./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.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_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/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_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/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_888b93c9-6bbd-46ef-8b47-9dd774b37d71/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 0b2aee7f7e67804021e49e5736bb0f9c1b2e215c216274214a3b77fa62ce19be --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:22:21,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:22:21,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:22:21,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:22:21,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:22:21,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:22:21,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:22:21,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:22:21,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:22:21,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:22:21,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:22:21,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:22:21,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:22:21,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:22:21,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:22:21,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:22:21,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:22:21,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:22:21,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:22:21,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:22:21,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:22:21,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:22:21,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:22:21,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:22:21,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:22:21,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:22:21,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:22:21,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:22:21,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:22:21,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:22:21,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:22:21,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:22:21,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:22:21,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:22:21,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:22:21,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:22:21,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:22:21,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:22:21,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:22:21,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:22:21,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:22:21,304 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:22:21,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:22:21,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:22:21,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:22:21,359 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:22:21,359 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:22:21,360 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:22:21,360 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:22:21,360 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:22:21,360 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:22:21,361 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:22:21,362 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:22:21,362 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:22:21,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:22:21,363 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:22:21,363 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:22:21,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:22:21,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:22:21,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:22:21,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:22:21,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:22:21,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:22:21,366 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:22:21,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:22:21,366 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:22:21,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:22:21,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:22:21,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:22:21,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:21,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:22:21,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:22:21,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:22:21,368 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:22:21,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:22:21,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:22:21,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:22:21,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:22:21,370 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_888b93c9-6bbd-46ef-8b47-9dd774b37d71/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b2aee7f7e67804021e49e5736bb0f9c1b2e215c216274214a3b77fa62ce19be [2021-11-07 01:22:21,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:22:21,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:22:21,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:22:21,761 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:22:21,762 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:22:21,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-07 01:22:21,857 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/data/71e46e3ff/90e314e3b7974a63b5c8bf5c1a10774c/FLAG9a833e728 [2021-11-07 01:22:22,887 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:22:22,888 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-07 01:22:22,941 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/data/71e46e3ff/90e314e3b7974a63b5c8bf5c1a10774c/FLAG9a833e728 [2021-11-07 01:22:23,294 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/data/71e46e3ff/90e314e3b7974a63b5c8bf5c1a10774c [2021-11-07 01:22:23,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:22:23,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:22:23,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:23,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:22:23,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:22:23,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:23" (1/1) ... [2021-11-07 01:22:23,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@666de765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:23, skipping insertion in model container [2021-11-07 01:22:23,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:23" (1/1) ... [2021-11-07 01:22:23,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:22:23,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:24,500 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 01:22:24,709 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_888b93c9-6bbd-46ef-8b47-9dd774b37d71/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[182154,182167] [2021-11-07 01:22:24,922 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 01:22:24,953 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 01:22:24,986 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 01:22:25,046 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 01:22:25,057 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 01:22:25,076 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:22:25,083 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 01:22:25,116 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 01:22:25,120 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 01:22:25,147 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 01:22:25,183 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 01:22:25,185 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:22:25,208 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 01:22:25,212 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 01:22:25,213 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 01:22:25,219 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 01:22:25,227 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 01:22:25,235 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 01:22:25,274 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 01:22:25,284 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 01:22:25,322 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 01:22:25,338 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 01:22:25,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:25,459 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 01:22:25,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@128fc5e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:25, skipping insertion in model container [2021-11-07 01:22:25,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:25,461 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:22:25,466 INFO L168 Benchmark]: Toolchain (without parser) took 2166.16 ms. Allocated memory was 83.9 MB in the beginning and 127.9 MB in the end (delta: 44.0 MB). Free memory was 57.2 MB in the beginning and 67.0 MB in the end (delta: -9.9 MB). Peak memory consumption was 42.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:22:25,467 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory was 56.8 MB in the beginning and 56.8 MB in the end (delta: 28.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:22:25,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2160.80 ms. Allocated memory was 83.9 MB in the beginning and 127.9 MB in the end (delta: 44.0 MB). Free memory was 57.0 MB in the beginning and 67.0 MB in the end (delta: -10.1 MB). Peak memory consumption was 42.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:22:25,472 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory was 56.8 MB in the beginning and 56.8 MB in the end (delta: 28.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2160.80 ms. Allocated memory was 83.9 MB in the beginning and 127.9 MB in the end (delta: 44.0 MB). Free memory was 57.0 MB in the beginning and 67.0 MB in the end (delta: -10.1 MB). Peak memory consumption was 42.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6186]: 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_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/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_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/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_888b93c9-6bbd-46ef-8b47-9dd774b37d71/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 0b2aee7f7e67804021e49e5736bb0f9c1b2e215c216274214a3b77fa62ce19be --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:22:27,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:22:27,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:22:28,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:22:28,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:22:28,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:22:28,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:22:28,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:22:28,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:22:28,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:22:28,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:22:28,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:22:28,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:22:28,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:22:28,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:22:28,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:22:28,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:22:28,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:22:28,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:22:28,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:22:28,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:22:28,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:22:28,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:22:28,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:22:28,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:22:28,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:22:28,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:22:28,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:22:28,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:22:28,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:22:28,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:22:28,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:22:28,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:22:28,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:22:28,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:22:28,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:22:28,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:22:28,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:22:28,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:22:28,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:22:28,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:22:28,158 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:22:28,206 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:22:28,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:22:28,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:22:28,209 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:22:28,209 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:22:28,209 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:22:28,209 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:22:28,210 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:22:28,210 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:22:28,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:22:28,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:22:28,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:22:28,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:22:28,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:22:28,214 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:22:28,214 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:22:28,214 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:22:28,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:22:28,215 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:22:28,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:22:28,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:22:28,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:22:28,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:22:28,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:28,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:22:28,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:22:28,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:22:28,217 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:22:28,217 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:28,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:22:28,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:22:28,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:22:28,218 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_888b93c9-6bbd-46ef-8b47-9dd774b37d71/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b2aee7f7e67804021e49e5736bb0f9c1b2e215c216274214a3b77fa62ce19be [2021-11-07 01:22:28,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:22:28,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:22:28,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:22:28,729 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:22:28,730 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:22:28,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-07 01:22:28,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/data/83d00cc92/1d4c00514c5940479edfde41b6f53b2a/FLAG7501ebb14 [2021-11-07 01:22:29,951 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:22:29,952 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-07 01:22:29,991 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/data/83d00cc92/1d4c00514c5940479edfde41b6f53b2a/FLAG7501ebb14 [2021-11-07 01:22:30,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/data/83d00cc92/1d4c00514c5940479edfde41b6f53b2a [2021-11-07 01:22:30,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:22:30,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:22:30,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:30,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:22:30,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:22:30,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:30" (1/1) ... [2021-11-07 01:22:30,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@392db8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:30, skipping insertion in model container [2021-11-07 01:22:30,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:30" (1/1) ... [2021-11-07 01:22:30,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:22:30,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:31,887 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_888b93c9-6bbd-46ef-8b47-9dd774b37d71/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[182154,182167] [2021-11-07 01:22:32,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:32,534 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:22:32,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:32,751 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_888b93c9-6bbd-46ef-8b47-9dd774b37d71/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[182154,182167] [2021-11-07 01:22:32,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:33,003 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:22:33,270 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_888b93c9-6bbd-46ef-8b47-9dd774b37d71/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[182154,182167] [2021-11-07 01:22:33,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:33,574 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:22:33,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:33 WrapperNode [2021-11-07 01:22:33,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:33,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:33,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:22:33,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:22:33,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:33" (1/1) ... [2021-11-07 01:22:33,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:33" (1/1) ... [2021-11-07 01:22:33,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:33,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:22:33,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:22:33,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:22:33,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:33" (1/1) ... [2021-11-07 01:22:33,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:33" (1/1) ... [2021-11-07 01:22:33,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:33" (1/1) ... [2021-11-07 01:22:33,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:33" (1/1) ... [2021-11-07 01:22:34,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:33" (1/1) ... [2021-11-07 01:22:34,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:33" (1/1) ... [2021-11-07 01:22:34,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:33" (1/1) ... [2021-11-07 01:22:34,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:22:34,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:22:34,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:22:34,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:22:34,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:33" (1/1) ... [2021-11-07 01:22:34,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:34,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:22:34,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:22:34,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:22:34,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:22:34,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:22:34,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:22:34,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:22:34,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:22:34,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:22:34,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-07 01:22:34,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-07 01:22:34,399 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_submit_rx_urb_fwload [2021-11-07 01:22:34,399 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_submit_rx_urb_fwload [2021-11-07 01:22:34,400 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_submit_rx_urb [2021-11-07 01:22:34,400 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_submit_rx_urb [2021-11-07 01:22:34,400 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_receive_fwload [2021-11-07 01:22:34,400 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_receive_fwload [2021-11-07 01:22:34,400 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_send_fw_pkt [2021-11-07 01:22:34,400 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_send_fw_pkt [2021-11-07 01:22:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure __if_usb_submit_rx_urb [2021-11-07 01:22:34,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __if_usb_submit_rx_urb [2021-11-07 01:22:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:22:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:22:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:22:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:22:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:22:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure usb_tx_block [2021-11-07 01:22:34,402 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_tx_block [2021-11-07 01:22:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:22:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:22:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 01:22:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:22:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:22:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 01:22:34,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 01:22:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:22:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:22:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_13 [2021-11-07 01:22:34,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_13 [2021-11-07 01:22:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_15 [2021-11-07 01:22:34,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_15 [2021-11-07 01:22:34,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:22:34,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:22:34,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:22:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:22:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:22:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:22:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:22:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:22:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:22:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:22:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_receive [2021-11-07 01:22:34,407 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_receive [2021-11-07 01:22:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:22:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:22:34,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:23:09,590 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:23:09,590 INFO L299 CfgBuilder]: Removed 687 assume(true) statements. [2021-11-07 01:23:09,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:23:09 BoogieIcfgContainer [2021-11-07 01:23:09,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:23:09,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:23:09,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:23:09,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:23:09,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:22:30" (1/3) ... [2021-11-07 01:23:09,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f468424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:23:09, skipping insertion in model container [2021-11-07 01:23:09,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:33" (2/3) ... [2021-11-07 01:23:09,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f468424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:23:09, skipping insertion in model container [2021-11-07 01:23:09,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:23:09" (3/3) ... [2021-11-07 01:23:09,605 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-07 01:23:09,611 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:23:09,612 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:23:09,677 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:23:09,684 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 01:23:09,684 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:23:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 1205 states, 1168 states have (on average 1.5231164383561644) internal successors, (1779), 1175 states have internal predecessors, (1779), 20 states have call successors, (20), 11 states have call predecessors, (20), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-07 01:23:09,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:23:09,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:09,742 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:09,742 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:23:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:09,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1408021568, now seen corresponding path program 1 times [2021-11-07 01:23:09,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:09,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967792391] [2021-11-07 01:23:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:09,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:09,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:09,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:09,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:23:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:14,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:23:14,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:14,556 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 01:23:14,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:14,695 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 01:23:14,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:14,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967792391] [2021-11-07 01:23:14,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967792391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:14,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:14,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:23:14,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536543547] [2021-11-07 01:23:14,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:23:14,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:14,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:23:14,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:23:14,731 INFO L87 Difference]: Start difference. First operand has 1205 states, 1168 states have (on average 1.5231164383561644) internal successors, (1779), 1175 states have internal predecessors, (1779), 20 states have call successors, (20), 11 states have call predecessors, (20), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 01:23:15,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:15,060 INFO L93 Difference]: Finished difference Result 2407 states and 3655 transitions. [2021-11-07 01:23:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:23:15,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 18 [2021-11-07 01:23:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:15,103 INFO L225 Difference]: With dead ends: 2407 [2021-11-07 01:23:15,103 INFO L226 Difference]: Without dead ends: 1192 [2021-11-07 01:23:15,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:23:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-11-07 01:23:15,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1192. [2021-11-07 01:23:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1156 states have (on average 1.5008650519031141) internal successors, (1735), 1162 states have internal predecessors, (1735), 20 states have call successors, (20), 11 states have call predecessors, (20), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-07 01:23:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1775 transitions. [2021-11-07 01:23:15,265 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1775 transitions. Word has length 18 [2021-11-07 01:23:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:15,265 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 1775 transitions. [2021-11-07 01:23:15,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 01:23:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1775 transitions. [2021-11-07 01:23:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:23:15,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:15,270 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:15,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:15,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:15,487 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:23:15,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:15,488 INFO L85 PathProgramCache]: Analyzing trace with hash -291800192, now seen corresponding path program 1 times [2021-11-07 01:23:15,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:15,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326638157] [2021-11-07 01:23:15,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:15,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:15,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:15,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:15,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:23:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:20,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1432 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:23:20,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:20,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:20,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:20,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326638157] [2021-11-07 01:23:20,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326638157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:23:20,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [836256872] [2021-11-07 01:23:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:20,657 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:20,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:23:20,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:23:20,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 01:23:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1432 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:22,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:23:22,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:23:22,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [836256872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:22,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:23:22,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:23:22,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780746995] [2021-11-07 01:23:22,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:23:22,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:22,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:23:22,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:23:22,526 INFO L87 Difference]: Start difference. First operand 1192 states and 1775 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 01:23:25,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:25,689 INFO L93 Difference]: Finished difference Result 4674 states and 6997 transitions. [2021-11-07 01:23:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:23:25,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 20 [2021-11-07 01:23:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:25,723 INFO L225 Difference]: With dead ends: 4674 [2021-11-07 01:23:25,723 INFO L226 Difference]: Without dead ends: 3495 [2021-11-07 01:23:25,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:23:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2021-11-07 01:23:25,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 3495. [2021-11-07 01:23:25,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3397 states have (on average 1.5051516043567854) internal successors, (5113), 3407 states have internal predecessors, (5113), 60 states have call successors, (60), 33 states have call predecessors, (60), 33 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-11-07 01:23:25,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5233 transitions. [2021-11-07 01:23:25,975 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5233 transitions. Word has length 20 [2021-11-07 01:23:25,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:25,977 INFO L470 AbstractCegarLoop]: Abstraction has 3495 states and 5233 transitions. [2021-11-07 01:23:25,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 01:23:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5233 transitions. [2021-11-07 01:23:25,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:23:25,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:25,986 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] [2021-11-07 01:23:26,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:26,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-07 01:23:26,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:26,388 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:23:26,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:26,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1191961126, now seen corresponding path program 1 times [2021-11-07 01:23:26,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:26,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807023170] [2021-11-07 01:23:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:26,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:26,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:26,402 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:26,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:23:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:30,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:23:30,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:30,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:31,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:31,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807023170] [2021-11-07 01:23:31,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807023170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:23:31,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2097679634] [2021-11-07 01:23:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:31,436 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:31,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:23:31,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:23:31,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:23:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:33,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:33,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:23:33,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:23:33,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2097679634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:33,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:23:33,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:23:33,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793135945] [2021-11-07 01:23:33,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:33,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:23:33,249 INFO L87 Difference]: Start difference. First operand 3495 states and 5233 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 01:23:33,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:33,619 INFO L93 Difference]: Finished difference Result 3525 states and 5261 transitions. [2021-11-07 01:23:33,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:33,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 27 [2021-11-07 01:23:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:33,647 INFO L225 Difference]: With dead ends: 3525 [2021-11-07 01:23:33,647 INFO L226 Difference]: Without dead ends: 3510 [2021-11-07 01:23:33,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:23:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2021-11-07 01:23:33,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 3495. [2021-11-07 01:23:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3397 states have (on average 1.5048572269649692) internal successors, (5112), 3407 states have internal predecessors, (5112), 60 states have call successors, (60), 33 states have call predecessors, (60), 33 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-11-07 01:23:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5232 transitions. [2021-11-07 01:23:33,853 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5232 transitions. Word has length 27 [2021-11-07 01:23:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:33,854 INFO L470 AbstractCegarLoop]: Abstraction has 3495 states and 5232 transitions. [2021-11-07 01:23:33,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 01:23:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5232 transitions. [2021-11-07 01:23:33,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:23:33,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:33,856 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] [2021-11-07 01:23:33,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:34,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:34,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:34,277 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:23:34,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:34,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1191901544, now seen corresponding path program 1 times [2021-11-07 01:23:34,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:34,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463571125] [2021-11-07 01:23:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:34,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:34,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:34,288 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:34,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:23:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:39,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:23:39,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:39,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:39,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:39,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463571125] [2021-11-07 01:23:39,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463571125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:23:39,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2093576770] [2021-11-07 01:23:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:39,819 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:39,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:23:39,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:23:39,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:23:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:23:41,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:23:42,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:23:42,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2093576770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:42,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:23:42,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 01:23:42,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239513741] [2021-11-07 01:23:42,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:23:42,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:23:42,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:23:42,630 INFO L87 Difference]: Start difference. First operand 3495 states and 5232 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 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 01:23:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:43,825 INFO L93 Difference]: Finished difference Result 10457 states and 15845 transitions. [2021-11-07 01:23:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:23:43,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 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 27 [2021-11-07 01:23:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:43,886 INFO L225 Difference]: With dead ends: 10457 [2021-11-07 01:23:43,886 INFO L226 Difference]: Without dead ends: 6975 [2021-11-07 01:23:43,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:23:43,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6975 states. [2021-11-07 01:23:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6975 to 6963. [2021-11-07 01:23:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6963 states, 6772 states have (on average 1.5020673360897814) internal successors, (10172), 6788 states have internal predecessors, (10172), 120 states have call successors, (120), 66 states have call predecessors, (120), 66 states have return successors, (180), 114 states have call predecessors, (180), 120 states have call successors, (180) [2021-11-07 01:23:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6963 states to 6963 states and 10472 transitions. [2021-11-07 01:23:44,269 INFO L78 Accepts]: Start accepts. Automaton has 6963 states and 10472 transitions. Word has length 27 [2021-11-07 01:23:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:44,270 INFO L470 AbstractCegarLoop]: Abstraction has 6963 states and 10472 transitions. [2021-11-07 01:23:44,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 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 01:23:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 6963 states and 10472 transitions. [2021-11-07 01:23:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:23:44,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:44,272 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] [2021-11-07 01:23:44,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:44,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:44,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:44,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:23:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:44,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1705760248, now seen corresponding path program 1 times [2021-11-07 01:23:44,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:44,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456331329] [2021-11-07 01:23:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:44,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:44,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:44,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:44,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:23:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:49,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:23:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:49,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:49,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:49,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456331329] [2021-11-07 01:23:49,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456331329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:23:49,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1528416344] [2021-11-07 01:23:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:49,824 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:49,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:23:49,831 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:23:49,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:23:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:51,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:23:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:23:52,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:23:52,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1528416344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:52,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:23:52,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 01:23:52,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714488046] [2021-11-07 01:23:52,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:23:52,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:52,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:23:52,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:23:52,380 INFO L87 Difference]: Start difference. First operand 6963 states and 10472 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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 01:23:56,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:56,716 INFO L93 Difference]: Finished difference Result 27740 states and 42439 transitions. [2021-11-07 01:23:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:23:56,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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 28 [2021-11-07 01:23:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:56,882 INFO L225 Difference]: With dead ends: 27740 [2021-11-07 01:23:56,882 INFO L226 Difference]: Without dead ends: 20790 [2021-11-07 01:23:56,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:23:56,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20790 states. [2021-11-07 01:23:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20790 to 20770. [2021-11-07 01:23:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20770 states, 20207 states have (on average 1.4991834512792597) internal successors, (30294), 20247 states have internal predecessors, (30294), 360 states have call successors, (360), 198 states have call predecessors, (360), 198 states have return successors, (720), 342 states have call predecessors, (720), 360 states have call successors, (720) [2021-11-07 01:23:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20770 states to 20770 states and 31374 transitions. [2021-11-07 01:23:57,897 INFO L78 Accepts]: Start accepts. Automaton has 20770 states and 31374 transitions. Word has length 28 [2021-11-07 01:23:57,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:57,898 INFO L470 AbstractCegarLoop]: Abstraction has 20770 states and 31374 transitions. [2021-11-07 01:23:57,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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 01:23:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 20770 states and 31374 transitions. [2021-11-07 01:23:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:23:57,902 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:57,903 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] [2021-11-07 01:23:57,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:58,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:58,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:58,317 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:23:58,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:58,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1338962594, now seen corresponding path program 1 times [2021-11-07 01:23:58,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:58,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205360625] [2021-11-07 01:23:58,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:58,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:58,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:58,328 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:58,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:24:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:02,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 1469 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:24:02,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:03,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:03,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:03,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205360625] [2021-11-07 01:24:03,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205360625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:03,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [336033835] [2021-11-07 01:24:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:03,540 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:03,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:24:03,545 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:24:03,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 01:24:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:05,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:05,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:24:05,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:24:05,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [336033835] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:05,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:24:05,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:24:05,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398095354] [2021-11-07 01:24:05,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:05,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:05,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:05,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:05,560 INFO L87 Difference]: Start difference. First operand 20770 states and 31374 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 01:24:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:06,238 INFO L93 Difference]: Finished difference Result 20782 states and 31386 transitions. [2021-11-07 01:24:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:06,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 29 [2021-11-07 01:24:06,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:06,312 INFO L225 Difference]: With dead ends: 20782 [2021-11-07 01:24:06,312 INFO L226 Difference]: Without dead ends: 20780 [2021-11-07 01:24:06,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:06,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20780 states. [2021-11-07 01:24:07,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20780 to 20778. [2021-11-07 01:24:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20778 states, 20215 states have (on average 1.4990353697749197) internal successors, (30303), 20255 states have internal predecessors, (30303), 360 states have call successors, (360), 198 states have call predecessors, (360), 198 states have return successors, (720), 342 states have call predecessors, (720), 360 states have call successors, (720) [2021-11-07 01:24:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20778 states to 20778 states and 31383 transitions. [2021-11-07 01:24:07,142 INFO L78 Accepts]: Start accepts. Automaton has 20778 states and 31383 transitions. Word has length 29 [2021-11-07 01:24:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:07,144 INFO L470 AbstractCegarLoop]: Abstraction has 20778 states and 31383 transitions. [2021-11-07 01:24:07,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 01:24:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 20778 states and 31383 transitions. [2021-11-07 01:24:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:24:07,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:07,149 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] [2021-11-07 01:24:07,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:07,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:07,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:07,572 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1441830078, now seen corresponding path program 1 times [2021-11-07 01:24:07,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:07,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138697767] [2021-11-07 01:24:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:07,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:07,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:07,576 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:07,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:24:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:11,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:24:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:12,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:12,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:12,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138697767] [2021-11-07 01:24:12,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138697767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:12,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [870658219] [2021-11-07 01:24:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:12,560 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:24:12,561 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:24:12,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:24:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:14,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:14,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:24:14,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:24:14,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [870658219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:14,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:24:14,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:24:14,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123841813] [2021-11-07 01:24:14,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:14,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:14,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:14,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:14,894 INFO L87 Difference]: Start difference. First operand 20778 states and 31383 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 01:24:15,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:15,287 INFO L93 Difference]: Finished difference Result 20778 states and 31383 transitions. [2021-11-07 01:24:15,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:15,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 30 [2021-11-07 01:24:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:15,460 INFO L225 Difference]: With dead ends: 20778 [2021-11-07 01:24:15,460 INFO L226 Difference]: Without dead ends: 20776 [2021-11-07 01:24:15,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:15,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20776 states. [2021-11-07 01:24:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20776 to 20776. [2021-11-07 01:24:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20776 states, 20214 states have (on average 1.4990105867220738) internal successors, (30301), 20253 states have internal predecessors, (30301), 360 states have call successors, (360), 198 states have call predecessors, (360), 198 states have return successors, (720), 342 states have call predecessors, (720), 360 states have call successors, (720) [2021-11-07 01:24:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20776 states to 20776 states and 31381 transitions. [2021-11-07 01:24:16,272 INFO L78 Accepts]: Start accepts. Automaton has 20776 states and 31381 transitions. Word has length 30 [2021-11-07 01:24:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:16,273 INFO L470 AbstractCegarLoop]: Abstraction has 20776 states and 31381 transitions. [2021-11-07 01:24:16,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 01:24:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 20776 states and 31381 transitions. [2021-11-07 01:24:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:24:16,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:16,275 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] [2021-11-07 01:24:16,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:16,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:16,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:16,696 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:16,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:16,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1747056980, now seen corresponding path program 1 times [2021-11-07 01:24:16,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:16,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893400557] [2021-11-07 01:24:16,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:16,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:16,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:16,703 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:16,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:24:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:21,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:24:21,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:21,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:21,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:21,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893400557] [2021-11-07 01:24:21,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893400557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:21,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1485176131] [2021-11-07 01:24:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:21,691 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:21,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:24:21,693 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:24:21,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 01:24:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:23,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:23,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:24:23,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:24:23,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1485176131] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:23,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:24:23,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:24:23,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075346527] [2021-11-07 01:24:23,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:23,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:23,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:23,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:23,862 INFO L87 Difference]: Start difference. First operand 20776 states and 31381 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 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 01:24:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:24,239 INFO L93 Difference]: Finished difference Result 20776 states and 31381 transitions. [2021-11-07 01:24:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:24,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 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 31 [2021-11-07 01:24:24,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:24,321 INFO L225 Difference]: With dead ends: 20776 [2021-11-07 01:24:24,321 INFO L226 Difference]: Without dead ends: 20767 [2021-11-07 01:24:24,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:24,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20767 states. [2021-11-07 01:24:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20767 to 20767. [2021-11-07 01:24:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20767 states, 20206 states have (on average 1.4990101949915866) internal successors, (30289), 20244 states have internal predecessors, (30289), 360 states have call successors, (360), 198 states have call predecessors, (360), 198 states have return successors, (720), 342 states have call predecessors, (720), 360 states have call successors, (720) [2021-11-07 01:24:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20767 states to 20767 states and 31369 transitions. [2021-11-07 01:24:25,278 INFO L78 Accepts]: Start accepts. Automaton has 20767 states and 31369 transitions. Word has length 31 [2021-11-07 01:24:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:25,280 INFO L470 AbstractCegarLoop]: Abstraction has 20767 states and 31369 transitions. [2021-11-07 01:24:25,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 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 01:24:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 20767 states and 31369 transitions. [2021-11-07 01:24:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:24:25,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:25,303 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 01:24:25,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:25,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:25,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:25,720 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:25,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1998511084, now seen corresponding path program 1 times [2021-11-07 01:24:25,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:25,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771048468] [2021-11-07 01:24:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:25,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:25,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:25,727 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:25,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:24:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:30,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1680 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:24:30,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:30,578 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 01:24:30,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:31,176 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 01:24:31,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:31,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771048468] [2021-11-07 01:24:31,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771048468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:31,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1159756723] [2021-11-07 01:24:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:31,177 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:24:31,178 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:24:31,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 01:24:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1680 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:24:33,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:24:33,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1159756723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:33,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:24:33,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:24:33,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424748257] [2021-11-07 01:24:33,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:33,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:33,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:33,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:33,756 INFO L87 Difference]: Start difference. First operand 20767 states and 31369 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 01:24:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:34,584 INFO L93 Difference]: Finished difference Result 43004 states and 65081 transitions. [2021-11-07 01:24:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:34,585 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 01:24:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:34,661 INFO L225 Difference]: With dead ends: 43004 [2021-11-07 01:24:34,661 INFO L226 Difference]: Without dead ends: 22250 [2021-11-07 01:24:34,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22250 states. [2021-11-07 01:24:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22250 to 22138. [2021-11-07 01:24:35,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22138 states, 21577 states have (on average 1.5047967743430504) internal successors, (32469), 21615 states have internal predecessors, (32469), 360 states have call successors, (360), 198 states have call predecessors, (360), 198 states have return successors, (720), 342 states have call predecessors, (720), 360 states have call successors, (720) [2021-11-07 01:24:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22138 states to 22138 states and 33549 transitions. [2021-11-07 01:24:35,858 INFO L78 Accepts]: Start accepts. Automaton has 22138 states and 33549 transitions. Word has length 80 [2021-11-07 01:24:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:35,859 INFO L470 AbstractCegarLoop]: Abstraction has 22138 states and 33549 transitions. [2021-11-07 01:24:35,859 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 01:24:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 22138 states and 33549 transitions. [2021-11-07 01:24:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:24:35,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:35,874 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] [2021-11-07 01:24:35,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:36,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:36,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:36,287 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:36,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1229485750, now seen corresponding path program 1 times [2021-11-07 01:24:36,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:36,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751905767] [2021-11-07 01:24:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:36,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:36,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:36,292 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:36,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:24:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:40,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1701 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:24:40,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:24:41,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:24:41,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:41,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751905767] [2021-11-07 01:24:41,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751905767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:41,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1658899642] [2021-11-07 01:24:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:41,947 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:41,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:24:41,953 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:24:41,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 01:24:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1701 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:43,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:24:44,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:24:44,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1658899642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:44,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:24:44,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:24:44,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732429109] [2021-11-07 01:24:44,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:44,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:44,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:44,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:44,532 INFO L87 Difference]: Start difference. First operand 22138 states and 33549 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 01:24:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:45,031 INFO L93 Difference]: Finished difference Result 44281 states and 67119 transitions. [2021-11-07 01:24:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:45,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 88 [2021-11-07 01:24:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:45,102 INFO L225 Difference]: With dead ends: 44281 [2021-11-07 01:24:45,102 INFO L226 Difference]: Without dead ends: 22156 [2021-11-07 01:24:45,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22156 states. [2021-11-07 01:24:46,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22156 to 22156. [2021-11-07 01:24:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22156 states, 21595 states have (on average 1.5043760129659642) internal successors, (32487), 21633 states have internal predecessors, (32487), 360 states have call successors, (360), 198 states have call predecessors, (360), 198 states have return successors, (720), 342 states have call predecessors, (720), 360 states have call successors, (720) [2021-11-07 01:24:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22156 states to 22156 states and 33567 transitions. [2021-11-07 01:24:46,191 INFO L78 Accepts]: Start accepts. Automaton has 22156 states and 33567 transitions. Word has length 88 [2021-11-07 01:24:46,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:46,191 INFO L470 AbstractCegarLoop]: Abstraction has 22156 states and 33567 transitions. [2021-11-07 01:24:46,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 01:24:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 22156 states and 33567 transitions. [2021-11-07 01:24:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:24:46,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:46,206 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] [2021-11-07 01:24:46,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:46,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-07 01:24:46,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:46,620 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:46,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1623852536, now seen corresponding path program 1 times [2021-11-07 01:24:46,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:46,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158104505] [2021-11-07 01:24:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:46,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:46,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:46,624 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:46,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:24:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:51,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:24:51,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:24:51,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:24:52,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:52,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158104505] [2021-11-07 01:24:52,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158104505] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:52,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1962296578] [2021-11-07 01:24:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:52,469 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:52,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:24:52,470 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:24:52,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:24:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:54,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:54,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:24:55,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:24:55,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1962296578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:55,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:24:55,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:24:55,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336882584] [2021-11-07 01:24:55,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:24:55,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:55,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:24:55,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:24:55,735 INFO L87 Difference]: Start difference. First operand 22156 states and 33567 transitions. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 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 01:25:03,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:03,681 INFO L93 Difference]: Finished difference Result 99406 states and 150675 transitions. [2021-11-07 01:25:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:25:03,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 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 88 [2021-11-07 01:25:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:03,931 INFO L225 Difference]: With dead ends: 99406 [2021-11-07 01:25:03,931 INFO L226 Difference]: Without dead ends: 77263 [2021-11-07 01:25:03,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:25:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77263 states. [2021-11-07 01:25:05,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77263 to 22192. [2021-11-07 01:25:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22192 states, 21631 states have (on average 1.5035365910036522) internal successors, (32523), 21669 states have internal predecessors, (32523), 360 states have call successors, (360), 198 states have call predecessors, (360), 198 states have return successors, (720), 342 states have call predecessors, (720), 360 states have call successors, (720) [2021-11-07 01:25:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22192 states to 22192 states and 33603 transitions. [2021-11-07 01:25:05,536 INFO L78 Accepts]: Start accepts. Automaton has 22192 states and 33603 transitions. Word has length 88 [2021-11-07 01:25:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:05,537 INFO L470 AbstractCegarLoop]: Abstraction has 22192 states and 33603 transitions. [2021-11-07 01:25:05,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 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 01:25:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 22192 states and 33603 transitions. [2021-11-07 01:25:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:25:05,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:05,551 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] [2021-11-07 01:25:05,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:05,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-07 01:25:05,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:05,968 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:25:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:05,968 INFO L85 PathProgramCache]: Analyzing trace with hash -922787958, now seen corresponding path program 1 times [2021-11-07 01:25:05,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:05,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179139362] [2021-11-07 01:25:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:05,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:05,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:05,973 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:05,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:25:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:10,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1701 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:25:10,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:25:11,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:25:12,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:12,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179139362] [2021-11-07 01:25:12,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179139362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:12,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [688943699] [2021-11-07 01:25:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:12,196 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:12,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:25:12,197 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:25:12,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:25:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:14,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1701 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:25:14,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:25:15,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:25:15,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [688943699] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:15,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:25:15,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5, 5] total 13 [2021-11-07 01:25:15,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834489248] [2021-11-07 01:25:15,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:25:15,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:15,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:25:15,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:25:15,620 INFO L87 Difference]: Start difference. First operand 22192 states and 33603 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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 01:25:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:17,724 INFO L93 Difference]: Finished difference Result 55786 states and 84579 transitions. [2021-11-07 01:25:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:25:17,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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 88 [2021-11-07 01:25:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:17,789 INFO L225 Difference]: With dead ends: 55786 [2021-11-07 01:25:17,789 INFO L226 Difference]: Without dead ends: 33499 [2021-11-07 01:25:17,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:25:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33499 states. [2021-11-07 01:25:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33499 to 22192. [2021-11-07 01:25:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22192 states, 21631 states have (on average 1.5010401738246035) internal successors, (32469), 21669 states have internal predecessors, (32469), 360 states have call successors, (360), 198 states have call predecessors, (360), 198 states have return successors, (720), 342 states have call predecessors, (720), 360 states have call successors, (720) [2021-11-07 01:25:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22192 states to 22192 states and 33549 transitions. [2021-11-07 01:25:19,114 INFO L78 Accepts]: Start accepts. Automaton has 22192 states and 33549 transitions. Word has length 88 [2021-11-07 01:25:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:19,115 INFO L470 AbstractCegarLoop]: Abstraction has 22192 states and 33549 transitions. [2021-11-07 01:25:19,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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 01:25:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 22192 states and 33549 transitions. [2021-11-07 01:25:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:25:19,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:19,127 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] [2021-11-07 01:25:19,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:19,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-07 01:25:19,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:19,542 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:25:19,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:19,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1754139974, now seen corresponding path program 1 times [2021-11-07 01:25:19,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:19,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645897592] [2021-11-07 01:25:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:19,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:19,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:19,547 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:19,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:25:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:25:24,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:25:24,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:25:25,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:25,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645897592] [2021-11-07 01:25:25,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645897592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:25,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2126045505] [2021-11-07 01:25:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:25,564 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:25,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:25:25,565 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:25:25,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:25:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:27,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:25:27,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:25:28,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:25:29,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2126045505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:29,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:25:29,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-07 01:25:29,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439266449] [2021-11-07 01:25:29,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:25:29,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:29,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:25:29,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:25:29,483 INFO L87 Difference]: Start difference. First operand 22192 states and 33549 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 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 01:25:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:36,808 INFO L93 Difference]: Finished difference Result 92161 states and 140073 transitions. [2021-11-07 01:25:36,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:25:36,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 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 90 [2021-11-07 01:25:36,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:36,976 INFO L225 Difference]: With dead ends: 92161 [2021-11-07 01:25:36,976 INFO L226 Difference]: Without dead ends: 69982 [2021-11-07 01:25:37,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:25:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69982 states. [2021-11-07 01:25:38,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69982 to 22282. [2021-11-07 01:25:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22282 states, 21721 states have (on average 1.4989641360894987) internal successors, (32559), 21759 states have internal predecessors, (32559), 360 states have call successors, (360), 198 states have call predecessors, (360), 198 states have return successors, (720), 342 states have call predecessors, (720), 360 states have call successors, (720) [2021-11-07 01:25:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22282 states to 22282 states and 33639 transitions. [2021-11-07 01:25:38,667 INFO L78 Accepts]: Start accepts. Automaton has 22282 states and 33639 transitions. Word has length 90 [2021-11-07 01:25:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:38,668 INFO L470 AbstractCegarLoop]: Abstraction has 22282 states and 33639 transitions. [2021-11-07 01:25:38,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 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 01:25:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 22282 states and 33639 transitions. [2021-11-07 01:25:38,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:25:38,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:38,675 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] [2021-11-07 01:25:38,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:38,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:39,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:39,080 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:25:39,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:39,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2068705218, now seen corresponding path program 1 times [2021-11-07 01:25:39,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:39,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663500352] [2021-11-07 01:25:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:39,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:39,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:39,084 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:39,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:25:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:44,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:25:44,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:25:44,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:25:45,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:45,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663500352] [2021-11-07 01:25:45,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663500352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:45,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [672337582] [2021-11-07 01:25:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:45,149 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:45,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:25:45,150 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:25:45,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:25:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:47,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:25:47,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:25:48,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:25:48,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [672337582] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:48,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:25:48,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:25:48,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774788341] [2021-11-07 01:25:48,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:48,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:48,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:48,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:25:48,515 INFO L87 Difference]: Start difference. First operand 22282 states and 33639 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 01:25:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:50,618 INFO L93 Difference]: Finished difference Result 45777 states and 69090 transitions. [2021-11-07 01:25:50,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:50,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 92 [2021-11-07 01:25:50,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:50,696 INFO L225 Difference]: With dead ends: 45777 [2021-11-07 01:25:50,696 INFO L226 Difference]: Without dead ends: 23508 [2021-11-07 01:25:50,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:25:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23508 states. [2021-11-07 01:25:52,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23508 to 22282. [2021-11-07 01:25:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22282 states, 21721 states have (on average 1.4981354449610975) internal successors, (32541), 21759 states have internal predecessors, (32541), 360 states have call successors, (360), 198 states have call predecessors, (360), 198 states have return successors, (720), 342 states have call predecessors, (720), 360 states have call successors, (720) [2021-11-07 01:25:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22282 states to 22282 states and 33621 transitions. [2021-11-07 01:25:52,438 INFO L78 Accepts]: Start accepts. Automaton has 22282 states and 33621 transitions. Word has length 92 [2021-11-07 01:25:52,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:52,439 INFO L470 AbstractCegarLoop]: Abstraction has 22282 states and 33621 transitions. [2021-11-07 01:25:52,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 01:25:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 22282 states and 33621 transitions. [2021-11-07 01:25:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:25:52,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:52,447 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] [2021-11-07 01:25:52,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:52,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-07 01:25:52,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:52,848 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:25:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:52,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1567326790, now seen corresponding path program 1 times [2021-11-07 01:25:52,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:52,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682781318] [2021-11-07 01:25:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:52,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:52,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:52,852 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:52,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:25:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:57,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:25:57,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:25:58,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:25:59,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:59,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682781318] [2021-11-07 01:25:59,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682781318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:59,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815810] [2021-11-07 01:25:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:59,008 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:59,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:25:59,009 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:25:59,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:26:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:01,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:26:01,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:02,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:02,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1815810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:02,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:26:02,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 01:26:02,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594218831] [2021-11-07 01:26:02,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:26:02,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:26:02,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:26:02,406 INFO L87 Difference]: Start difference. First operand 22282 states and 33621 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 01:26:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:08,321 INFO L93 Difference]: Finished difference Result 94360 states and 142863 transitions. [2021-11-07 01:26:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:26:08,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 93 [2021-11-07 01:26:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:08,461 INFO L225 Difference]: With dead ends: 94360 [2021-11-07 01:26:08,462 INFO L226 Difference]: Without dead ends: 72091 [2021-11-07 01:26:08,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:26:08,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72091 states. [2021-11-07 01:26:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72091 to 22426. [2021-11-07 01:26:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22426 states, 21865 states have (on average 1.4965012577178138) internal successors, (32721), 21903 states have internal predecessors, (32721), 360 states have call successors, (360), 198 states have call predecessors, (360), 198 states have return successors, (720), 342 states have call predecessors, (720), 360 states have call successors, (720) [2021-11-07 01:26:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22426 states to 22426 states and 33801 transitions. [2021-11-07 01:26:10,469 INFO L78 Accepts]: Start accepts. Automaton has 22426 states and 33801 transitions. Word has length 93 [2021-11-07 01:26:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:10,470 INFO L470 AbstractCegarLoop]: Abstraction has 22426 states and 33801 transitions. [2021-11-07 01:26:10,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 01:26:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 22426 states and 33801 transitions. [2021-11-07 01:26:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 01:26:10,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:10,478 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] [2021-11-07 01:26:10,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:10,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:10,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:10,881 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:26:10,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:10,881 INFO L85 PathProgramCache]: Analyzing trace with hash -373223678, now seen corresponding path program 1 times [2021-11-07 01:26:10,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:10,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940591572] [2021-11-07 01:26:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:10,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:10,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:10,896 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:10,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:26:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:16,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:16,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:26:16,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:26:17,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:17,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940591572] [2021-11-07 01:26:17,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940591572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:17,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1937986433] [2021-11-07 01:26:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:17,521 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:17,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:17,522 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:17,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:26:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:22,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:22,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:26:22,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:26:23,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1937986433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:23,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800461907] [2021-11-07 01:26:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:23,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:26:23,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:26:23,135 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:26:23,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b93c9-6bbd-46ef-8b47-9dd774b37d71/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 01:26:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:25,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:26:25,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:26,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:27,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800461907] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:27,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:26:27,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5, 5, 5] total 22 [2021-11-07 01:26:27,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77977294] [2021-11-07 01:26:27,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:26:27,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:27,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:26:27,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:26:27,700 INFO L87 Difference]: Start difference. First operand 22426 states and 33801 transitions. Second operand has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 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 01:27:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:01,850 INFO L93 Difference]: Finished difference Result 169575 states and 257739 transitions. [2021-11-07 01:27:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-07 01:27:01,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 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 95 [2021-11-07 01:27:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:02,435 INFO L225 Difference]: With dead ends: 169575 [2021-11-07 01:27:02,436 INFO L226 Difference]: Without dead ends: 147162 [2021-11-07 01:27:02,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=996, Invalid=4554, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 01:27:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147162 states.