./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.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_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/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_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/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_e4900f04-cf0f-4ea7-b737-4180b7f94470/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 3ddf607d1745197f42ec93d91371fe3b581377117340b3a7d449f25d43cdec16 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:26:32,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:26:32,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:26:32,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:26:32,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:26:32,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:26:32,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:26:32,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:26:32,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:26:32,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:26:32,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:26:32,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:26:32,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:26:32,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:26:32,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:26:32,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:26:32,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:26:32,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:26:32,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:26:32,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:26:32,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:26:32,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:26:32,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:26:32,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:26:32,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:26:32,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:26:32,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:26:32,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:26:32,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:26:32,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:26:32,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:26:32,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:26:32,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:26:32,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:26:32,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:26:32,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:26:32,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:26:32,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:26:32,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:26:32,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:26:32,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:26:32,098 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 02:26:32,125 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:26:32,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:26:32,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:26:32,132 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:26:32,132 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:26:32,132 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:26:32,132 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:26:32,133 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:26:32,136 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:26:32,136 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:26:32,137 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:26:32,137 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:26:32,137 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:26:32,137 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:26:32,138 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:26:32,138 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:26:32,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:26:32,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:26:32,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:26:32,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:26:32,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:26:32,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:26:32,141 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:26:32,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:26:32,142 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:26:32,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:26:32,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:26:32,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:26:32,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:26:32,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:26:32,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:26:32,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:26:32,145 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:26:32,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:26:32,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:26:32,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:26:32,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:26:32,147 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_e4900f04-cf0f-4ea7-b737-4180b7f94470/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ddf607d1745197f42ec93d91371fe3b581377117340b3a7d449f25d43cdec16 [2021-11-13 02:26:32,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:26:32,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:26:32,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:26:32,435 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:26:32,436 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:26:32,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-13 02:26:32,519 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/data/cbea19116/be002afc85c54b698aacd3a6867e4c4a/FLAG16d9f9cd4 [2021-11-13 02:26:33,434 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:26:33,434 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-13 02:26:33,489 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/data/cbea19116/be002afc85c54b698aacd3a6867e4c4a/FLAG16d9f9cd4 [2021-11-13 02:26:33,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/data/cbea19116/be002afc85c54b698aacd3a6867e4c4a [2021-11-13 02:26:33,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:26:33,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:26:33,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:33,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:26:33,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:26:33,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:33" (1/1) ... [2021-11-13 02:26:33,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cab06b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:33, skipping insertion in model container [2021-11-13 02:26:33,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:33" (1/1) ... [2021-11-13 02:26:33,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:26:34,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:26:35,538 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:35,545 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:35,866 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,140 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,153 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,161 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,168 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,169 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,178 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,185 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,229 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,239 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,255 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,270 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,275 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,285 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,310 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,312 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,313 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,331 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,393 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,394 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,395 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,395 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,397 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,403 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,404 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,409 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,417 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,424 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,440 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,441 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,456 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,476 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,483 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,491 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,508 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,514 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,536 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,537 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,539 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,557 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,564 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,588 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,644 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,649 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,657 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,675 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,690 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,696 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,705 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,712 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,721 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:36,732 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,062 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,069 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,072 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,072 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,075 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,076 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,077 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,078 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,078 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,078 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,094 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,095 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,102 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,105 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,105 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,140 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:37,151 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:26:38,012 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_e4900f04-cf0f-4ea7-b737-4180b7f94470/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402050,402063] [2021-11-13 02:26:38,015 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_e4900f04-cf0f-4ea7-b737-4180b7f94470/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402195,402208] [2021-11-13 02:26:38,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:38,106 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) [2021-11-13 02:26:38,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11f89a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:38, skipping insertion in model container [2021-11-13 02:26:38,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:38,112 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:26:38,114 INFO L158 Benchmark]: Toolchain (without parser) took 4269.98ms. Allocated memory was 140.5MB in the beginning and 182.5MB in the end (delta: 41.9MB). Free memory was 108.6MB in the beginning and 113.6MB in the end (delta: -5.0MB). Peak memory consumption was 71.5MB. Max. memory is 16.1GB. [2021-11-13 02:26:38,116 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 104.9MB. Free memory is still 82.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:26:38,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4267.29ms. Allocated memory was 140.5MB in the beginning and 182.5MB in the end (delta: 41.9MB). Free memory was 108.3MB in the beginning and 113.6MB in the end (delta: -5.3MB). Peak memory consumption was 71.5MB. Max. memory is 16.1GB. [2021-11-13 02:26:38,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 104.9MB. Free memory is still 82.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4267.29ms. Allocated memory was 140.5MB in the beginning and 182.5MB in the end (delta: 41.9MB). Free memory was 108.3MB in the beginning and 113.6MB in the end (delta: -5.3MB). Peak memory consumption was 71.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6620]: 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_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/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_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/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_e4900f04-cf0f-4ea7-b737-4180b7f94470/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 3ddf607d1745197f42ec93d91371fe3b581377117340b3a7d449f25d43cdec16 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:26:40,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:26:40,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:26:40,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:26:40,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:26:40,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:26:40,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:26:40,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:26:40,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:26:40,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:26:40,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:26:40,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:26:40,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:26:40,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:26:40,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:26:40,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:26:40,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:26:40,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:26:40,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:26:40,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:26:40,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:26:40,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:26:40,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:26:40,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:26:40,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:26:40,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:26:40,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:26:40,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:26:40,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:26:40,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:26:40,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:26:40,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:26:40,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:26:40,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:26:40,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:26:40,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:26:40,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:26:40,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:26:40,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:26:40,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:26:40,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:26:40,402 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 02:26:40,444 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:26:40,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:26:40,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:26:40,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:26:40,446 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:26:40,446 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:26:40,447 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:26:40,447 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:26:40,447 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:26:40,447 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:26:40,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:26:40,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:26:40,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:26:40,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:26:40,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:26:40,451 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:26:40,451 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:26:40,451 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:26:40,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:26:40,452 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:26:40,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:26:40,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:26:40,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:26:40,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:26:40,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:26:40,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:26:40,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:26:40,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:26:40,454 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:26:40,454 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:26:40,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:26:40,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:26:40,455 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:26:40,455 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_e4900f04-cf0f-4ea7-b737-4180b7f94470/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ddf607d1745197f42ec93d91371fe3b581377117340b3a7d449f25d43cdec16 [2021-11-13 02:26:40,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:26:40,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:26:40,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:26:40,879 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:26:40,880 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:26:40,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-13 02:26:40,959 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/data/c54734720/f9bb51e15e854495925bed0f349ce384/FLAG14b086c1c [2021-11-13 02:26:41,979 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:26:41,980 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-13 02:26:42,083 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/data/c54734720/f9bb51e15e854495925bed0f349ce384/FLAG14b086c1c [2021-11-13 02:26:42,345 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/data/c54734720/f9bb51e15e854495925bed0f349ce384 [2021-11-13 02:26:42,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:26:42,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:26:42,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:42,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:26:42,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:26:42,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:42" (1/1) ... [2021-11-13 02:26:42,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3290f919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:42, skipping insertion in model container [2021-11-13 02:26:42,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:42" (1/1) ... [2021-11-13 02:26:42,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:26:42,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:26:46,436 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_e4900f04-cf0f-4ea7-b737-4180b7f94470/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402050,402063] [2021-11-13 02:26:46,439 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_e4900f04-cf0f-4ea7-b737-4180b7f94470/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402195,402208] [2021-11-13 02:26:46,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:46,500 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:26:46,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:26:47,006 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_e4900f04-cf0f-4ea7-b737-4180b7f94470/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402050,402063] [2021-11-13 02:26:47,007 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_e4900f04-cf0f-4ea7-b737-4180b7f94470/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402195,402208] [2021-11-13 02:26:47,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:47,038 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:26:47,468 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_e4900f04-cf0f-4ea7-b737-4180b7f94470/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402050,402063] [2021-11-13 02:26:47,469 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_e4900f04-cf0f-4ea7-b737-4180b7f94470/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i[402195,402208] [2021-11-13 02:26:47,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:47,785 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:26:47,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:47 WrapperNode [2021-11-13 02:26:47,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:47,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:26:47,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:26:47,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:26:47,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:47" (1/1) ... [2021-11-13 02:26:47,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:47" (1/1) ... [2021-11-13 02:26:48,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:26:48,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:26:48,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:26:48,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:26:48,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:47" (1/1) ... [2021-11-13 02:26:48,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:47" (1/1) ... [2021-11-13 02:26:48,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:47" (1/1) ... [2021-11-13 02:26:48,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:47" (1/1) ... [2021-11-13 02:26:48,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:47" (1/1) ... [2021-11-13 02:26:48,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:47" (1/1) ... [2021-11-13 02:26:48,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:47" (1/1) ... [2021-11-13 02:26:48,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:26:48,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:26:48,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:26:48,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:26:48,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:47" (1/1) ... [2021-11-13 02:26:48,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:26:48,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:48,472 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:26:48,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:26:48,525 INFO L130 BoogieDeclarations]: Found specification of procedure get_page [2021-11-13 02:26:48,525 INFO L138 BoogieDeclarations]: Found implementation of procedure get_page [2021-11-13 02:26:48,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-13 02:26:48,526 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-13 02:26:48,526 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_head_init [2021-11-13 02:26:48,526 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_head_init [2021-11-13 02:26:48,526 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-13 02:26:48,526 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-13 02:26:48,526 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 02:26:48,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 02:26:48,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_rx_lock_of_netfront_info [2021-11-13 02:26:48,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_rx_lock_of_netfront_info [2021-11-13 02:26:48,527 INFO L130 BoogieDeclarations]: Found specification of procedure bind_evtchn_to_irqhandler [2021-11-13 02:26:48,527 INFO L138 BoogieDeclarations]: Found implementation of procedure bind_evtchn_to_irqhandler [2021-11-13 02:26:48,527 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-13 02:26:48,528 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-13 02:26:48,528 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_tx_interrupt [2021-11-13 02:26:48,528 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_tx_interrupt [2021-11-13 02:26:48,528 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-13 02:26:48,528 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-13 02:26:48,528 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_grant_ring [2021-11-13 02:26:48,528 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_grant_ring [2021-11-13 02:26:48,529 INFO L130 BoogieDeclarations]: Found specification of procedure free_percpu [2021-11-13 02:26:48,529 INFO L138 BoogieDeclarations]: Found implementation of procedure free_percpu [2021-11-13 02:26:48,529 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_claim_grant_reference [2021-11-13 02:26:48,529 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_claim_grant_reference [2021-11-13 02:26:48,529 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access [2021-11-13 02:26:48,529 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access [2021-11-13 02:26:48,529 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_disconnect_backend [2021-11-13 02:26:48,530 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_disconnect_backend [2021-11-13 02:26:48,530 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-13 02:26:48,530 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-13 02:26:48,530 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_alloc_grant_references [2021-11-13 02:26:48,531 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_alloc_grant_references [2021-11-13 02:26:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_release_grant_reference [2021-11-13 02:26:48,531 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_release_grant_reference [2021-11-13 02:26:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-13 02:26:48,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-13 02:26:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-13 02:26:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-13 02:26:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-13 02:26:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-13 02:26:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_rxidx [2021-11-13 02:26:48,532 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_rxidx [2021-11-13 02:26:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:26:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 02:26:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:26:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-13 02:26:48,533 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-13 02:26:48,534 INFO L130 BoogieDeclarations]: Found specification of procedure pfn_to_mfn [2021-11-13 02:26:48,535 INFO L138 BoogieDeclarations]: Found implementation of procedure pfn_to_mfn [2021-11-13 02:26:48,535 INFO L130 BoogieDeclarations]: Found specification of procedure skb_entry_set_link [2021-11-13 02:26:48,536 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_entry_set_link [2021-11-13 02:26:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-13 02:26:48,536 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-13 02:26:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_free_grant_references [2021-11-13 02:26:48,536 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_free_grant_references [2021-11-13 02:26:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure simple_strtoul [2021-11-13 02:26:48,537 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_strtoul [2021-11-13 02:26:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-13 02:26:48,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-13 02:26:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-13 02:26:48,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-13 02:26:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-13 02:26:48,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-13 02:26:48,538 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_poll_controller [2021-11-13 02:26:48,539 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_poll_controller [2021-11-13 02:26:48,539 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-13 02:26:48,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-13 02:26:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 02:26:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 02:26:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-13 02:26:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-13 02:26:48,540 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_124 [2021-11-13 02:26:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_124 [2021-11-13 02:26:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-13 02:26:48,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-13 02:26:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure skb_get [2021-11-13 02:26:48,541 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_get [2021-11-13 02:26:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-13 02:26:48,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-13 02:26:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_get_rx_ref [2021-11-13 02:26:48,542 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_get_rx_ref [2021-11-13 02:26:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_tx_lock_of_netfront_info [2021-11-13 02:26:48,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_tx_lock_of_netfront_info [2021-11-13 02:26:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_uninit [2021-11-13 02:26:48,543 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_uninit [2021-11-13 02:26:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2021-11-13 02:26:48,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2021-11-13 02:26:48,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:26:48,544 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-13 02:26:48,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-13 02:26:48,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:26:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-13 02:26:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-13 02:26:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-13 02:26:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headlen [2021-11-13 02:26:48,545 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headlen [2021-11-13 02:26:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-13 02:26:48,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-13 02:26:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-13 02:26:48,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-13 02:26:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_gso [2021-11-13 02:26:48,546 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_gso [2021-11-13 02:26:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_grant_foreign_access_ref [2021-11-13 02:26:48,547 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_grant_foreign_access_ref [2021-11-13 02:26:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-13 02:26:48,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-13 02:26:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-13 02:26:48,548 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-13 02:26:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-13 02:26:48,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-13 02:26:48,551 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2021-11-13 02:26:48,552 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2021-11-13 02:26:48,552 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-13 02:26:48,553 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-13 02:26:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-13 02:26:48,553 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_get_rx_skb [2021-11-13 02:26:48,554 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_get_rx_skb [2021-11-13 02:26:48,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:26:48,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:26:48,561 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-13 02:26:48,561 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-13 02:26:48,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 02:26:48,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 02:26:48,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 02:26:48,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 02:26:48,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 02:26:48,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 02:26:48,562 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 02:26:48,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 02:26:48,563 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_release_tx_bufs [2021-11-13 02:26:48,563 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_release_tx_bufs [2021-11-13 02:26:48,563 INFO L130 BoogieDeclarations]: Found specification of procedure napi_schedule [2021-11-13 02:26:48,563 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_schedule [2021-11-13 02:26:48,563 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_write [2021-11-13 02:26:48,563 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_write [2021-11-13 02:26:48,563 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-13 02:26:48,564 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-13 02:26:48,564 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-13 02:26:48,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-13 02:26:48,564 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_update_begin [2021-11-13 02:26:48,564 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_update_begin [2021-11-13 02:26:48,564 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_transaction_end [2021-11-13 02:26:48,564 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_transaction_end [2021-11-13 02:26:48,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 02:26:48,565 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 02:26:48,565 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-13 02:26:48,565 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-13 02:26:48,565 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_get_drvdata [2021-11-13 02:26:48,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_get_drvdata [2021-11-13 02:26:48,565 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_alloc_evtchn [2021-11-13 02:26:48,565 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_alloc_evtchn [2021-11-13 02:26:48,566 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-13 02:26:48,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-13 02:26:48,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:26:48,566 INFO L130 BoogieDeclarations]: Found specification of procedure netfront_tx_slot_available [2021-11-13 02:26:48,566 INFO L138 BoogieDeclarations]: Found implementation of procedure netfront_tx_slot_available [2021-11-13 02:26:48,566 INFO L130 BoogieDeclarations]: Found specification of procedure notify_remote_via_irq [2021-11-13 02:26:48,566 INFO L138 BoogieDeclarations]: Found implementation of procedure notify_remote_via_irq [2021-11-13 02:26:48,567 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_tx_lock_of_netfront_info [2021-11-13 02:26:48,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_tx_lock_of_netfront_info [2021-11-13 02:26:48,567 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_can_sg [2021-11-13 02:26:48,567 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_can_sg [2021-11-13 02:26:48,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:26:48,567 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_queue_tail [2021-11-13 02:26:48,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_queue_tail [2021-11-13 02:26:48,568 INFO L130 BoogieDeclarations]: Found specification of procedure store_rxbuf_min [2021-11-13 02:26:48,568 INFO L138 BoogieDeclarations]: Found implementation of procedure store_rxbuf_min [2021-11-13 02:26:48,568 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_107 [2021-11-13 02:26:48,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_107 [2021-11-13 02:26:48,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 02:26:48,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 02:26:48,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 02:26:48,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 02:26:48,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 02:26:48,569 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2021-11-13 02:26:48,569 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2021-11-13 02:26:48,569 INFO L130 BoogieDeclarations]: Found specification of procedure add_id_to_freelist [2021-11-13 02:26:48,570 INFO L138 BoogieDeclarations]: Found implementation of procedure add_id_to_freelist [2021-11-13 02:26:48,570 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_alloc_rx_buffers [2021-11-13 02:26:48,570 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_alloc_rx_buffers [2021-11-13 02:26:48,570 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-13 02:26:48,571 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-13 02:26:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-13 02:26:48,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-13 02:26:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure free_pages [2021-11-13 02:26:48,571 INFO L138 BoogieDeclarations]: Found implementation of procedure free_pages [2021-11-13 02:26:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access_ref [2021-11-13 02:26:48,571 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access_ref [2021-11-13 02:26:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-13 02:26:48,572 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-13 02:26:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_bh_104 [2021-11-13 02:26:48,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_bh_104 [2021-11-13 02:26:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure unbind_from_irqhandler [2021-11-13 02:26:48,572 INFO L138 BoogieDeclarations]: Found implementation of procedure unbind_from_irqhandler [2021-11-13 02:26:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure get_zeroed_page [2021-11-13 02:26:48,572 INFO L138 BoogieDeclarations]: Found implementation of procedure get_zeroed_page [2021-11-13 02:26:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_insert [2021-11-13 02:26:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_insert [2021-11-13 02:26:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-13 02:26:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-13 02:26:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-13 02:26:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-13 02:26:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_page [2021-11-13 02:26:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_page [2021-11-13 02:26:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_end_access [2021-11-13 02:26:48,574 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_end_access [2021-11-13 02:26:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-13 02:26:48,574 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-13 02:26:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 02:26:48,574 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 02:26:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure skb_add_rx_frag [2021-11-13 02:26:48,575 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_add_rx_frag [2021-11-13 02:26:48,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-13 02:26:48,575 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2021-11-13 02:26:48,575 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2021-11-13 02:26:48,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-13 02:26:48,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-13 02:26:48,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-13 02:26:48,576 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 02:26:48,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 02:26:48,576 INFO L130 BoogieDeclarations]: Found specification of procedure get_id_from_freelist [2021-11-13 02:26:48,576 INFO L138 BoogieDeclarations]: Found implementation of procedure get_id_from_freelist [2021-11-13 02:26:48,576 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-13 02:26:48,576 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-13 02:26:48,576 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_rx_interrupt [2021-11-13 02:26:48,576 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_rx_interrupt [2021-11-13 02:26:48,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_rx_lock_of_netfront_info [2021-11-13 02:26:48,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_rx_lock_of_netfront_info [2021-11-13 02:26:48,577 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-13 02:26:48,577 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-13 02:26:48,577 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_next [2021-11-13 02:26:48,577 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_next [2021-11-13 02:26:48,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_bh_105 [2021-11-13 02:26:48,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_bh_105 [2021-11-13 02:26:48,578 INFO L130 BoogieDeclarations]: Found specification of procedure store_rxbuf_max [2021-11-13 02:26:48,579 INFO L138 BoogieDeclarations]: Found implementation of procedure store_rxbuf_max [2021-11-13 02:26:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-13 02:26:48,582 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-13 02:26:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_len [2021-11-13 02:26:48,583 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_len [2021-11-13 02:26:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-13 02:26:48,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-13 02:26:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_interrupt [2021-11-13 02:26:48,583 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_interrupt [2021-11-13 02:26:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_123 [2021-11-13 02:26:48,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_123 [2021-11-13 02:26:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-13 02:26:48,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-13 02:26:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-13 02:26:48,585 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-13 02:26:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-13 02:26:48,585 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-13 02:26:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_free_evtchn [2021-11-13 02:26:48,585 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_free_evtchn [2021-11-13 02:26:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_tx_buf_gc [2021-11-13 02:26:48,586 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_tx_buf_gc [2021-11-13 02:26:51,984 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 02:27:52,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:27:52,240 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 02:27:52,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:27:52 BoogieIcfgContainer [2021-11-13 02:27:52,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:27:52,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:27:52,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:27:52,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:27:52,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:26:42" (1/3) ... [2021-11-13 02:27:52,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7660d27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:27:52, skipping insertion in model container [2021-11-13 02:27:52,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:47" (2/3) ... [2021-11-13 02:27:52,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7660d27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:27:52, skipping insertion in model container [2021-11-13 02:27:52,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:27:52" (3/3) ... [2021-11-13 02:27:52,253 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-alloc-spinlock_drivers-net-xen-netfront.cil.i [2021-11-13 02:27:52,259 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:27:52,259 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:27:52,317 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:27:52,324 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 [2021-11-13 02:27:52,324 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:27:52,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 1683 states, 1140 states have (on average 1.2526315789473683) internal successors, (1428), 1179 states have internal predecessors, (1428), 427 states have call successors, (427), 115 states have call predecessors, (427), 114 states have return successors, (423), 420 states have call predecessors, (423), 423 states have call successors, (423) [2021-11-13 02:27:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-13 02:27:52,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:52,410 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-13 02:27:52,411 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:52,416 INFO L85 PathProgramCache]: Analyzing trace with hash 51079051, now seen corresponding path program 1 times [2021-11-13 02:27:52,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:27:52,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419411552] [2021-11-13 02:27:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:52,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:27:52,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:27:52,444 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:27:52,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:27:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:57,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1913 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 02:27:57,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-11-13 02:27:59,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-13 02:28:00,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:00,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419411552] [2021-11-13 02:28:00,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419411552] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:00,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:28:00,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 21 [2021-11-13 02:28:00,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044696290] [2021-11-13 02:28:00,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:00,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:28:00,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:01,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:28:01,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:28:01,020 INFO L87 Difference]: Start difference. First operand has 1683 states, 1140 states have (on average 1.2526315789473683) internal successors, (1428), 1179 states have internal predecessors, (1428), 427 states have call successors, (427), 115 states have call predecessors, (427), 114 states have return successors, (423), 420 states have call predecessors, (423), 423 states have call successors, (423) Second operand has 12 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 states have internal predecessors, (100), 4 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 02:28:02,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:02,942 INFO L93 Difference]: Finished difference Result 3349 states and 4557 transitions. [2021-11-13 02:28:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 02:28:02,945 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 states have internal predecessors, (100), 4 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 227 [2021-11-13 02:28:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:02,971 INFO L225 Difference]: With dead ends: 3349 [2021-11-13 02:28:02,971 INFO L226 Difference]: Without dead ends: 1641 [2021-11-13 02:28:02,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-11-13 02:28:02,987 INFO L933 BasicCegarLoop]: 2232 mSDtfsCounter, 23 mSDsluCounter, 22253 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1193.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 24485 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 68.76ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1296.20ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:02,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 24485 Invalid, 454 Unknown, 0 Unchecked, 68.76ms Time], IncrementalHoareTripleChecker [30 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 1296.20ms Time] [2021-11-13 02:28:03,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-13 02:28:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-13 02:28:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1123 states have (on average 1.2377560106856633) internal successors, (1390), 1158 states have internal predecessors, (1390), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:28:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2198 transitions. [2021-11-13 02:28:03,140 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2198 transitions. Word has length 227 [2021-11-13 02:28:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:03,141 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2198 transitions. [2021-11-13 02:28:03,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 states have internal predecessors, (100), 4 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-13 02:28:03,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2198 transitions. [2021-11-13 02:28:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-13 02:28:03,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:03,149 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:03,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:03,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:03,371 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash -178833237, now seen corresponding path program 1 times [2021-11-13 02:28:03,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:03,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131629019] [2021-11-13 02:28:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:03,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:03,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:03,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:03,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:28:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:08,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1911 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:28:08,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:28:09,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 02:28:11,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:11,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131629019] [2021-11-13 02:28:11,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131629019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:11,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1139808602] [2021-11-13 02:28:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:11,092 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:11,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:28:11,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:28:11,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-13 02:28:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:13,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1911 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:28:13,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:28:14,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:28:15,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1139808602] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:15,515 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:15,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [15, 15] total 21 [2021-11-13 02:28:15,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457878119] [2021-11-13 02:28:15,517 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:15,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:15,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:15,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:15,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:28:15,521 INFO L87 Difference]: Start difference. First operand 1641 states and 2198 transitions. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:28:17,803 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:22,451 INFO L93 Difference]: Finished difference Result 3259 states and 4374 transitions. [2021-11-13 02:28:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) Word has length 219 [2021-11-13 02:28:22,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:22,467 INFO L225 Difference]: With dead ends: 3259 [2021-11-13 02:28:22,467 INFO L226 Difference]: Without dead ends: 1641 [2021-11-13 02:28:22,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 853 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:28:22,477 INFO L933 BasicCegarLoop]: 2196 mSDtfsCounter, 2083 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6150.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2083 SdHoareTripleChecker+Valid, 3583 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.43ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6695.49ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:22,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2083 Valid, 3583 Invalid, 847 Unknown, 0 Unchecked, 24.43ms Time], IncrementalHoareTripleChecker [36 Valid, 810 Invalid, 1 Unknown, 0 Unchecked, 6695.49ms Time] [2021-11-13 02:28:22,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-13 02:28:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-13 02:28:22,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1123 states have (on average 1.2368655387355298) internal successors, (1389), 1158 states have internal predecessors, (1389), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:28:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2197 transitions. [2021-11-13 02:28:22,578 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2197 transitions. Word has length 219 [2021-11-13 02:28:22,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:22,581 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2197 transitions. [2021-11-13 02:28:22,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:28:22,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2197 transitions. [2021-11-13 02:28:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-13 02:28:22,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:22,588 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-13 02:28:22,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:22,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:23,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:23,007 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:23,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1623636942, now seen corresponding path program 1 times [2021-11-13 02:28:23,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:23,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264619044] [2021-11-13 02:28:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:23,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:23,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:23,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:23,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:28:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:27,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1954 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:28:27,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-13 02:28:29,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 3 proven. 57 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-11-13 02:28:30,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:30,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264619044] [2021-11-13 02:28:30,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264619044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:30,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1160522731] [2021-11-13 02:28:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:30,502 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:30,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:28:30,511 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:28:30,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-13 02:28:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:32,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 1954 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:28:32,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-13 02:28:33,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-13 02:28:34,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1160522731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:34,992 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:34,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [15, 15] total 21 [2021-11-13 02:28:34,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180574790] [2021-11-13 02:28:34,993 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:34,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:34,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:34,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:34,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:28:34,995 INFO L87 Difference]: Start difference. First operand 1641 states and 2197 transitions. Second operand has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 3 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (60), 4 states have call predecessors, (60), 3 states have call successors, (60) [2021-11-13 02:28:37,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:28:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:41,619 INFO L93 Difference]: Finished difference Result 3259 states and 4372 transitions. [2021-11-13 02:28:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:41,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 3 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (60), 4 states have call predecessors, (60), 3 states have call successors, (60) Word has length 246 [2021-11-13 02:28:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:41,633 INFO L225 Difference]: With dead ends: 3259 [2021-11-13 02:28:41,633 INFO L226 Difference]: Without dead ends: 1641 [2021-11-13 02:28:41,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 961 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:28:41,642 INFO L933 BasicCegarLoop]: 2195 mSDtfsCounter, 2076 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5856.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2076 SdHoareTripleChecker+Valid, 3581 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.41ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6426.64ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:41,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2076 Valid, 3581 Invalid, 849 Unknown, 0 Unchecked, 20.41ms Time], IncrementalHoareTripleChecker [38 Valid, 810 Invalid, 1 Unknown, 0 Unchecked, 6426.64ms Time] [2021-11-13 02:28:41,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-13 02:28:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-13 02:28:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1123 states have (on average 1.2359750667853964) internal successors, (1388), 1158 states have internal predecessors, (1388), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:28:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2196 transitions. [2021-11-13 02:28:41,738 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2196 transitions. Word has length 246 [2021-11-13 02:28:41,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:41,739 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2196 transitions. [2021-11-13 02:28:41,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 3 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (60), 4 states have call predecessors, (60), 3 states have call successors, (60) [2021-11-13 02:28:41,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2196 transitions. [2021-11-13 02:28:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-13 02:28:41,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:41,747 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:41,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:41,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-13 02:28:42,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:42,163 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:42,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:42,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1709679203, now seen corresponding path program 1 times [2021-11-13 02:28:42,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:42,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046357685] [2021-11-13 02:28:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:42,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:42,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:42,171 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:42,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:28:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:47,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1955 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:28:47,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-13 02:28:48,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 3 proven. 57 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-11-13 02:28:49,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:49,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046357685] [2021-11-13 02:28:49,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046357685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:49,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [572326701] [2021-11-13 02:28:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:49,928 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:49,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:28:49,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:28:49,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-13 02:28:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:51,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 1955 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:28:51,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-13 02:28:53,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-13 02:28:54,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [572326701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:54,644 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:54,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [15, 15] total 21 [2021-11-13 02:28:54,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905462317] [2021-11-13 02:28:54,645 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:54,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:54,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:54,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:54,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:28:54,647 INFO L87 Difference]: Start difference. First operand 1641 states and 2196 transitions. Second operand has 5 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 3 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (60), 4 states have call predecessors, (60), 3 states have call successors, (60) [2021-11-13 02:28:56,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:01,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:01,227 INFO L93 Difference]: Finished difference Result 3259 states and 4370 transitions. [2021-11-13 02:29:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:29:01,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 3 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (60), 4 states have call predecessors, (60), 3 states have call successors, (60) Word has length 247 [2021-11-13 02:29:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:01,245 INFO L225 Difference]: With dead ends: 3259 [2021-11-13 02:29:01,245 INFO L226 Difference]: Without dead ends: 1641 [2021-11-13 02:29:01,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 965 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:29:01,256 INFO L933 BasicCegarLoop]: 2194 mSDtfsCounter, 2075 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5810.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 3579 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.76ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6407.36ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:01,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2075 Valid, 3579 Invalid, 849 Unknown, 0 Unchecked, 16.76ms Time], IncrementalHoareTripleChecker [38 Valid, 810 Invalid, 1 Unknown, 0 Unchecked, 6407.36ms Time] [2021-11-13 02:29:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-13 02:29:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-13 02:29:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1123 states have (on average 1.2350845948352627) internal successors, (1387), 1158 states have internal predecessors, (1387), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:29:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2195 transitions. [2021-11-13 02:29:01,364 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2195 transitions. Word has length 247 [2021-11-13 02:29:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:01,365 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2195 transitions. [2021-11-13 02:29:01,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 3 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (60), 4 states have call predecessors, (60), 3 states have call successors, (60) [2021-11-13 02:29:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2195 transitions. [2021-11-13 02:29:01,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-13 02:29:01,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:01,373 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 02:29:01,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:01,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-13 02:29:01,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:29:01,787 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1446111196, now seen corresponding path program 1 times [2021-11-13 02:29:01,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:01,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37451669] [2021-11-13 02:29:01,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:01,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:01,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:01,793 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:01,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:29:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:06,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 1914 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:29:06,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:29:08,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 02:29:09,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:09,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37451669] [2021-11-13 02:29:09,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37451669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:09,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1552408716] [2021-11-13 02:29:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:09,749 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:29:09,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:29:09,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:29:09,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-13 02:29:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:11,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1914 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:29:11,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:29:13,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:29:14,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1552408716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:14,326 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:29:14,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [15, 15] total 21 [2021-11-13 02:29:14,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483383798] [2021-11-13 02:29:14,327 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:14,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:29:14,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:14,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:29:14,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:29:14,331 INFO L87 Difference]: Start difference. First operand 1641 states and 2195 transitions. Second operand has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:29:16,589 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:20,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:20,933 INFO L93 Difference]: Finished difference Result 3259 states and 4368 transitions. [2021-11-13 02:29:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:29:20,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) Word has length 222 [2021-11-13 02:29:20,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:20,950 INFO L225 Difference]: With dead ends: 3259 [2021-11-13 02:29:20,950 INFO L226 Difference]: Without dead ends: 1641 [2021-11-13 02:29:20,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 865 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:29:20,958 INFO L933 BasicCegarLoop]: 2193 mSDtfsCounter, 2080 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5828.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2080 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.03ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6385.02ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:20,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2080 Valid, 3577 Invalid, 847 Unknown, 0 Unchecked, 13.03ms Time], IncrementalHoareTripleChecker [36 Valid, 810 Invalid, 1 Unknown, 0 Unchecked, 6385.02ms Time] [2021-11-13 02:29:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-13 02:29:21,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-13 02:29:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1123 states have (on average 1.2341941228851292) internal successors, (1386), 1158 states have internal predecessors, (1386), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:29:21,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2194 transitions. [2021-11-13 02:29:21,065 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2194 transitions. Word has length 222 [2021-11-13 02:29:21,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:21,066 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2194 transitions. [2021-11-13 02:29:21,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:29:21,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2194 transitions. [2021-11-13 02:29:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-13 02:29:21,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:21,073 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:21,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:21,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:21,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:21,491 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:21,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash -272315165, now seen corresponding path program 1 times [2021-11-13 02:29:21,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:21,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777147066] [2021-11-13 02:29:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:21,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:21,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:21,495 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:21,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:29:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:26,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 1915 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:29:26,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:29:27,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 02:29:29,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:29,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777147066] [2021-11-13 02:29:29,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777147066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:29,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [417271167] [2021-11-13 02:29:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:29,274 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:29:29,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:29:29,276 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:29:29,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-13 02:29:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:31,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1915 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:29:31,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:29:33,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:29:34,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [417271167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:34,468 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:29:34,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [15, 15] total 21 [2021-11-13 02:29:34,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861427497] [2021-11-13 02:29:34,468 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:34,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:29:34,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:29:34,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:29:34,471 INFO L87 Difference]: Start difference. First operand 1641 states and 2194 transitions. Second operand has 5 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:29:36,732 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:40,957 INFO L93 Difference]: Finished difference Result 3259 states and 4366 transitions. [2021-11-13 02:29:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:29:40,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) Word has length 223 [2021-11-13 02:29:40,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:40,972 INFO L225 Difference]: With dead ends: 3259 [2021-11-13 02:29:40,972 INFO L226 Difference]: Without dead ends: 1641 [2021-11-13 02:29:40,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:29:40,980 INFO L933 BasicCegarLoop]: 2192 mSDtfsCounter, 2079 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5800.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 3575 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.31ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6312.30ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:40,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2079 Valid, 3575 Invalid, 847 Unknown, 0 Unchecked, 14.31ms Time], IncrementalHoareTripleChecker [36 Valid, 810 Invalid, 1 Unknown, 0 Unchecked, 6312.30ms Time] [2021-11-13 02:29:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-13 02:29:41,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-13 02:29:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1123 states have (on average 1.2333036509349955) internal successors, (1385), 1158 states have internal predecessors, (1385), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:29:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2193 transitions. [2021-11-13 02:29:41,097 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2193 transitions. Word has length 223 [2021-11-13 02:29:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:41,098 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2193 transitions. [2021-11-13 02:29:41,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:29:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2193 transitions. [2021-11-13 02:29:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-13 02:29:41,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:41,105 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-13 02:29:41,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:41,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:41,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:41,519 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:41,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:41,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1176140778, now seen corresponding path program 1 times [2021-11-13 02:29:41,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:41,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964785843] [2021-11-13 02:29:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:41,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:41,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:41,524 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:41,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:29:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:46,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1958 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:29:46,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-13 02:29:48,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 3 proven. 57 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-11-13 02:29:49,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:49,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964785843] [2021-11-13 02:29:49,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964785843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:49,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1060326966] [2021-11-13 02:29:49,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:49,504 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:29:49,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:29:49,505 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:29:49,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 02:29:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:51,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1958 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:29:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-13 02:29:53,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-13 02:29:54,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1060326966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:54,290 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:29:54,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [15, 15] total 21 [2021-11-13 02:29:54,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599052295] [2021-11-13 02:29:54,291 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:54,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:29:54,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:54,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:29:54,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:29:54,293 INFO L87 Difference]: Start difference. First operand 1641 states and 2193 transitions. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 3 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (60), 4 states have call predecessors, (60), 3 states have call successors, (60) [2021-11-13 02:29:56,556 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:30:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:00,840 INFO L93 Difference]: Finished difference Result 3259 states and 4364 transitions. [2021-11-13 02:30:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:30:00,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 3 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (60), 4 states have call predecessors, (60), 3 states have call successors, (60) Word has length 250 [2021-11-13 02:30:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:00,855 INFO L225 Difference]: With dead ends: 3259 [2021-11-13 02:30:00,855 INFO L226 Difference]: Without dead ends: 1641 [2021-11-13 02:30:00,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 977 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:30:00,863 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 3355 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 784 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5823.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3355 SdHoareTripleChecker+Valid, 3573 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.23ms SdHoareTripleChecker+Time, 784 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6375.65ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:00,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3355 Valid, 3573 Invalid, 1595 Unknown, 0 Unchecked, 15.23ms Time], IncrementalHoareTripleChecker [784 Valid, 810 Invalid, 1 Unknown, 0 Unchecked, 6375.65ms Time] [2021-11-13 02:30:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-13 02:30:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-13 02:30:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1123 states have (on average 1.232413178984862) internal successors, (1384), 1158 states have internal predecessors, (1384), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:30:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2192 transitions. [2021-11-13 02:30:00,976 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2192 transitions. Word has length 250 [2021-11-13 02:30:00,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:00,977 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2192 transitions. [2021-11-13 02:30:00,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 3 states have call successors, (66), 3 states have call predecessors, (66), 4 states have return successors, (60), 4 states have call predecessors, (60), 3 states have call successors, (60) [2021-11-13 02:30:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2192 transitions. [2021-11-13 02:30:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-13 02:30:00,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:00,984 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 02:30:01,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:01,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:01,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:30:01,407 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:30:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:01,408 INFO L85 PathProgramCache]: Analyzing trace with hash -318708993, now seen corresponding path program 1 times [2021-11-13 02:30:01,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:30:01,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137165414] [2021-11-13 02:30:01,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:01,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:30:01,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:30:01,426 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:30:01,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:30:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:06,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:30:06,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:30:07,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 02:30:08,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:30:08,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137165414] [2021-11-13 02:30:08,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137165414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:30:08,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [595935617] [2021-11-13 02:30:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:08,886 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:30:08,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:30:08,895 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:30:08,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 02:30:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:30:10,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:30:12,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:30:13,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [595935617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:30:13,202 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:30:13,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [15, 15] total 21 [2021-11-13 02:30:13,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457902973] [2021-11-13 02:30:13,203 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:30:13,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:30:13,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:30:13,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:30:13,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:30:13,205 INFO L87 Difference]: Start difference. First operand 1641 states and 2192 transitions. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:30:15,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:30:19,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:19,818 INFO L93 Difference]: Finished difference Result 3259 states and 4362 transitions. [2021-11-13 02:30:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:30:19,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) Word has length 225 [2021-11-13 02:30:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:19,893 INFO L225 Difference]: With dead ends: 3259 [2021-11-13 02:30:19,893 INFO L226 Difference]: Without dead ends: 1641 [2021-11-13 02:30:19,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:30:19,898 INFO L933 BasicCegarLoop]: 2190 mSDtfsCounter, 2077 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5902.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2077 SdHoareTripleChecker+Valid, 3571 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.83ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6416.71ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:19,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2077 Valid, 3571 Invalid, 847 Unknown, 0 Unchecked, 13.83ms Time], IncrementalHoareTripleChecker [36 Valid, 810 Invalid, 1 Unknown, 0 Unchecked, 6416.71ms Time] [2021-11-13 02:30:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-13 02:30:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-13 02:30:20,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1123 states have (on average 1.2315227070347283) internal successors, (1383), 1158 states have internal predecessors, (1383), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:30:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2191 transitions. [2021-11-13 02:30:20,014 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2191 transitions. Word has length 225 [2021-11-13 02:30:20,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:20,015 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2191 transitions. [2021-11-13 02:30:20,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:30:20,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2191 transitions. [2021-11-13 02:30:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-13 02:30:20,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:20,023 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 02:30:20,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:20,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-13 02:30:20,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:30:20,440 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:30:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash 522593102, now seen corresponding path program 1 times [2021-11-13 02:30:20,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:30:20,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970264721] [2021-11-13 02:30:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:20,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:30:20,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:30:20,444 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:30:20,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:30:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:25,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1918 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:30:25,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:30:26,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 02:30:27,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:30:27,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970264721] [2021-11-13 02:30:27,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970264721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:30:27,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [542946935] [2021-11-13 02:30:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:27,795 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:30:27,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:30:27,796 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:30:27,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-13 02:30:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:29,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 1918 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:30:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:30:31,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:30:32,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [542946935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:30:32,195 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:30:32,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [15, 15] total 21 [2021-11-13 02:30:32,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790607564] [2021-11-13 02:30:32,196 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:30:32,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:30:32,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:30:32,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:30:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:30:32,198 INFO L87 Difference]: Start difference. First operand 1641 states and 2191 transitions. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:30:34,431 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:30:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:38,762 INFO L93 Difference]: Finished difference Result 3259 states and 4360 transitions. [2021-11-13 02:30:38,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:30:38,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) Word has length 226 [2021-11-13 02:30:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:38,774 INFO L225 Difference]: With dead ends: 3259 [2021-11-13 02:30:38,775 INFO L226 Difference]: Without dead ends: 1641 [2021-11-13 02:30:38,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:30:38,782 INFO L933 BasicCegarLoop]: 2189 mSDtfsCounter, 3357 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 786 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5820.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3357 SdHoareTripleChecker+Valid, 3569 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.81ms SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6382.73ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:38,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3357 Valid, 3569 Invalid, 1597 Unknown, 0 Unchecked, 14.81ms Time], IncrementalHoareTripleChecker [786 Valid, 810 Invalid, 1 Unknown, 0 Unchecked, 6382.73ms Time] [2021-11-13 02:30:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-13 02:30:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-13 02:30:38,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1123 states have (on average 1.2306322350845948) internal successors, (1382), 1158 states have internal predecessors, (1382), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:30:38,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2190 transitions. [2021-11-13 02:30:38,905 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2190 transitions. Word has length 226 [2021-11-13 02:30:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:38,906 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2190 transitions. [2021-11-13 02:30:38,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 5 states have internal predecessors, (209), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:30:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2190 transitions. [2021-11-13 02:30:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-13 02:30:38,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:38,911 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:30:38,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:39,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:39,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:30:39,335 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:30:39,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:39,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1080590619, now seen corresponding path program 1 times [2021-11-13 02:30:39,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:30:39,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775528744] [2021-11-13 02:30:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:39,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:30:39,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:30:39,355 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:30:39,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:30:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1919 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:30:44,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:30:45,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 02:30:46,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:30:46,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775528744] [2021-11-13 02:30:46,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775528744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:30:46,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [878180444] [2021-11-13 02:30:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:46,763 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:30:46,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:30:46,764 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:30:46,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-13 02:30:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:48,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1919 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:30:48,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:30:50,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:30:51,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [878180444] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:30:51,209 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:30:51,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [15, 15] total 21 [2021-11-13 02:30:51,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932905055] [2021-11-13 02:30:51,210 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:30:51,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:30:51,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:30:51,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:30:51,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:30:51,212 INFO L87 Difference]: Start difference. First operand 1641 states and 2190 transitions. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:30:53,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:30:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:57,741 INFO L93 Difference]: Finished difference Result 3259 states and 4358 transitions. [2021-11-13 02:30:57,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:30:57,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) Word has length 227 [2021-11-13 02:30:57,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:57,755 INFO L225 Difference]: With dead ends: 3259 [2021-11-13 02:30:57,755 INFO L226 Difference]: Without dead ends: 1641 [2021-11-13 02:30:57,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 885 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:30:57,762 INFO L933 BasicCegarLoop]: 2188 mSDtfsCounter, 2075 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5848.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.81ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6354.34ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:57,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2075 Valid, 3567 Invalid, 847 Unknown, 0 Unchecked, 11.81ms Time], IncrementalHoareTripleChecker [36 Valid, 810 Invalid, 1 Unknown, 0 Unchecked, 6354.34ms Time] [2021-11-13 02:30:57,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-13 02:30:57,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-13 02:30:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1123 states have (on average 1.2297417631344614) internal successors, (1381), 1158 states have internal predecessors, (1381), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:30:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2189 transitions. [2021-11-13 02:30:57,893 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2189 transitions. Word has length 227 [2021-11-13 02:30:57,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:57,894 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2189 transitions. [2021-11-13 02:30:57,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:30:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2189 transitions. [2021-11-13 02:30:57,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-13 02:30:57,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:57,900 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 02:30:57,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:58,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:58,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:30:58,315 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:30:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:58,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1318612792, now seen corresponding path program 1 times [2021-11-13 02:30:58,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:30:58,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608881041] [2021-11-13 02:30:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:58,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:30:58,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:30:58,319 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:30:58,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:31:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:03,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:31:03,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:31:04,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 02:31:05,672 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:05,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608881041] [2021-11-13 02:31:05,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608881041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:05,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [95549617] [2021-11-13 02:31:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:05,673 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:31:05,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:31:05,684 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:31:05,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-13 02:31:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:07,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:31:07,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:31:09,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:31:10,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [95549617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:31:10,501 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:31:10,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [15, 15] total 21 [2021-11-13 02:31:10,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397613041] [2021-11-13 02:31:10,502 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:10,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:31:10,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:10,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:31:10,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:31:10,504 INFO L87 Difference]: Start difference. First operand 1641 states and 2189 transitions. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:31:12,918 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:17,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:17,559 INFO L93 Difference]: Finished difference Result 3259 states and 4356 transitions. [2021-11-13 02:31:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:31:17,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) Word has length 228 [2021-11-13 02:31:17,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:17,570 INFO L225 Difference]: With dead ends: 3259 [2021-11-13 02:31:17,570 INFO L226 Difference]: Without dead ends: 1641 [2021-11-13 02:31:17,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 889 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:31:17,576 INFO L933 BasicCegarLoop]: 2187 mSDtfsCounter, 3351 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 786 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6285.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3351 SdHoareTripleChecker+Valid, 3565 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.92ms SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6867.68ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:17,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3351 Valid, 3565 Invalid, 1597 Unknown, 0 Unchecked, 15.92ms Time], IncrementalHoareTripleChecker [786 Valid, 810 Invalid, 1 Unknown, 0 Unchecked, 6867.68ms Time] [2021-11-13 02:31:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-13 02:31:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-13 02:31:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1123 states have (on average 1.2288512911843277) internal successors, (1380), 1158 states have internal predecessors, (1380), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:31:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2188 transitions. [2021-11-13 02:31:17,722 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2188 transitions. Word has length 228 [2021-11-13 02:31:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:17,723 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2188 transitions. [2021-11-13 02:31:17,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 3 states have call successors, (62), 3 states have call predecessors, (62), 4 states have return successors, (56), 4 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-13 02:31:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2188 transitions. [2021-11-13 02:31:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-13 02:31:17,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:17,728 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:17,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-13 02:31:17,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:18,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:18,142 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash 221882167, now seen corresponding path program 1 times [2021-11-13 02:31:18,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:18,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995309531] [2021-11-13 02:31:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:18,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:18,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:18,147 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:18,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 02:31:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:23,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:31:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:31:24,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 02:31:26,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:26,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995309531] [2021-11-13 02:31:26,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995309531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:26,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [309053671] [2021-11-13 02:31:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:26,079 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:31:26,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:31:26,080 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:31:26,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-13 02:31:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:30,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:31:30,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-13 02:31:31,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:31:31,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [309053671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:31:31,884 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:31:31,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [15, 15] total 20 [2021-11-13 02:31:31,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729767452] [2021-11-13 02:31:31,885 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:31,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:31:31,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:31,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:31:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:31:31,887 INFO L87 Difference]: Start difference. First operand 1641 states and 2188 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-13 02:31:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:32,063 INFO L93 Difference]: Finished difference Result 2049 states and 2706 transitions. [2021-11-13 02:31:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:31:32,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 229 [2021-11-13 02:31:32,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:32,076 INFO L225 Difference]: With dead ends: 2049 [2021-11-13 02:31:32,076 INFO L226 Difference]: Without dead ends: 1643 [2021-11-13 02:31:32,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:31:32,079 INFO L933 BasicCegarLoop]: 2189 mSDtfsCounter, 14 mSDsluCounter, 4342 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6531 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.96ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.42ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:32,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 6531 Invalid, 3 Unknown, 0 Unchecked, 9.96ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 23.42ms Time] [2021-11-13 02:31:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-11-13 02:31:32,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1641. [2021-11-13 02:31:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1123 states have (on average 1.2279608192341942) internal successors, (1379), 1158 states have internal predecessors, (1379), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:31:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2187 transitions. [2021-11-13 02:31:32,229 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2187 transitions. Word has length 229 [2021-11-13 02:31:32,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:32,230 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2187 transitions. [2021-11-13 02:31:32,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-13 02:31:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2187 transitions. [2021-11-13 02:31:32,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-13 02:31:32,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:32,236 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-13 02:31:32,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:32,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:32,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:32,655 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash -309161971, now seen corresponding path program 1 times [2021-11-13 02:31:32,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:32,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635761990] [2021-11-13 02:31:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:32,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:32,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:32,659 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:32,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 02:31:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:37,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1963 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:31:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-13 02:31:39,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 3 proven. 57 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-11-13 02:31:40,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:40,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635761990] [2021-11-13 02:31:40,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635761990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:40,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1089907667] [2021-11-13 02:31:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:40,889 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:31:40,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:31:40,890 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:31:40,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-13 02:31:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:43,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1963 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:31:43,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-13 02:31:43,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-13 02:31:44,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1089907667] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:31:44,333 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:31:44,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [15, 15] total 20 [2021-11-13 02:31:44,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35213020] [2021-11-13 02:31:44,333 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:44,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:31:44,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:44,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:31:44,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:31:44,335 INFO L87 Difference]: Start difference. First operand 1641 states and 2187 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-13 02:31:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:44,529 INFO L93 Difference]: Finished difference Result 2052 states and 2709 transitions. [2021-11-13 02:31:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:31:44,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 255 [2021-11-13 02:31:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:44,542 INFO L225 Difference]: With dead ends: 2052 [2021-11-13 02:31:44,543 INFO L226 Difference]: Without dead ends: 1646 [2021-11-13 02:31:44,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:31:44,547 INFO L933 BasicCegarLoop]: 2186 mSDtfsCounter, 3 mSDsluCounter, 4364 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6550 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.40ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.65ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:44,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6550 Invalid, 9 Unknown, 0 Unchecked, 9.40ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 43.65ms Time] [2021-11-13 02:31:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-11-13 02:31:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1642. [2021-11-13 02:31:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1124 states have (on average 1.2277580071174377) internal successors, (1380), 1159 states have internal predecessors, (1380), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:31:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2188 transitions. [2021-11-13 02:31:44,718 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2188 transitions. Word has length 255 [2021-11-13 02:31:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:44,721 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 2188 transitions. [2021-11-13 02:31:44,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-13 02:31:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2188 transitions. [2021-11-13 02:31:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-13 02:31:44,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:44,727 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:44,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:45,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:45,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:31:45,146 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:45,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:45,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1752299779, now seen corresponding path program 1 times [2021-11-13 02:31:45,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:45,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631920795] [2021-11-13 02:31:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:45,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:45,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:45,153 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:45,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 02:31:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:50,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:31:50,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:31:51,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 02:31:53,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:53,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631920795] [2021-11-13 02:31:53,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631920795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:53,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1874811888] [2021-11-13 02:31:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:53,256 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:31:53,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:31:53,257 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:31:53,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-13 02:31:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:57,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:31:57,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-13 02:31:58,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-13 02:31:58,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1874811888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:31:58,770 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:31:58,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [15, 15] total 20 [2021-11-13 02:31:58,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665068674] [2021-11-13 02:31:58,770 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:31:58,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:31:58,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:58,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:31:58,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:31:58,772 INFO L87 Difference]: Start difference. First operand 1642 states and 2188 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-13 02:31:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:58,928 INFO L93 Difference]: Finished difference Result 2051 states and 2706 transitions. [2021-11-13 02:31:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:31:58,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 229 [2021-11-13 02:31:58,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:58,940 INFO L225 Difference]: With dead ends: 2051 [2021-11-13 02:31:58,940 INFO L226 Difference]: Without dead ends: 1644 [2021-11-13 02:31:58,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:31:58,944 INFO L933 BasicCegarLoop]: 2188 mSDtfsCounter, 14 mSDsluCounter, 4340 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6528 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.26ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:58,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 6528 Invalid, 3 Unknown, 0 Unchecked, 8.61ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 21.26ms Time] [2021-11-13 02:31:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-11-13 02:31:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1642. [2021-11-13 02:31:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1124 states have (on average 1.2268683274021353) internal successors, (1379), 1159 states have internal predecessors, (1379), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:31:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2187 transitions. [2021-11-13 02:31:59,087 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2187 transitions. Word has length 229 [2021-11-13 02:31:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:59,088 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 2187 transitions. [2021-11-13 02:31:59,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-13 02:31:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2187 transitions. [2021-11-13 02:31:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-13 02:31:59,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:59,093 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-13 02:31:59,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:59,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:59,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:31:59,515 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:59,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:59,516 INFO L85 PathProgramCache]: Analyzing trace with hash 304179853, now seen corresponding path program 1 times [2021-11-13 02:31:59,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:59,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171213669] [2021-11-13 02:31:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:59,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:59,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:59,521 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:59,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 02:32:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:04,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1963 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:32:04,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-13 02:32:06,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 3 proven. 57 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-11-13 02:32:07,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:07,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171213669] [2021-11-13 02:32:07,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171213669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:07,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [878955406] [2021-11-13 02:32:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:07,515 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:32:07,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:32:07,515 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:32:07,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-13 02:32:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:12,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1963 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:32:12,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-13 02:32:13,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-13 02:32:15,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [878955406] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:15,072 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:32:15,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [15, 15] total 26 [2021-11-13 02:32:15,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190272256] [2021-11-13 02:32:15,072 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:15,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:32:15,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:15,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:32:15,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-11-13 02:32:15,074 INFO L87 Difference]: Start difference. First operand 1642 states and 2187 transitions. Second operand has 10 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 4 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2021-11-13 02:32:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:16,951 INFO L93 Difference]: Finished difference Result 3268 states and 4364 transitions. [2021-11-13 02:32:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:32:16,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 4 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) Word has length 255 [2021-11-13 02:32:16,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:16,963 INFO L225 Difference]: With dead ends: 3268 [2021-11-13 02:32:16,963 INFO L226 Difference]: Without dead ends: 1649 [2021-11-13 02:32:16,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 992 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2021-11-13 02:32:16,969 INFO L933 BasicCegarLoop]: 2148 mSDtfsCounter, 5 mSDsluCounter, 17104 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1361.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19252 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.20ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1484.04ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:16,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 19252 Invalid, 425 Unknown, 0 Unchecked, 31.20ms Time], IncrementalHoareTripleChecker [2 Valid, 347 Invalid, 0 Unknown, 76 Unchecked, 1484.04ms Time] [2021-11-13 02:32:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-11-13 02:32:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1645. [2021-11-13 02:32:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1126 states have (on average 1.2264653641207814) internal successors, (1381), 1161 states have internal predecessors, (1381), 405 states have call successors, (405), 113 states have call predecessors, (405), 113 states have return successors, (405), 402 states have call predecessors, (405), 405 states have call successors, (405) [2021-11-13 02:32:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2191 transitions. [2021-11-13 02:32:17,131 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2191 transitions. Word has length 255 [2021-11-13 02:32:17,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:17,132 INFO L470 AbstractCegarLoop]: Abstraction has 1645 states and 2191 transitions. [2021-11-13 02:32:17,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 4 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2021-11-13 02:32:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2191 transitions. [2021-11-13 02:32:17,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-13 02:32:17,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:17,139 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:17,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:17,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:17,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:32:17,563 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:17,564 INFO L85 PathProgramCache]: Analyzing trace with hash -271618617, now seen corresponding path program 1 times [2021-11-13 02:32:17,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:17,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970489096] [2021-11-13 02:32:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:17,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:17,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:17,569 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:17,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 02:32:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:23,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:32:23,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:32:24,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 02:32:25,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:25,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970489096] [2021-11-13 02:32:25,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970489096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:25,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [237608962] [2021-11-13 02:32:25,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:25,915 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:32:25,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:32:25,916 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:32:25,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-13 02:32:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:32,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:32:32,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:32:33,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 02:32:34,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [237608962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:34,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066944442] [2021-11-13 02:32:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:34,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:34,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:34,356 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:34,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-13 02:32:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:35,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:32:35,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:32:36,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-13 02:32:37,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066944442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:37,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:32:37,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 15] total 18 [2021-11-13 02:32:37,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423913834] [2021-11-13 02:32:37,885 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:37,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 02:32:37,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:37,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 02:32:37,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:32:37,887 INFO L87 Difference]: Start difference. First operand 1645 states and 2191 transitions. Second operand has 18 states, 17 states have (on average 9.647058823529411) internal successors, (164), 16 states have internal predecessors, (164), 6 states have call successors, (54), 2 states have call predecessors, (54), 5 states have return successors, (52), 7 states have call predecessors, (52), 6 states have call successors, (52) [2021-11-13 02:32:40,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:40,912 INFO L93 Difference]: Finished difference Result 2071 states and 2728 transitions. [2021-11-13 02:32:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 02:32:40,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 9.647058823529411) internal successors, (164), 16 states have internal predecessors, (164), 6 states have call successors, (54), 2 states have call predecessors, (54), 5 states have return successors, (52), 7 states have call predecessors, (52), 6 states have call successors, (52) Word has length 229 [2021-11-13 02:32:40,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:40,942 INFO L225 Difference]: With dead ends: 2071 [2021-11-13 02:32:40,942 INFO L226 Difference]: Without dead ends: 1643 [2021-11-13 02:32:40,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1377 GetRequests, 1352 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-11-13 02:32:40,949 INFO L933 BasicCegarLoop]: 2154 mSDtfsCounter, 35 mSDsluCounter, 32233 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1904.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 34387 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.64ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2022.70ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:40,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 34387 Invalid, 615 Unknown, 0 Unchecked, 44.64ms Time], IncrementalHoareTripleChecker [29 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 2022.70ms Time] [2021-11-13 02:32:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-11-13 02:32:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1643. [2021-11-13 02:32:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1125 states have (on average 1.2257777777777779) internal successors, (1379), 1160 states have internal predecessors, (1379), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:32:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2187 transitions. [2021-11-13 02:32:41,137 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2187 transitions. Word has length 229 [2021-11-13 02:32:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:41,138 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 2187 transitions. [2021-11-13 02:32:41,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 9.647058823529411) internal successors, (164), 16 states have internal predecessors, (164), 6 states have call successors, (54), 2 states have call predecessors, (54), 5 states have return successors, (52), 7 states have call predecessors, (52), 6 states have call successors, (52) [2021-11-13 02:32:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2187 transitions. [2021-11-13 02:32:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-13 02:32:41,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:41,146 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-11-13 02:32:41,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:41,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:41,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:41,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:41,769 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:41,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1321439490, now seen corresponding path program 1 times [2021-11-13 02:32:41,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:41,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074895497] [2021-11-13 02:32:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:41,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:41,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:41,775 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:41,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-13 02:32:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 02:32:47,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 229 proven. 3 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2021-11-13 02:32:48,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2021-11-13 02:32:50,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:50,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074895497] [2021-11-13 02:32:50,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074895497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:50,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1307035488] [2021-11-13 02:32:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:50,115 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:32:50,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:32:50,134 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:32:50,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-13 02:32:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:55,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 02:32:55,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-13 02:32:56,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2021-11-13 02:32:58,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1307035488] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:58,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:58,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8, 6] total 13 [2021-11-13 02:32:58,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623763493] [2021-11-13 02:32:58,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:58,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:32:58,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:58,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:32:58,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:32:58,159 INFO L87 Difference]: Start difference. First operand 1643 states and 2187 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 3 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-13 02:32:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:58,613 INFO L93 Difference]: Finished difference Result 3269 states and 4351 transitions. [2021-11-13 02:32:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:32:58,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 3 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) Word has length 309 [2021-11-13 02:32:58,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:58,638 INFO L225 Difference]: With dead ends: 3269 [2021-11-13 02:32:58,640 INFO L226 Difference]: Without dead ends: 1643 [2021-11-13 02:32:58,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1233 GetRequests, 1221 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:32:58,649 INFO L933 BasicCegarLoop]: 2178 mSDtfsCounter, 736 mSDsluCounter, 7733 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 9911 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.79ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:58,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 9911 Invalid, 12 Unknown, 0 Unchecked, 22.01ms Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 81.79ms Time] [2021-11-13 02:32:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-11-13 02:32:58,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1643. [2021-11-13 02:32:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1125 states have (on average 1.224888888888889) internal successors, (1378), 1159 states have internal predecessors, (1378), 404 states have call successors, (404), 113 states have call predecessors, (404), 113 states have return successors, (404), 401 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-13 02:32:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2186 transitions. [2021-11-13 02:32:58,828 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2186 transitions. Word has length 309 [2021-11-13 02:32:58,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:58,828 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 2186 transitions. [2021-11-13 02:32:58,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 3 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-13 02:32:58,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2186 transitions. [2021-11-13 02:32:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-13 02:32:58,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:58,837 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 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] [2021-11-13 02:32:58,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:59,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:59,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:59,263 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:59,264 INFO L85 PathProgramCache]: Analyzing trace with hash -720418043, now seen corresponding path program 1 times [2021-11-13 02:32:59,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:59,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261173668] [2021-11-13 02:32:59,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:59,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:59,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:59,269 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:59,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4900f04-cf0f-4ea7-b737-4180b7f94470/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process