./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8 --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 d88455bf5089be24833f69dfcbd91003e7e136bcd5efcd63ae18e59d7f59e87d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:55:33,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:55:33,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:55:33,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:55:33,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:55:33,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:55:33,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:55:33,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:55:33,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:55:33,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:55:33,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:55:33,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:55:33,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:55:33,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:55:33,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:55:33,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:55:33,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:55:33,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:55:33,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:55:33,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:55:33,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:55:33,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:55:33,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:55:33,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:55:33,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:55:33,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:55:33,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:55:33,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:55:33,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:55:33,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:55:33,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:55:33,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:55:33,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:55:33,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:55:33,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:55:33,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:55:33,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:55:33,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:55:33,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:55:33,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:55:33,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:55:33,325 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 00:55:33,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:55:33,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:55:33,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:55:33,368 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:55:33,368 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:55:33,369 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:55:33,369 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:55:33,369 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:55:33,370 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:55:33,370 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:55:33,371 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:55:33,372 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:55:33,372 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:55:33,373 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:55:33,373 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:55:33,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:55:33,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:55:33,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:55:33,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:55:33,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:55:33,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:55:33,375 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:55:33,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:55:33,376 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:55:33,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:55:33,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:55:33,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:55:33,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:33,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:55:33,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:55:33,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:55:33,381 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:55:33,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:55:33,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:55:33,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:55:33,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:55:33,383 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_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d88455bf5089be24833f69dfcbd91003e7e136bcd5efcd63ae18e59d7f59e87d [2021-11-07 00:55:33,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:55:33,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:55:33,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:55:33,753 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:55:33,754 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:55:33,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2021-11-07 00:55:33,868 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/data/f5049e87a/99e5c19b96b24b5d8add031eae359419/FLAG87f2982bc [2021-11-07 00:55:34,872 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:55:34,873 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2021-11-07 00:55:34,932 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/data/f5049e87a/99e5c19b96b24b5d8add031eae359419/FLAG87f2982bc [2021-11-07 00:55:35,340 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/data/f5049e87a/99e5c19b96b24b5d8add031eae359419 [2021-11-07 00:55:35,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:55:35,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:55:35,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:35,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:55:35,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:55:35,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:35" (1/1) ... [2021-11-07 00:55:35,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5422a4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:35, skipping insertion in model container [2021-11-07 00:55:35,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:35" (1/1) ... [2021-11-07 00:55:35,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:55:35,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:55:36,632 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_60545955-03a6-4624-9618-4305f0955eb1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i[205251,205264] [2021-11-07 00:55:36,819 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:36,821 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:36,840 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:36,840 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,071 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,105 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,145 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,184 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,246 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,255 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,264 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,273 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,282 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,289 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,296 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,314 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,369 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,377 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,380 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,392 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,411 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,418 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,418 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,419 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,430 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,467 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,473 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,489 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,497 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,505 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,513 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,525 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,534 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,568 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,578 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,597 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,598 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,599 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,604 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,604 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,605 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,605 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,605 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,606 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,606 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,607 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,658 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:55:37,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:37,754 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) [2021-11-07 00:55:37,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4cb632be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:37, skipping insertion in model container [2021-11-07 00:55:37,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:37,756 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:55:37,758 INFO L168 Benchmark]: Toolchain (without parser) took 2409.74 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 77.8 MB in the beginning and 91.2 MB in the end (delta: -13.4 MB). Peak memory consumption was 37.2 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:37,759 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory is still 42.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:55:37,759 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2406.89 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 77.8 MB in the beginning and 91.2 MB in the end (delta: -13.4 MB). Peak memory consumption was 37.2 MB. Max. memory is 16.1 GB. [2021-11-07 00:55:37,761 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory is still 42.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2406.89 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 77.8 MB in the beginning and 91.2 MB in the end (delta: -13.4 MB). Peak memory consumption was 37.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7334]: 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_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8 --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 d88455bf5089be24833f69dfcbd91003e7e136bcd5efcd63ae18e59d7f59e87d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:55:40,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:55:40,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:55:40,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:55:40,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:55:40,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:55:40,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:55:40,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:55:40,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:55:40,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:55:40,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:55:40,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:55:40,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:55:40,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:55:40,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:55:40,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:55:40,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:55:40,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:55:40,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:55:40,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:55:40,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:55:40,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:55:40,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:55:40,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:55:40,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:55:40,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:55:40,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:55:40,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:55:40,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:55:40,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:55:40,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:55:40,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:55:40,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:55:40,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:55:40,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:55:40,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:55:40,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:55:40,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:55:40,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:55:40,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:55:40,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:55:40,497 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 00:55:40,553 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:55:40,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:55:40,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:55:40,555 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:55:40,555 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:55:40,558 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:55:40,561 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:55:40,561 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:55:40,562 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:55:40,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:55:40,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:55:40,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:55:40,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:55:40,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:55:40,566 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:55:40,566 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:55:40,566 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:55:40,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:55:40,567 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:55:40,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:55:40,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:55:40,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:55:40,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:55:40,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:40,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:55:40,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:55:40,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:55:40,570 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:55:40,570 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:55:40,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:55:40,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:55:40,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:55:40,571 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_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d88455bf5089be24833f69dfcbd91003e7e136bcd5efcd63ae18e59d7f59e87d [2021-11-07 00:55:41,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:55:41,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:55:41,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:55:41,124 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:55:41,125 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:55:41,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2021-11-07 00:55:41,216 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/data/f4c60b6ff/a36c679f6d8a4b56ac8de7da127ae966/FLAGa0191e933 [2021-11-07 00:55:42,443 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:55:42,444 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2021-11-07 00:55:42,490 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/data/f4c60b6ff/a36c679f6d8a4b56ac8de7da127ae966/FLAGa0191e933 [2021-11-07 00:55:42,796 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/data/f4c60b6ff/a36c679f6d8a4b56ac8de7da127ae966 [2021-11-07 00:55:42,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:55:42,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:55:42,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:42,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:55:42,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:55:42,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:42" (1/1) ... [2021-11-07 00:55:42,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d42133a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:42, skipping insertion in model container [2021-11-07 00:55:42,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:55:42" (1/1) ... [2021-11-07 00:55:42,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:55:43,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:55:44,285 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_60545955-03a6-4624-9618-4305f0955eb1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i[205251,205264] [2021-11-07 00:55:45,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:45,617 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:55:45,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:55:45,927 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_60545955-03a6-4624-9618-4305f0955eb1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i[205251,205264] [2021-11-07 00:55:46,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:46,219 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:55:46,413 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_60545955-03a6-4624-9618-4305f0955eb1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i[205251,205264] [2021-11-07 00:55:46,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:55:46,853 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:55:46,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:46 WrapperNode [2021-11-07 00:55:46,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:55:46,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:55:46,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:55:46,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:55:46,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:46" (1/1) ... [2021-11-07 00:55:46,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:46" (1/1) ... [2021-11-07 00:55:47,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:55:47,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:55:47,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:55:47,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:55:47,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:46" (1/1) ... [2021-11-07 00:55:47,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:46" (1/1) ... [2021-11-07 00:55:47,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:46" (1/1) ... [2021-11-07 00:55:47,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:46" (1/1) ... [2021-11-07 00:55:48,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:46" (1/1) ... [2021-11-07 00:55:48,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:46" (1/1) ... [2021-11-07 00:55:48,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:46" (1/1) ... [2021-11-07 00:55:48,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:55:48,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:55:48,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:55:48,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:55:48,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:46" (1/1) ... [2021-11-07 00:55:48,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:55:48,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:55:48,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:55:48,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:55:48,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 00:55:48,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 00:55:48,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 00:55:48,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 00:55:48,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 00:55:48,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 00:55:48,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:55:48,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 00:55:48,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2021-11-07 00:55:48,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 00:55:48,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 00:55:48,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 00:55:48,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 00:55:48,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 00:55:48,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 00:55:48,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 00:55:48,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:55:48,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 00:55:48,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 00:55:48,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 00:55:48,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 00:55:48,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 00:55:48,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 00:55:48,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 00:55:48,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 00:55:48,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 00:55:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 00:55:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 00:55:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 00:55:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:55:48,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:00:05,989 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:00:05,989 INFO L299 CfgBuilder]: Removed 2280 assume(true) statements. [2021-11-07 01:00:05,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:00:05 BoogieIcfgContainer [2021-11-07 01:00:05,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:00:05,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:00:05,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:00:06,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:00:06,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:55:42" (1/3) ... [2021-11-07 01:00:06,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79925023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:00:06, skipping insertion in model container [2021-11-07 01:00:06,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:55:46" (2/3) ... [2021-11-07 01:00:06,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79925023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:00:06, skipping insertion in model container [2021-11-07 01:00:06,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:00:05" (3/3) ... [2021-11-07 01:00:06,007 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2021-11-07 01:00:06,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:00:06,014 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:00:06,116 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:00:06,122 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 [2021-11-07 01:00:06,123 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:00:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 2753 states, 2751 states have (on average 1.490367139222101) internal successors, (4100), 2752 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:00:06,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:06,245 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:06,247 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:00:06,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:06,256 INFO L85 PathProgramCache]: Analyzing trace with hash -883522735, now seen corresponding path program 1 times [2021-11-07 01:00:06,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:06,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183523959] [2021-11-07 01:00:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:06,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:06,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:06,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:06,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:00:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:20,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 4243 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:00:20,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:21,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:21,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:21,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183523959] [2021-11-07 01:00:21,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183523959] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:21,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:21,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:00:21,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535896933] [2021-11-07 01:00:21,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:00:21,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:21,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:00:21,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:00:21,597 INFO L87 Difference]: Start difference. First operand has 2753 states, 2751 states have (on average 1.490367139222101) internal successors, (4100), 2752 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:24,004 INFO L93 Difference]: Finished difference Result 5528 states and 8247 transitions. [2021-11-07 01:00:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:00:24,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 01:00:24,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:24,039 INFO L225 Difference]: With dead ends: 5528 [2021-11-07 01:00:24,039 INFO L226 Difference]: Without dead ends: 2771 [2021-11-07 01:00:24,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:00:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-11-07 01:00:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2771. [2021-11-07 01:00:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2770 states have (on average 1.4534296028880866) internal successors, (4026), 2770 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 4026 transitions. [2021-11-07 01:00:24,376 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 4026 transitions. Word has length 38 [2021-11-07 01:00:24,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:24,379 INFO L470 AbstractCegarLoop]: Abstraction has 2771 states and 4026 transitions. [2021-11-07 01:00:24,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 4026 transitions. [2021-11-07 01:00:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:00:24,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:24,388 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:00:24,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:00:24,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:24,604 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:00:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:24,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1272915912, now seen corresponding path program 1 times [2021-11-07 01:00:24,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:24,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348084479] [2021-11-07 01:00:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:24,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:24,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:24,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:24,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:00:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:38,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 4258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:00:38,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:00:39,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:00:40,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:40,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348084479] [2021-11-07 01:00:40,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348084479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:00:40,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1553103878] [2021-11-07 01:00:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:40,248 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:00:40,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:00:40,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:00:40,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 01:00:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:44,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 4258 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:00:44,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:00:44,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:00:44,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1553103878] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:44,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:00:44,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:00:44,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785579573] [2021-11-07 01:00:44,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:00:44,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:44,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:00:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:00:44,940 INFO L87 Difference]: Start difference. First operand 2771 states and 4026 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:48,309 INFO L93 Difference]: Finished difference Result 10859 states and 15838 transitions. [2021-11-07 01:00:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:00:48,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 01:00:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:48,363 INFO L225 Difference]: With dead ends: 10859 [2021-11-07 01:00:48,363 INFO L226 Difference]: Without dead ends: 8138 [2021-11-07 01:00:48,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:00:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8138 states. [2021-11-07 01:00:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8138 to 8138. [2021-11-07 01:00:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8138 states, 8137 states have (on average 1.4585227970996681) internal successors, (11868), 8137 states have internal predecessors, (11868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8138 states to 8138 states and 11868 transitions. [2021-11-07 01:00:48,699 INFO L78 Accepts]: Start accepts. Automaton has 8138 states and 11868 transitions. Word has length 41 [2021-11-07 01:00:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:48,699 INFO L470 AbstractCegarLoop]: Abstraction has 8138 states and 11868 transitions. [2021-11-07 01:00:48,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:48,700 INFO L276 IsEmpty]: Start isEmpty. Operand 8138 states and 11868 transitions. [2021-11-07 01:00:48,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:00:48,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:48,705 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:00:48,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:48,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:49,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:00:49,132 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:00:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:49,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1100386591, now seen corresponding path program 1 times [2021-11-07 01:00:49,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:49,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54144979] [2021-11-07 01:00:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:49,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:49,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:49,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:49,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:01:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:03,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 4312 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:01:03,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:01:03,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:01:04,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:04,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54144979] [2021-11-07 01:01:04,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54144979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:01:04,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933319066] [2021-11-07 01:01:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:04,749 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:01:04,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:01:04,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:01:04,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:01:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:08,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 4312 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:01:08,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:01:09,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:01:10,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1933319066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:10,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:01:10,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-07 01:01:10,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440452469] [2021-11-07 01:01:10,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:01:10,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:10,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:01:10,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:01:10,188 INFO L87 Difference]: Start difference. First operand 8138 states and 11868 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:12,415 INFO L93 Difference]: Finished difference Result 24312 states and 35483 transitions. [2021-11-07 01:01:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:01:12,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:01:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:12,529 INFO L225 Difference]: With dead ends: 24312 [2021-11-07 01:01:12,529 INFO L226 Difference]: Without dead ends: 16214 [2021-11-07 01:01:12,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:01:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16214 states. [2021-11-07 01:01:13,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16214 to 16190. [2021-11-07 01:01:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16190 states, 16189 states have (on average 1.459509543517203) internal successors, (23628), 16189 states have internal predecessors, (23628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16190 states to 16190 states and 23628 transitions. [2021-11-07 01:01:13,274 INFO L78 Accepts]: Start accepts. Automaton has 16190 states and 23628 transitions. Word has length 49 [2021-11-07 01:01:13,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:13,275 INFO L470 AbstractCegarLoop]: Abstraction has 16190 states and 23628 transitions. [2021-11-07 01:01:13,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 16190 states and 23628 transitions. [2021-11-07 01:01:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:01:13,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:13,286 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:01:13,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:13,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:13,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:01:13,714 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:01:13,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:13,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1536852503, now seen corresponding path program 1 times [2021-11-07 01:01:13,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:13,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596255938] [2021-11-07 01:01:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:13,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:13,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:13,725 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:13,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:01:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:28,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 4399 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:01:28,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:01:29,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:01:30,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:30,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596255938] [2021-11-07 01:01:30,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596255938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:01:30,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [121114486] [2021-11-07 01:01:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:30,157 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:01:30,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:01:30,169 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:01:30,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:01:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:33,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 4399 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:01:33,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:01:34,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:01:34,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [121114486] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:34,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:01:34,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:01:34,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769192501] [2021-11-07 01:01:34,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:01:34,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:34,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:01:34,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:01:34,913 INFO L87 Difference]: Start difference. First operand 16190 states and 23628 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:36,472 INFO L93 Difference]: Finished difference Result 35270 states and 51370 transitions. [2021-11-07 01:01:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:01:36,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 01:01:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:36,527 INFO L225 Difference]: With dead ends: 35270 [2021-11-07 01:01:36,528 INFO L226 Difference]: Without dead ends: 19130 [2021-11-07 01:01:36,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:01:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19130 states. [2021-11-07 01:01:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19130 to 19118. [2021-11-07 01:01:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19118 states, 19117 states have (on average 1.45336611393001) internal successors, (27784), 19117 states have internal predecessors, (27784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19118 states to 19118 states and 27784 transitions. [2021-11-07 01:01:37,110 INFO L78 Accepts]: Start accepts. Automaton has 19118 states and 27784 transitions. Word has length 80 [2021-11-07 01:01:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:37,112 INFO L470 AbstractCegarLoop]: Abstraction has 19118 states and 27784 transitions. [2021-11-07 01:01:37,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:37,112 INFO L276 IsEmpty]: Start isEmpty. Operand 19118 states and 27784 transitions. [2021-11-07 01:01:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:01:37,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:37,120 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:01:37,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:37,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:37,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:01:37,542 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:01:37,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:37,543 INFO L85 PathProgramCache]: Analyzing trace with hash -200756473, now seen corresponding path program 1 times [2021-11-07 01:01:37,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:37,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313518454] [2021-11-07 01:01:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:37,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:37,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:37,556 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:37,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:01:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:51,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 4443 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:01:51,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:01:52,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:01:53,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:53,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313518454] [2021-11-07 01:01:53,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313518454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:01:53,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1843952778] [2021-11-07 01:01:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:53,420 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:01:53,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:01:53,421 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:01:53,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:01:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:57,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 4443 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:01:57,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:01:57,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:01:58,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1843952778] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:58,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:01:58,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:01:58,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217607252] [2021-11-07 01:01:58,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:01:58,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:58,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:01:58,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:01:58,328 INFO L87 Difference]: Start difference. First operand 19118 states and 27784 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:59,767 INFO L93 Difference]: Finished difference Result 51688 states and 75354 transitions. [2021-11-07 01:01:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:01:59,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:01:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:59,853 INFO L225 Difference]: With dead ends: 51688 [2021-11-07 01:01:59,853 INFO L226 Difference]: Without dead ends: 32620 [2021-11-07 01:01:59,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:01:59,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32620 states. [2021-11-07 01:02:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32620 to 32576. [2021-11-07 01:02:00,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32576 states, 32575 states have (on average 1.460107444359171) internal successors, (47563), 32575 states have internal predecessors, (47563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32576 states to 32576 states and 47563 transitions. [2021-11-07 01:02:00,821 INFO L78 Accepts]: Start accepts. Automaton has 32576 states and 47563 transitions. Word has length 84 [2021-11-07 01:02:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:00,821 INFO L470 AbstractCegarLoop]: Abstraction has 32576 states and 47563 transitions. [2021-11-07 01:02:00,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 32576 states and 47563 transitions. [2021-11-07 01:02:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:02:00,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:00,841 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-07 01:02:00,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:01,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-07 01:02:01,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:02:01,262 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:01,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:01,263 INFO L85 PathProgramCache]: Analyzing trace with hash -735522118, now seen corresponding path program 1 times [2021-11-07 01:02:01,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:01,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399916330] [2021-11-07 01:02:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:01,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:01,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:01,270 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:01,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:02:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 4449 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:02:15,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:02:16,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:02:18,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:18,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399916330] [2021-11-07 01:02:18,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399916330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:02:18,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1657793994] [2021-11-07 01:02:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:18,097 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:02:18,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:02:18,098 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:02:18,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 01:02:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:21,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 4449 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:02:21,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:02:22,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:02:22,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1657793994] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:22,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:02:22,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:02:22,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266049130] [2021-11-07 01:02:22,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:02:22,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:22,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:02:22,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:02:22,751 INFO L87 Difference]: Start difference. First operand 32576 states and 47563 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:24,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:24,679 INFO L93 Difference]: Finished difference Result 87812 states and 128379 transitions. [2021-11-07 01:02:24,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:02:24,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 01:02:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:24,818 INFO L225 Difference]: With dead ends: 87812 [2021-11-07 01:02:24,818 INFO L226 Difference]: Without dead ends: 55286 [2021-11-07 01:02:24,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:02:24,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55286 states. [2021-11-07 01:02:26,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55286 to 32576. [2021-11-07 01:02:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32576 states, 32575 states have (on average 1.4597390636991558) internal successors, (47551), 32575 states have internal predecessors, (47551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32576 states to 32576 states and 47551 transitions. [2021-11-07 01:02:26,275 INFO L78 Accepts]: Start accepts. Automaton has 32576 states and 47551 transitions. Word has length 96 [2021-11-07 01:02:26,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:26,276 INFO L470 AbstractCegarLoop]: Abstraction has 32576 states and 47551 transitions. [2021-11-07 01:02:26,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:26,277 INFO L276 IsEmpty]: Start isEmpty. Operand 32576 states and 47551 transitions. [2021-11-07 01:02:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:02:26,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:26,302 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-07 01:02:26,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:26,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-07 01:02:26,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:02:26,716 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:26,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:26,716 INFO L85 PathProgramCache]: Analyzing trace with hash 285546236, now seen corresponding path program 1 times [2021-11-07 01:02:26,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:26,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833946704] [2021-11-07 01:02:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:26,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:26,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:26,728 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:26,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:02:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:41,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 4451 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:02:41,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:02:42,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:02:43,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:43,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833946704] [2021-11-07 01:02:43,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833946704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:02:43,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [776318431] [2021-11-07 01:02:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:43,799 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:02:43,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:02:43,799 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:02:43,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:02:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:48,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 4451 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:02:48,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:02:49,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:02:50,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [776318431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:02:50,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805163079] [2021-11-07 01:02:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:50,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:02:50,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:02:50,612 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:02:50,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 01:02:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 4451 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:02:57,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:02:58,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:02:59,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805163079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:02:59,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:02:59,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 4, 4] total 12 [2021-11-07 01:02:59,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290192737] [2021-11-07 01:02:59,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:02:59,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:59,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:02:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:02:59,343 INFO L87 Difference]: Start difference. First operand 32576 states and 47551 transitions. Second operand has 12 states, 12 states have (on average 18.333333333333332) internal successors, (220), 12 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:44,684 INFO L93 Difference]: Finished difference Result 230873 states and 338806 transitions. [2021-11-07 01:03:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 01:03:44,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.333333333333332) internal successors, (220), 12 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 01:03:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:45,309 INFO L225 Difference]: With dead ends: 230873 [2021-11-07 01:03:45,309 INFO L226 Difference]: Without dead ends: 198343 [2021-11-07 01:03:45,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=460, Invalid=1520, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 01:03:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198343 states. [2021-11-07 01:03:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198343 to 176520. [2021-11-07 01:03:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176520 states, 176519 states have (on average 1.4548915414204704) internal successors, (256816), 176519 states have internal predecessors, (256816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176520 states to 176520 states and 256816 transitions. [2021-11-07 01:03:52,488 INFO L78 Accepts]: Start accepts. Automaton has 176520 states and 256816 transitions. Word has length 96 [2021-11-07 01:03:52,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:52,488 INFO L470 AbstractCegarLoop]: Abstraction has 176520 states and 256816 transitions. [2021-11-07 01:03:52,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.333333333333332) internal successors, (220), 12 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 176520 states and 256816 transitions. [2021-11-07 01:03:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-07 01:03:52,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:52,536 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:52,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:52,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:52,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:53,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:53,138 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:53,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:53,138 INFO L85 PathProgramCache]: Analyzing trace with hash -278101809, now seen corresponding path program 1 times [2021-11-07 01:03:53,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:53,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091872231] [2021-11-07 01:03:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:53,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:53,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:53,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:53,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:04:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:08,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 4546 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:04:08,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 01:04:09,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 01:04:11,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:11,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091872231] [2021-11-07 01:04:11,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091872231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:11,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [713909650] [2021-11-07 01:04:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:11,699 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:11,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:11,700 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:11,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:04:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:15,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 4546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:15,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:04:16,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:04:17,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [713909650] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:17,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:17,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-07 01:04:17,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509728669] [2021-11-07 01:04:17,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:17,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:17,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:17,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:04:17,207 INFO L87 Difference]: Start difference. First operand 176520 states and 256816 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:24,069 INFO L93 Difference]: Finished difference Result 294305 states and 428204 transitions. [2021-11-07 01:04:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:24,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-07 01:04:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:24,301 INFO L225 Difference]: With dead ends: 294305 [2021-11-07 01:04:24,302 INFO L226 Difference]: Without dead ends: 117827 [2021-11-07 01:04:24,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:04:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117827 states. [2021-11-07 01:04:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117827 to 117643. [2021-11-07 01:04:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117643 states, 117642 states have (on average 1.4552880773873276) internal successors, (171203), 117642 states have internal predecessors, (171203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117643 states to 117643 states and 171203 transitions. [2021-11-07 01:04:28,938 INFO L78 Accepts]: Start accepts. Automaton has 117643 states and 171203 transitions. Word has length 107 [2021-11-07 01:04:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:28,938 INFO L470 AbstractCegarLoop]: Abstraction has 117643 states and 171203 transitions. [2021-11-07 01:04:28,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 117643 states and 171203 transitions. [2021-11-07 01:04:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 01:04:28,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:28,976 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:29,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:04:29,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:29,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:29,377 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:04:29,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:29,378 INFO L85 PathProgramCache]: Analyzing trace with hash -176448539, now seen corresponding path program 1 times [2021-11-07 01:04:29,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:29,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277721253] [2021-11-07 01:04:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:29,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:29,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:29,387 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:29,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:04:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:45,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 4525 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:04:45,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-07 01:04:46,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-07 01:04:48,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:48,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277721253] [2021-11-07 01:04:48,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277721253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:48,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [887504695] [2021-11-07 01:04:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:48,241 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:48,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:48,242 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:48,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:04:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:52,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 4525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:04:53,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:04:54,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [887504695] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:54,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:54,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-07 01:04:54,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428377110] [2021-11-07 01:04:54,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:54,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:54,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:54,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:04:54,560 INFO L87 Difference]: Start difference. First operand 117643 states and 171203 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:59,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:59,859 INFO L93 Difference]: Finished difference Result 176417 states and 256781 transitions. [2021-11-07 01:04:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:04:59,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-07 01:04:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:59,941 INFO L225 Difference]: With dead ends: 176417 [2021-11-07 01:04:59,941 INFO L226 Difference]: Without dead ends: 58620 [2021-11-07 01:05:00,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:05:00,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58620 states. [2021-11-07 01:05:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58620 to 58568. [2021-11-07 01:05:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58568 states, 58567 states have (on average 1.454163607492274) internal successors, (85166), 58567 states have internal predecessors, (85166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58568 states to 58568 states and 85166 transitions. [2021-11-07 01:05:02,011 INFO L78 Accepts]: Start accepts. Automaton has 58568 states and 85166 transitions. Word has length 108 [2021-11-07 01:05:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:02,011 INFO L470 AbstractCegarLoop]: Abstraction has 58568 states and 85166 transitions. [2021-11-07 01:05:02,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 58568 states and 85166 transitions. [2021-11-07 01:05:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 01:05:02,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:02,029 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-07 01:05:02,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:02,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:02,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:02,429 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:05:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:02,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1924515391, now seen corresponding path program 1 times [2021-11-07 01:05:02,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:02,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930242562] [2021-11-07 01:05:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:02,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:02,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:02,438 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:02,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:05:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:18,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 4526 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:05:18,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 01:05:19,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 01:05:20,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:20,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930242562] [2021-11-07 01:05:20,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930242562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:20,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [646128226] [2021-11-07 01:05:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:20,943 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:20,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:20,944 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:20,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:05:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:25,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 4526 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:25,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:05:26,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:05:27,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [646128226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:27,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:05:27,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-07 01:05:27,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610871545] [2021-11-07 01:05:27,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:05:27,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:27,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:05:27,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:05:27,485 INFO L87 Difference]: Start difference. First operand 58568 states and 85166 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:32,823 INFO L93 Difference]: Finished difference Result 141200 states and 205577 transitions. [2021-11-07 01:05:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:05:32,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-07 01:05:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:32,955 INFO L225 Difference]: With dead ends: 141200 [2021-11-07 01:05:32,956 INFO L226 Difference]: Without dead ends: 82738 [2021-11-07 01:05:33,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:05:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82738 states. [2021-11-07 01:05:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82738 to 82736. [2021-11-07 01:05:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82736 states, 82735 states have (on average 1.456167281078141) internal successors, (120476), 82735 states have internal predecessors, (120476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82736 states to 82736 states and 120476 transitions. [2021-11-07 01:05:36,155 INFO L78 Accepts]: Start accepts. Automaton has 82736 states and 120476 transitions. Word has length 110 [2021-11-07 01:05:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:36,155 INFO L470 AbstractCegarLoop]: Abstraction has 82736 states and 120476 transitions. [2021-11-07 01:05:36,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:36,155 INFO L276 IsEmpty]: Start isEmpty. Operand 82736 states and 120476 transitions. [2021-11-07 01:05:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 01:05:36,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:36,171 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:36,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:36,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-07 01:05:36,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:36,576 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:05:36,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:36,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2057143962, now seen corresponding path program 1 times [2021-11-07 01:05:36,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:36,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046750119] [2021-11-07 01:05:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:36,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:36,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:36,589 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:36,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:05:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:52,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 4596 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:05:52,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 01:05:53,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 01:05:55,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:55,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046750119] [2021-11-07 01:05:55,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046750119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:55,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1040192912] [2021-11-07 01:05:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:55,174 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:55,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:55,175 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:55,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:05:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:59,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 4596 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:59,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:06:00,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 01:06:00,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1040192912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:00,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:06:00,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-07 01:06:00,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631446287] [2021-11-07 01:06:00,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:06:00,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:06:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:06:00,656 INFO L87 Difference]: Start difference. First operand 82736 states and 120476 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:05,549 INFO L93 Difference]: Finished difference Result 206372 states and 300578 transitions. [2021-11-07 01:06:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:06:05,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-07 01:06:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:05,804 INFO L225 Difference]: With dead ends: 206372 [2021-11-07 01:06:05,804 INFO L226 Difference]: Without dead ends: 164998 [2021-11-07 01:06:05,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:06:06,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164998 states. [2021-11-07 01:06:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164998 to 82776. [2021-11-07 01:06:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82776 states, 82775 states have (on average 1.4559468438538206) internal successors, (120516), 82775 states have internal predecessors, (120516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82776 states to 82776 states and 120516 transitions. [2021-11-07 01:06:10,025 INFO L78 Accepts]: Start accepts. Automaton has 82776 states and 120516 transitions. Word has length 123 [2021-11-07 01:06:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:10,025 INFO L470 AbstractCegarLoop]: Abstraction has 82776 states and 120516 transitions. [2021-11-07 01:06:10,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 82776 states and 120516 transitions. [2021-11-07 01:06:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 01:06:10,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:10,046 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:10,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 01:06:10,475 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forcibly destroying the process [2021-11-07 01:06:10,484 WARN L724 oredProcess$PipePump]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] The stream was forcibly closed: stdIn [2021-11-07 01:06:10,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:10,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:06:10,484 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:10,485 INFO L85 PathProgramCache]: Analyzing trace with hash 346058452, now seen corresponding path program 1 times [2021-11-07 01:06:10,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:10,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937745660] [2021-11-07 01:06:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:10,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:10,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:10,497 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:10,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:06:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:25,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 4532 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:06:25,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 01:06:27,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 01:06:28,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:28,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937745660] [2021-11-07 01:06:28,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937745660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:06:28,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [881637686] [2021-11-07 01:06:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:28,901 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:06:28,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:06:28,905 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:06:28,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60545955-03a6-4624-9618-4305f0955eb1/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:06:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:33,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 4532 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:06:33,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:06:34,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:06:35,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [881637686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:35,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:06:35,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-07 01:06:35,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110970870] [2021-11-07 01:06:35,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:35,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:35,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:35,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:06:35,540 INFO L87 Difference]: Start difference. First operand 82776 states and 120516 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)