./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/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_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/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_e0d28375-fe0e-481a-9f46-9db054d0477e/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 03d55f274509719e259063891bf7f51d6ae3645569d8243a0d7434c1b24ad753 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:42,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:42,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:42,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:42,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:42,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:42,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:42,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:42,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:42,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:42,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:42,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:42,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:42,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:42,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:42,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:42,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:42,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:42,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:42,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:42,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:42,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:42,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:42,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:42,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:42,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:42,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:42,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:42,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:42,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:42,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:42,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:42,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:42,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:42,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:42,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:42,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:42,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:42,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:42,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:42,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:42,447 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:25:42,469 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:42,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:42,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:42,470 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:42,471 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:42,471 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:42,471 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:25:42,471 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:42,471 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:42,471 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:25:42,472 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:25:42,472 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:42,472 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:25:42,472 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:25:42,472 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:25:42,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:42,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:25:42,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:42,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:42,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:42,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:42,474 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:42,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:42,475 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:42,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:42,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:42,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:42,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:42,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:42,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:42,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:42,476 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:25:42,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:25:42,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:42,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:42,477 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:42,477 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_e0d28375-fe0e-481a-9f46-9db054d0477e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d55f274509719e259063891bf7f51d6ae3645569d8243a0d7434c1b24ad753 [2021-11-07 01:25:42,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:42,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:42,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:42,737 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:42,738 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:42,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-07 01:25:42,819 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/data/ad52baa91/6baf5010d5d342c0b41967f3f39af2a8/FLAG73fac69e1 [2021-11-07 01:25:43,678 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:43,679 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-07 01:25:43,730 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/data/ad52baa91/6baf5010d5d342c0b41967f3f39af2a8/FLAG73fac69e1 [2021-11-07 01:25:44,179 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/data/ad52baa91/6baf5010d5d342c0b41967f3f39af2a8 [2021-11-07 01:25:44,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:44,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:44,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:44,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:44,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:44,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:44" (1/1) ... [2021-11-07 01:25:44,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1956a673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:44, skipping insertion in model container [2021-11-07 01:25:44,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:44" (1/1) ... [2021-11-07 01:25:44,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:44,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:45,285 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[206925,206938] [2021-11-07 01:25:45,572 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 01:25:45,577 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 01:25:45,605 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:25:45,606 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:25:45,625 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 01:25:45,654 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 01:25:45,698 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 01:25:45,715 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 01:25:45,737 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 01:25:45,753 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 01:25:45,770 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 01:25:45,784 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 01:25:45,793 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 01:25:45,801 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:25:45,825 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 01:25:45,832 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:25:45,841 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 01:25:45,861 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 01:25:45,868 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 01:25:45,912 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 01:25:45,913 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 01:25:45,913 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 01:25:45,920 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 01:25:45,922 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 01:25:45,924 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 01:25:45,990 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 01:25:46,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:46,063 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 01:25:46,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29e358d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:46, skipping insertion in model container [2021-11-07 01:25:46,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:46,065 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:25:46,068 INFO L168 Benchmark]: Toolchain (without parser) took 1875.81 ms. Allocated memory was 127.9 MB in the beginning and 167.8 MB in the end (delta: 39.8 MB). Free memory was 80.3 MB in the beginning and 100.6 MB in the end (delta: -20.4 MB). Peak memory consumption was 35.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:46,068 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 127.9 MB. Free memory was 98.5 MB in the beginning and 98.5 MB in the end (delta: 31.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:25:46,070 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1869.24 ms. Allocated memory was 127.9 MB in the beginning and 167.8 MB in the end (delta: 39.8 MB). Free memory was 80.1 MB in the beginning and 100.6 MB in the end (delta: -20.6 MB). Peak memory consumption was 33.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:46,072 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 127.9 MB. Free memory was 98.5 MB in the beginning and 98.5 MB in the end (delta: 31.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1869.24 ms. Allocated memory was 127.9 MB in the beginning and 167.8 MB in the end (delta: 39.8 MB). Free memory was 80.1 MB in the beginning and 100.6 MB in the end (delta: -20.6 MB). Peak memory consumption was 33.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7470]: 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_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/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_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/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_e0d28375-fe0e-481a-9f46-9db054d0477e/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 03d55f274509719e259063891bf7f51d6ae3645569d8243a0d7434c1b24ad753 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:48,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:48,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:48,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:48,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:48,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:48,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:48,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:48,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:48,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:48,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:48,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:48,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:48,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:48,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:48,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:48,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:48,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:48,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:48,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:48,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:48,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:48,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:48,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:48,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:48,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:48,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:48,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:48,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:48,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:48,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:48,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:48,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:48,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:48,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:48,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:48,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:48,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:48,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:48,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:48,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:48,539 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:25:48,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:48,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:48,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:48,586 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:48,587 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:48,587 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:48,587 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:48,587 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:48,588 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:48,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:48,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:48,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:48,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:48,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:48,592 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:48,592 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:25:48,592 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:25:48,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:48,593 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:48,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:48,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:48,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:25:48,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:48,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:48,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:48,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:48,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:48,595 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:25:48,596 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:48,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:48,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:48,596 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:48,597 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_e0d28375-fe0e-481a-9f46-9db054d0477e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d55f274509719e259063891bf7f51d6ae3645569d8243a0d7434c1b24ad753 [2021-11-07 01:25:49,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:49,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:49,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:49,050 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:49,050 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:49,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-07 01:25:49,124 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/data/09d4455e3/6cb06f33acae45d192b51c1b9ff5f659/FLAGedfbaeb4d [2021-11-07 01:25:50,209 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:50,210 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-07 01:25:50,263 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/data/09d4455e3/6cb06f33acae45d192b51c1b9ff5f659/FLAGedfbaeb4d [2021-11-07 01:25:50,615 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/data/09d4455e3/6cb06f33acae45d192b51c1b9ff5f659 [2021-11-07 01:25:50,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:50,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:50,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:50,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:50,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:50,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:50" (1/1) ... [2021-11-07 01:25:50,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7260901a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:50, skipping insertion in model container [2021-11-07 01:25:50,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:50" (1/1) ... [2021-11-07 01:25:50,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:50,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:51,774 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_e0d28375-fe0e-481a-9f46-9db054d0477e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[206925,206938] [2021-11-07 01:25:52,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:52,636 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:25:52,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:52,910 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_e0d28375-fe0e-481a-9f46-9db054d0477e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[206925,206938] [2021-11-07 01:25:53,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:53,160 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:25:53,494 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_e0d28375-fe0e-481a-9f46-9db054d0477e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[206925,206938] [2021-11-07 01:25:53,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:53,750 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:25:53,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53 WrapperNode [2021-11-07 01:25:53,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:53,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:53,752 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:25:53,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:25:53,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:53,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:54,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:54,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:25:54,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:25:54,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:25:54,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:54,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:54,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:54,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:54,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:54,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:54,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:54,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:25:54,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:25:54,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:25:54,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:25:54,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (1/1) ... [2021-11-07 01:25:54,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:54,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:54,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:25:54,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:25:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:25:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:25:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:25:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:25:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:25:54,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:25:54,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:25:54,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:25:54,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:25:54,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:25:54,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:25:54,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:25:54,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:25:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:25:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:25:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:25:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:25:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:25:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:25:54,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:25:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:25:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:25:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:25:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:25:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:25:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:25:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:25:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:25:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2021-11-07 01:25:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:25:54,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:26:54,925 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:26:54,932 INFO L299 CfgBuilder]: Removed 861 assume(true) statements. [2021-11-07 01:26:54,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:54 BoogieIcfgContainer [2021-11-07 01:26:54,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:26:54,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:26:54,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:26:54,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:26:54,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:25:50" (1/3) ... [2021-11-07 01:26:54,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517b313a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:26:54, skipping insertion in model container [2021-11-07 01:26:54,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:53" (2/3) ... [2021-11-07 01:26:54,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517b313a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:26:54, skipping insertion in model container [2021-11-07 01:26:54,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:54" (3/3) ... [2021-11-07 01:26:54,944 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-07 01:26:54,950 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:26:54,950 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:26:55,035 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:26:55,041 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 01:26:55,042 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:26:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 937 states, 935 states have (on average 1.4609625668449198) internal successors, (1366), 936 states have internal predecessors, (1366), 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 01:26:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:26:55,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:55,105 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:55,107 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash -353898557, now seen corresponding path program 1 times [2021-11-07 01:26:55,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:55,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237924145] [2021-11-07 01:26:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:55,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:55,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:55,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:55,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:26:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:57,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:26:57,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:58,115 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 01:26:58,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:58,331 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 01:26:58,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:58,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237924145] [2021-11-07 01:26:58,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237924145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:58,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:58,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:26:58,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324168382] [2021-11-07 01:26:58,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:58,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:58,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:58,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:26:58,357 INFO L87 Difference]: Start difference. First operand has 937 states, 935 states have (on average 1.4609625668449198) internal successors, (1366), 936 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 01:26:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:58,626 INFO L93 Difference]: Finished difference Result 1872 states and 2731 transitions. [2021-11-07 01:26:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:58,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 26 [2021-11-07 01:26:58,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:58,652 INFO L225 Difference]: With dead ends: 1872 [2021-11-07 01:26:58,655 INFO L226 Difference]: Without dead ends: 932 [2021-11-07 01:26:58,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 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 01:26:58,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-11-07 01:26:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 932. [2021-11-07 01:26:58,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 1.3920515574650913) internal successors, (1296), 931 states have internal predecessors, (1296), 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 01:26:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1296 transitions. [2021-11-07 01:26:58,785 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1296 transitions. Word has length 26 [2021-11-07 01:26:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:58,786 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 1296 transitions. [2021-11-07 01:26:58,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 01:26:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1296 transitions. [2021-11-07 01:26:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:26:58,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:58,795 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 01:26:58,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:59,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:59,019 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:59,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:59,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1526166371, now seen corresponding path program 1 times [2021-11-07 01:26:59,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:59,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575964184] [2021-11-07 01:26:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:59,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:59,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:59,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:59,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:27:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:01,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:02,073 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 01:27:02,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:02,598 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 01:27:02,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:02,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575964184] [2021-11-07 01:27:02,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575964184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:02,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1408925263] [2021-11-07 01:27:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:02,600 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:02,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:02,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:02,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 01:27:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:03,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:03,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:04,102 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 01:27:04,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:04,343 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 01:27:04,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1408925263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:04,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:04,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:27:04,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061851202] [2021-11-07 01:27:04,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:04,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:04,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:27:04,346 INFO L87 Difference]: Start difference. First operand 932 states and 1296 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 01:27:07,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:07,160 INFO L93 Difference]: Finished difference Result 3583 states and 5012 transitions. [2021-11-07 01:27:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:07,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 01:27:07,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:07,178 INFO L225 Difference]: With dead ends: 3583 [2021-11-07 01:27:07,179 INFO L226 Difference]: Without dead ends: 2673 [2021-11-07 01:27:07,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:27:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2021-11-07 01:27:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2673. [2021-11-07 01:27:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2673 states, 2672 states have (on average 1.3989520958083832) internal successors, (3738), 2672 states have internal predecessors, (3738), 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 01:27:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2673 states to 2673 states and 3738 transitions. [2021-11-07 01:27:07,313 INFO L78 Accepts]: Start accepts. Automaton has 2673 states and 3738 transitions. Word has length 28 [2021-11-07 01:27:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:07,313 INFO L470 AbstractCegarLoop]: Abstraction has 2673 states and 3738 transitions. [2021-11-07 01:27:07,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 01:27:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2673 states and 3738 transitions. [2021-11-07 01:27:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:27:07,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:07,316 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:07,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:07,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:07,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:07,725 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:07,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2110981252, now seen corresponding path program 1 times [2021-11-07 01:27:07,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:07,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960863725] [2021-11-07 01:27:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:07,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:07,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:07,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:07,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:27:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:10,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:10,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:10,869 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 01:27:10,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:11,499 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 01:27:11,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:11,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960863725] [2021-11-07 01:27:11,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960863725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:11,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [284087355] [2021-11-07 01:27:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:11,500 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:11,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:11,505 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:11,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:27:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:12,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:12,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:13,555 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 01:27:13,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:14,112 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 01:27:14,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [284087355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:14,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:14,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-07 01:27:14,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140207474] [2021-11-07 01:27:14,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:27:14,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:27:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:27:14,115 INFO L87 Difference]: Start difference. First operand 2673 states and 3738 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 01:27:16,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:16,519 INFO L93 Difference]: Finished difference Result 7973 states and 11161 transitions. [2021-11-07 01:27:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:27:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 39 [2021-11-07 01:27:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:16,554 INFO L225 Difference]: With dead ends: 7973 [2021-11-07 01:27:16,554 INFO L226 Difference]: Without dead ends: 5314 [2021-11-07 01:27:16,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:27:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2021-11-07 01:27:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 5314. [2021-11-07 01:27:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5314 states, 5313 states have (on average 1.3918690005646528) internal successors, (7395), 5313 states have internal predecessors, (7395), 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 01:27:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5314 states to 5314 states and 7395 transitions. [2021-11-07 01:27:16,851 INFO L78 Accepts]: Start accepts. Automaton has 5314 states and 7395 transitions. Word has length 39 [2021-11-07 01:27:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:16,852 INFO L470 AbstractCegarLoop]: Abstraction has 5314 states and 7395 transitions. [2021-11-07 01:27:16,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 01:27:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 5314 states and 7395 transitions. [2021-11-07 01:27:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:27:16,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:16,863 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:16,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:17,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:17,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:17,287 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash -280099486, now seen corresponding path program 1 times [2021-11-07 01:27:17,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:17,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280466402] [2021-11-07 01:27:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:17,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:17,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:17,292 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:17,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:27:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:20,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:20,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:27:20,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:27:21,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:21,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280466402] [2021-11-07 01:27:21,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280466402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:21,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [667731166] [2021-11-07 01:27:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:21,746 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:21,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:21,748 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:21,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:27:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:23,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:23,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:27:23,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:27:24,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [667731166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:24,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:24,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:27:24,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743906794] [2021-11-07 01:27:24,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:24,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:24,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:24,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:27:24,122 INFO L87 Difference]: Start difference. First operand 5314 states and 7395 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 01:27:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:25,443 INFO L93 Difference]: Finished difference Result 13932 states and 19349 transitions. [2021-11-07 01:27:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:25,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 67 [2021-11-07 01:27:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:25,496 INFO L225 Difference]: With dead ends: 13932 [2021-11-07 01:27:25,496 INFO L226 Difference]: Without dead ends: 8640 [2021-11-07 01:27:25,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:27:25,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8640 states. [2021-11-07 01:27:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8640 to 8630. [2021-11-07 01:27:25,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8630 states, 8629 states have (on average 1.3864874261212192) internal successors, (11964), 8629 states have internal predecessors, (11964), 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 01:27:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8630 states to 8630 states and 11964 transitions. [2021-11-07 01:27:25,844 INFO L78 Accepts]: Start accepts. Automaton has 8630 states and 11964 transitions. Word has length 67 [2021-11-07 01:27:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:25,845 INFO L470 AbstractCegarLoop]: Abstraction has 8630 states and 11964 transitions. [2021-11-07 01:27:25,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 01:27:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 8630 states and 11964 transitions. [2021-11-07 01:27:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:27:25,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:25,857 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] [2021-11-07 01:27:25,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:26,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:26,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:26,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:26,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1651303517, now seen corresponding path program 1 times [2021-11-07 01:27:26,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:26,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851907731] [2021-11-07 01:27:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:26,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:26,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:26,285 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:26,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:27:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:29,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:29,848 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 01:27:29,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:30,710 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 01:27:30,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:30,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851907731] [2021-11-07 01:27:30,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851907731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:30,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [319250791] [2021-11-07 01:27:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:30,711 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:30,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:30,712 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:30,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:27:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:32,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:32,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:32,690 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 01:27:32,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:33,166 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 01:27:33,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [319250791] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:33,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:33,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:27:33,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312285977] [2021-11-07 01:27:33,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:33,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:27:33,169 INFO L87 Difference]: Start difference. First operand 8630 states and 11964 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 01:27:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:33,795 INFO L93 Difference]: Finished difference Result 19395 states and 26972 transitions. [2021-11-07 01:27:33,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:33,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 75 [2021-11-07 01:27:33,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:33,862 INFO L225 Difference]: With dead ends: 19395 [2021-11-07 01:27:33,863 INFO L226 Difference]: Without dead ends: 10787 [2021-11-07 01:27:33,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:27:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10787 states. [2021-11-07 01:27:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10787 to 10735. [2021-11-07 01:27:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10735 states, 10734 states have (on average 1.3936090926029439) internal successors, (14959), 10734 states have internal predecessors, (14959), 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 01:27:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10735 states to 10735 states and 14959 transitions. [2021-11-07 01:27:34,263 INFO L78 Accepts]: Start accepts. Automaton has 10735 states and 14959 transitions. Word has length 75 [2021-11-07 01:27:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:34,264 INFO L470 AbstractCegarLoop]: Abstraction has 10735 states and 14959 transitions. [2021-11-07 01:27:34,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 01:27:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 10735 states and 14959 transitions. [2021-11-07 01:27:34,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:27:34,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:34,280 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:34,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:34,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:34,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:34,693 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:34,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1148984473, now seen corresponding path program 1 times [2021-11-07 01:27:34,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:34,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199371744] [2021-11-07 01:27:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:34,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:34,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:34,698 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:34,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:27:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:37,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:27:38,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:27:39,171 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:39,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199371744] [2021-11-07 01:27:39,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199371744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:39,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1559616558] [2021-11-07 01:27:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:39,172 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:39,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:39,175 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:39,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 01:27:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:40,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:40,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:27:41,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:27:41,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1559616558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:41,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:41,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:27:41,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705769885] [2021-11-07 01:27:41,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:27:41,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:41,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:27:41,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:27:41,838 INFO L87 Difference]: Start difference. First operand 10735 states and 14959 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 01:27:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:45,181 INFO L93 Difference]: Finished difference Result 17953 states and 25018 transitions. [2021-11-07 01:27:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:27:45,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 82 [2021-11-07 01:27:45,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:45,215 INFO L225 Difference]: With dead ends: 17953 [2021-11-07 01:27:45,215 INFO L226 Difference]: Without dead ends: 7230 [2021-11-07 01:27:45,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:27:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7230 states. [2021-11-07 01:27:45,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7230 to 7176. [2021-11-07 01:27:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 1.3941463414634145) internal successors, (10003), 7175 states have internal predecessors, (10003), 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 01:27:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 10003 transitions. [2021-11-07 01:27:45,460 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 10003 transitions. Word has length 82 [2021-11-07 01:27:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:45,462 INFO L470 AbstractCegarLoop]: Abstraction has 7176 states and 10003 transitions. [2021-11-07 01:27:45,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 01:27:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 10003 transitions. [2021-11-07 01:27:45,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:27:45,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:45,475 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:45,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:45,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:45,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:45,890 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:45,890 INFO L85 PathProgramCache]: Analyzing trace with hash 161696930, now seen corresponding path program 1 times [2021-11-07 01:27:45,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:45,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139701261] [2021-11-07 01:27:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:45,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:45,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:45,893 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:45,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:27:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:48,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:48,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:27:49,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:27:50,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:50,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139701261] [2021-11-07 01:27:50,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139701261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:50,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [306899881] [2021-11-07 01:27:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:50,515 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:50,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:50,516 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:50,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:27:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:53,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:53,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:27:54,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:27:54,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [306899881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:54,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880653229] [2021-11-07 01:27:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:54,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:27:54,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:54,992 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:27:54,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 01:27:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:56,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:27:56,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:27:57,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:27:57,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880653229] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:57,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:27:57,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-07 01:27:57,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543671984] [2021-11-07 01:27:57,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:57,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:57,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:57,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:27:57,439 INFO L87 Difference]: Start difference. First operand 7176 states and 10003 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 01:27:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:59,427 INFO L93 Difference]: Finished difference Result 31003 states and 43384 transitions. [2021-11-07 01:27:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:27:59,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:27:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:59,490 INFO L225 Difference]: With dead ends: 31003 [2021-11-07 01:27:59,491 INFO L226 Difference]: Without dead ends: 23864 [2021-11-07 01:27:59,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:27:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23864 states. [2021-11-07 01:28:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23864 to 7400. [2021-11-07 01:28:00,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7400 states, 7399 states have (on average 1.3822138126773889) internal successors, (10227), 7399 states have internal predecessors, (10227), 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 01:28:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7400 states to 7400 states and 10227 transitions. [2021-11-07 01:28:00,044 INFO L78 Accepts]: Start accepts. Automaton has 7400 states and 10227 transitions. Word has length 84 [2021-11-07 01:28:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:00,045 INFO L470 AbstractCegarLoop]: Abstraction has 7400 states and 10227 transitions. [2021-11-07 01:28:00,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 01:28:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 7400 states and 10227 transitions. [2021-11-07 01:28:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:28:00,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:00,064 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:00,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:00,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:00,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-07 01:28:00,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:28:00,684 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:00,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:00,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1368130627, now seen corresponding path program 1 times [2021-11-07 01:28:00,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:00,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906246208] [2021-11-07 01:28:00,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:00,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:00,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:00,688 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:00,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:28:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:03,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:03,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:28:04,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:28:05,396 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:05,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906246208] [2021-11-07 01:28:05,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906246208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:05,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1047574735] [2021-11-07 01:28:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:05,397 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:05,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:28:05,397 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:28:05,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:28:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:08,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:08,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:28:09,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:28:09,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1047574735] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:09,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102067769] [2021-11-07 01:28:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:09,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:28:09,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:28:09,864 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:28:09,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 01:28:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:11,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:28:11,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:28:12,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:28:12,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102067769] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:12,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:28:12,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-07 01:28:12,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773455009] [2021-11-07 01:28:12,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:28:12,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:12,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:28:12,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:28:12,688 INFO L87 Difference]: Start difference. First operand 7400 states and 10227 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 01:28:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:14,225 INFO L93 Difference]: Finished difference Result 18542 states and 25772 transitions. [2021-11-07 01:28:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:28:14,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 87 [2021-11-07 01:28:14,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:14,255 INFO L225 Difference]: With dead ends: 18542 [2021-11-07 01:28:14,256 INFO L226 Difference]: Without dead ends: 11179 [2021-11-07 01:28:14,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:28:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2021-11-07 01:28:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 7400. [2021-11-07 01:28:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7400 states, 7399 states have (on average 1.381943505879173) internal successors, (10225), 7399 states have internal predecessors, (10225), 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 01:28:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7400 states to 7400 states and 10225 transitions. [2021-11-07 01:28:14,655 INFO L78 Accepts]: Start accepts. Automaton has 7400 states and 10225 transitions. Word has length 87 [2021-11-07 01:28:14,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:14,655 INFO L470 AbstractCegarLoop]: Abstraction has 7400 states and 10225 transitions. [2021-11-07 01:28:14,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 01:28:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 7400 states and 10225 transitions. [2021-11-07 01:28:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:28:14,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:14,670 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:14,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:14,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:15,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:15,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:28:15,283 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:15,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2100098053, now seen corresponding path program 1 times [2021-11-07 01:28:15,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:15,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224404652] [2021-11-07 01:28:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:15,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:15,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:15,287 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:15,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:28:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:18,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:18,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:28:19,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:28:20,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:20,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224404652] [2021-11-07 01:28:20,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224404652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:20,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1114173061] [2021-11-07 01:28:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:20,149 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:20,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:28:20,150 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:28:20,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 01:28:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:23,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:23,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:28:24,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:28:24,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1114173061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:24,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094629463] [2021-11-07 01:28:24,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:24,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:28:24,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:28:24,703 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:28:24,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 01:28:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:26,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:28:26,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:28:27,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:28:27,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094629463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:27,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:28:27,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-07 01:28:27,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270277420] [2021-11-07 01:28:27,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:28:27,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:27,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:28:27,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:28:27,592 INFO L87 Difference]: Start difference. First operand 7400 states and 10225 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 01:28:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:28,972 INFO L93 Difference]: Finished difference Result 18548 states and 25773 transitions. [2021-11-07 01:28:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:28:28,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 87 [2021-11-07 01:28:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:29,070 INFO L225 Difference]: With dead ends: 18548 [2021-11-07 01:28:29,071 INFO L226 Difference]: Without dead ends: 11185 [2021-11-07 01:28:29,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:28:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11185 states. [2021-11-07 01:28:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11185 to 7400. [2021-11-07 01:28:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7400 states, 7399 states have (on average 1.381673199080957) internal successors, (10223), 7399 states have internal predecessors, (10223), 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 01:28:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7400 states to 7400 states and 10223 transitions. [2021-11-07 01:28:29,522 INFO L78 Accepts]: Start accepts. Automaton has 7400 states and 10223 transitions. Word has length 87 [2021-11-07 01:28:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:29,522 INFO L470 AbstractCegarLoop]: Abstraction has 7400 states and 10223 transitions. [2021-11-07 01:28:29,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 01:28:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 7400 states and 10223 transitions. [2021-11-07 01:28:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:28:29,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:29,533 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:29,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:29,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:29,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-07 01:28:30,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:30,150 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:30,150 INFO L85 PathProgramCache]: Analyzing trace with hash -713312643, now seen corresponding path program 1 times [2021-11-07 01:28:30,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:30,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800627326] [2021-11-07 01:28:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:30,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:30,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:30,154 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:30,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:28:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:33,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:33,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:28:34,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:28:35,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:35,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800627326] [2021-11-07 01:28:35,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800627326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:35,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [184916271] [2021-11-07 01:28:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:35,076 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:35,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:28:35,078 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:28:35,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:28:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:38,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:38,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:28:39,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:28:39,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [184916271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:39,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168292777] [2021-11-07 01:28:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:39,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:28:39,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:28:39,750 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:28:39,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 01:28:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:41,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:28:41,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:28:43,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:28:44,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168292777] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:44,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:28:44,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5, 5, 5] total 22 [2021-11-07 01:28:44,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353331023] [2021-11-07 01:28:44,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:28:44,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:44,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:28:44,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:28:44,799 INFO L87 Difference]: Start difference. First operand 7400 states and 10223 transitions. Second operand has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 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 01:28:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:56,191 INFO L93 Difference]: Finished difference Result 30331 states and 42268 transitions. [2021-11-07 01:28:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:28:56,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 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 87 [2021-11-07 01:28:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:56,217 INFO L225 Difference]: With dead ends: 30331 [2021-11-07 01:28:56,217 INFO L226 Difference]: Without dead ends: 22968 [2021-11-07 01:28:56,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:28:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22968 states. [2021-11-07 01:28:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22968 to 7640. [2021-11-07 01:28:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7640 states, 7639 states have (on average 1.3550202906139548) internal successors, (10351), 7639 states have internal predecessors, (10351), 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 01:28:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7640 states to 7640 states and 10351 transitions. [2021-11-07 01:28:57,364 INFO L78 Accepts]: Start accepts. Automaton has 7640 states and 10351 transitions. Word has length 87 [2021-11-07 01:28:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:57,366 INFO L470 AbstractCegarLoop]: Abstraction has 7640 states and 10351 transitions. [2021-11-07 01:28:57,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 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 01:28:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 7640 states and 10351 transitions. [2021-11-07 01:28:57,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:28:57,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:57,377 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:57,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:57,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:57,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:57,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:57,991 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:57,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:57,991 INFO L85 PathProgramCache]: Analyzing trace with hash -754846597, now seen corresponding path program 1 times [2021-11-07 01:28:57,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:57,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34601084] [2021-11-07 01:28:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:57,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:57,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:57,996 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:57,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:29:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:01,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:01,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:29:02,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:29:02,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:02,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34601084] [2021-11-07 01:29:02,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34601084] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:02,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [558362318] [2021-11-07 01:29:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:02,932 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:02,932 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:02,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:29:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:06,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:06,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:29:07,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:29:07,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [558362318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:07,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280950468] [2021-11-07 01:29:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:07,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:29:07,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:29:07,710 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:29:07,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 01:29:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:09,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:29:09,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:29:10,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:29:11,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280950468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:11,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:29:11,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 01:29:11,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287110369] [2021-11-07 01:29:11,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:29:11,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:29:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:29:11,074 INFO L87 Difference]: Start difference. First operand 7640 states and 10351 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 01:29:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:14,622 INFO L93 Difference]: Finished difference Result 35428 states and 48155 transitions. [2021-11-07 01:29:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:29:14,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 89 [2021-11-07 01:29:14,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:14,660 INFO L225 Difference]: With dead ends: 35428 [2021-11-07 01:29:14,660 INFO L226 Difference]: Without dead ends: 27825 [2021-11-07 01:29:14,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:29:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27825 states. [2021-11-07 01:29:15,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27825 to 7664. [2021-11-07 01:29:15,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7664 states, 7663 states have (on average 1.3539083909695941) internal successors, (10375), 7663 states have internal predecessors, (10375), 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 01:29:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7664 states to 7664 states and 10375 transitions. [2021-11-07 01:29:15,832 INFO L78 Accepts]: Start accepts. Automaton has 7664 states and 10375 transitions. Word has length 89 [2021-11-07 01:29:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:15,833 INFO L470 AbstractCegarLoop]: Abstraction has 7664 states and 10375 transitions. [2021-11-07 01:29:15,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 01:29:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand 7664 states and 10375 transitions. [2021-11-07 01:29:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:29:15,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:15,847 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:15,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:16,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-07 01:29:16,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:16,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:16,472 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:16,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1961012183, now seen corresponding path program 1 times [2021-11-07 01:29:16,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:16,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426905674] [2021-11-07 01:29:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:16,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:16,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:16,478 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:16,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:29:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:20,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:20,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:29:20,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:29:21,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:21,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426905674] [2021-11-07 01:29:21,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426905674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:21,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [547821040] [2021-11-07 01:29:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:21,790 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:21,791 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:21,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:29:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:25,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:25,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:29:26,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:29:26,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [547821040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:26,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645205153] [2021-11-07 01:29:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:26,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:29:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:29:26,809 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:29:26,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 01:29:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:28,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:29:28,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:29:30,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:29:32,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645205153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:32,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:29:32,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5, 5, 5] total 22 [2021-11-07 01:29:32,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123806141] [2021-11-07 01:29:32,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:29:32,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:32,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:29:32,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:29:32,046 INFO L87 Difference]: Start difference. First operand 7664 states and 10375 transitions. Second operand has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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 01:29:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:45,328 INFO L93 Difference]: Finished difference Result 30691 states and 42324 transitions. [2021-11-07 01:29:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:29:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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 91 [2021-11-07 01:29:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:45,353 INFO L225 Difference]: With dead ends: 30691 [2021-11-07 01:29:45,353 INFO L226 Difference]: Without dead ends: 23064 [2021-11-07 01:29:45,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:29:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23064 states. [2021-11-07 01:29:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23064 to 7688. [2021-11-07 01:29:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7688 states, 7687 states have (on average 1.352803434369715) internal successors, (10399), 7687 states have internal predecessors, (10399), 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 01:29:46,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 10399 transitions. [2021-11-07 01:29:46,197 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 10399 transitions. Word has length 91 [2021-11-07 01:29:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:46,198 INFO L470 AbstractCegarLoop]: Abstraction has 7688 states and 10399 transitions. [2021-11-07 01:29:46,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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 01:29:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 10399 transitions. [2021-11-07 01:29:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:29:46,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:46,210 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:46,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:46,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-07 01:29:46,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:46,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:46,828 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash -252833751, now seen corresponding path program 1 times [2021-11-07 01:29:46,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:46,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474171031] [2021-11-07 01:29:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:46,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:46,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:46,832 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:46,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:29:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:50,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:50,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:29:51,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:29:52,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:52,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474171031] [2021-11-07 01:29:52,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474171031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:52,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1975478025] [2021-11-07 01:29:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:52,192 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:52,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:52,193 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:52,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:29:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:56,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:29:56,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:29:57,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1975478025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:57,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200103682] [2021-11-07 01:29:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:57,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:29:57,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:29:57,422 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:29:57,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 01:29:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:59,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:29:59,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:30:00,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:30:01,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200103682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:01,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:30:01,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2021-11-07 01:30:01,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606194297] [2021-11-07 01:30:01,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:30:01,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:01,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:30:01,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:30:01,407 INFO L87 Difference]: Start difference. First operand 7688 states and 10399 transitions. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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 01:30:03,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:03,557 INFO L93 Difference]: Finished difference Result 15375 states and 20813 transitions. [2021-11-07 01:30:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:30:03,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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 94 [2021-11-07 01:30:03,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:03,570 INFO L225 Difference]: With dead ends: 15375 [2021-11-07 01:30:03,570 INFO L226 Difference]: Without dead ends: 7708 [2021-11-07 01:30:03,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:30:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7708 states. [2021-11-07 01:30:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7708 to 7708. [2021-11-07 01:30:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7708 states, 7707 states have (on average 1.3520176462955755) internal successors, (10420), 7707 states have internal predecessors, (10420), 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 01:30:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7708 states to 7708 states and 10420 transitions. [2021-11-07 01:30:04,690 INFO L78 Accepts]: Start accepts. Automaton has 7708 states and 10420 transitions. Word has length 94 [2021-11-07 01:30:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:04,690 INFO L470 AbstractCegarLoop]: Abstraction has 7708 states and 10420 transitions. [2021-11-07 01:30:04,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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 01:30:04,690 INFO L276 IsEmpty]: Start isEmpty. Operand 7708 states and 10420 transitions. [2021-11-07 01:30:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:30:04,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:04,703 INFO L513 BasicCegarLoop]: trace histogram [4, 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 01:30:04,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:04,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:05,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:05,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:30:05,315 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:05,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:05,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1491452873, now seen corresponding path program 2 times [2021-11-07 01:30:05,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:05,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451078419] [2021-11-07 01:30:05,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:30:05,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:05,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:05,319 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:05,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d28375-fe0e-481a-9f46-9db054d0477e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process