 Difference]: Without dead ends: 38113 [2021-11-12 23:16:39,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2236 GetRequests, 2226 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:16:39,362 INFO L933 BasicCegarLoop]: 3655 mSDtfsCounter, 1239 mSDsluCounter, 4938 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7608.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 8593 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.11ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7793.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:39,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1562 Valid, 8593 Invalid, 229 Unknown, 0 Unchecked, 14.11ms Time], IncrementalHoareTripleChecker [7 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 7793.87ms Time] [2021-11-12 23:16:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38113 states. [2021-11-12 23:16:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38113 to 23233. [2021-11-12 23:16:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23233 states, 17309 states have (on average 1.3252643133629904) internal successors, (22939), 17422 states have internal predecessors, (22939), 4322 states have call successors, (4322), 1574 states have call predecessors, (4322), 1601 states have return successors, (4401), 4290 states have call predecessors, (4401), 4321 states have call successors, (4401) [2021-11-12 23:16:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23233 states to 23233 states and 31662 transitions. [2021-11-12 23:16:40,824 INFO L78 Accepts]: Start accepts. Automaton has 23233 states and 31662 transitions. Word has length 560 [2021-11-12 23:16:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:40,825 INFO L470 AbstractCegarLoop]: Abstraction has 23233 states and 31662 transitions. [2021-11-12 23:16:40,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 4 states have call successors, (125), 2 states have call predecessors, (125), 2 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) [2021-11-12 23:16:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 23233 states and 31662 transitions. [2021-11-12 23:16:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2021-11-12 23:16:40,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:40,863 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:40,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:41,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-12 23:16:41,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:41,264 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:41,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1883329852, now seen corresponding path program 1 times [2021-11-12 23:16:41,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:41,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123710693] [2021-11-12 23:16:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:41,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:41,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:41,273 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:41,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-12 23:16:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:50,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 5747 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:16:50,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2021-11-12 23:16:58,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-11-12 23:17:03,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:03,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123710693] [2021-11-12 23:17:03,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123710693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:03,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [816774389] [2021-11-12 23:17:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:03,778 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:03,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:17:03,779 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:17:03,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-12 23:17:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:06,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 5747 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:17:06,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-12 23:17:12,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2021-11-12 23:17:16,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [816774389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:16,794 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:17:16,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:17:16,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733048207] [2021-11-12 23:17:16,794 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:16,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:17:16,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:16,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:17:16,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:17:16,799 INFO L87 Difference]: Start difference. First operand 23233 states and 31662 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 3 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (113), 3 states have call predecessors, (113), 3 states have call successors, (113) [2021-11-12 23:17:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:20,045 INFO L93 Difference]: Finished difference Result 53898 states and 74834 transitions. [2021-11-12 23:17:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:17:20,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 3 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (113), 3 states have call predecessors, (113), 3 states have call successors, (113) Word has length 560 [2021-11-12 23:17:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:20,125 INFO L225 Difference]: With dead ends: 53898 [2021-11-12 23:17:20,125 INFO L226 Difference]: Without dead ends: 30725 [2021-11-12 23:17:20,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2236 GetRequests, 2227 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:17:20,171 INFO L933 BasicCegarLoop]: 2720 mSDtfsCounter, 671 mSDsluCounter, 2078 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1773.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 4798 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.91ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1810.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:20,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 4798 Invalid, 27 Unknown, 0 Unchecked, 5.91ms Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 1810.06ms Time] [2021-11-12 23:17:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30725 states. [2021-11-12 23:17:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30725 to 23233. [2021-11-12 23:17:21,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23233 states, 17309 states have (on average 1.3238777514587787) internal successors, (22915), 17422 states have internal predecessors, (22915), 4322 states have call successors, (4322), 1574 states have call predecessors, (4322), 1601 states have return successors, (4401), 4290 states have call predecessors, (4401), 4321 states have call successors, (4401) [2021-11-12 23:17:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23233 states to 23233 states and 31638 transitions. [2021-11-12 23:17:21,491 INFO L78 Accepts]: Start accepts. Automaton has 23233 states and 31638 transitions. Word has length 560 [2021-11-12 23:17:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:21,492 INFO L470 AbstractCegarLoop]: Abstraction has 23233 states and 31638 transitions. [2021-11-12 23:17:21,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 3 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (113), 3 states have call predecessors, (113), 3 states have call successors, (113) [2021-11-12 23:17:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 23233 states and 31638 transitions. [2021-11-12 23:17:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2021-11-12 23:17:21,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:21,529 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:21,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:21,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:21,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:21,931 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash 474393943, now seen corresponding path program 1 times [2021-11-12 23:17:21,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:21,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553924069] [2021-11-12 23:17:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:21,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:21,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:21,939 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:21,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 23:17:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 5781 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:17:30,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 233 proven. 3 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2021-11-12 23:17:38,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-11-12 23:17:44,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:44,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553924069] [2021-11-12 23:17:44,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553924069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:44,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1833751999] [2021-11-12 23:17:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:44,043 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:44,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:17:44,044 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:17:44,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-12 23:17:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:47,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 5781 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:17:47,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2021-11-12 23:17:54,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2021-11-12 23:17:58,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1833751999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:58,377 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:17:58,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6, 6] total 15 [2021-11-12 23:17:58,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688326539] [2021-11-12 23:17:58,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:58,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:17:58,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:17:58,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:17:58,379 INFO L87 Difference]: Start difference. First operand 23233 states and 31638 transitions. Second operand has 7 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 3 states have call successors, (139), 2 states have call predecessors, (139), 2 states have return successors, (136), 3 states have call predecessors, (136), 3 states have call successors, (136) [2021-11-12 23:18:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:03,327 INFO L93 Difference]: Finished difference Result 35640 states and 49853 transitions. [2021-11-12 23:18:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:18:03,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 3 states have call successors, (139), 2 states have call predecessors, (139), 2 states have return successors, (136), 3 states have call predecessors, (136), 3 states have call successors, (136) Word has length 569 [2021-11-12 23:18:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:03,329 INFO L225 Difference]: With dead ends: 35640 [2021-11-12 23:18:03,329 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 23:18:03,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2276 GetRequests, 2261 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:18:03,373 INFO L933 BasicCegarLoop]: 2199 mSDtfsCounter, 2672 mSDsluCounter, 6594 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3235.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2772 SdHoareTripleChecker+Valid, 8793 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.34ms SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3370.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:03,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2772 Valid, 8793 Invalid, 602 Unknown, 0 Unchecked, 13.34ms Time], IncrementalHoareTripleChecker [594 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 3370.55ms Time] [2021-11-12 23:18:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 23:18:03,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 23:18:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 23:18:03,381 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 569 [2021-11-12 23:18:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:03,382 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 23:18:03,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 3 states have call successors, (139), 2 states have call predecessors, (139), 2 states have return successors, (136), 3 states have call predecessors, (136), 3 states have call successors, (136) [2021-11-12 23:18:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 23:18:03,383 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 23:18:03,385 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:18:03,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:03,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:03,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_818aca2e-4911-46e9-9216-9f0321bdc393/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:18:03,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 23:18:21,932 WARN L227 SmtUtils]: Spent 17.91s on a formula simplification. DAG size of input: 173 DAG size of output: 173 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-12 23:18:39,147 WARN L227 SmtUtils]: Spent 16.92s on a formula simplification. DAG size of input: 173 DAG size of output: 173 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)