./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH --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 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:15:27,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:15:27,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:15:27,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:15:27,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:15:27,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:15:27,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:15:27,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:15:27,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:15:27,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:15:27,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:15:27,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:15:27,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:15:27,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:15:27,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:15:27,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:15:27,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:15:27,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:15:27,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:15:27,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:15:27,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:15:27,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:15:27,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:15:27,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:15:27,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:15:27,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:15:27,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:15:27,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:15:27,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:15:27,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:15:27,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:15:27,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:15:27,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:15:27,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:15:27,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:15:27,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:15:27,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:15:27,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:15:27,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:15:27,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:15:27,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:15:27,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 05:15:27,352 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:15:27,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:15:27,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:15:27,357 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:15:27,357 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:15:27,357 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:15:27,358 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:15:27,358 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:15:27,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:15:27,364 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:15:27,366 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:15:27,366 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:15:27,366 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:15:27,366 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:15:27,367 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:15:27,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:15:27,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:15:27,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:15:27,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:15:27,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:15:27,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:15:27,369 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:15:27,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:15:27,369 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:15:27,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:15:27,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:15:27,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:15:27,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:15:27,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:15:27,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:15:27,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:15:27,371 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:15:27,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:15:27,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:15:27,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:15:27,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:15:27,373 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_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 [2021-11-03 05:15:27,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:15:27,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:15:27,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:15:27,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:15:27,683 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:15:27,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-03 05:15:27,757 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/data/b2f2a75fe/4b56268cc7554fe681055c45a01f4931/FLAGcf7c782ba [2021-11-03 05:15:28,534 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:15:28,534 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-03 05:15:28,592 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/data/b2f2a75fe/4b56268cc7554fe681055c45a01f4931/FLAGcf7c782ba [2021-11-03 05:15:29,082 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/data/b2f2a75fe/4b56268cc7554fe681055c45a01f4931 [2021-11-03 05:15:29,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:15:29,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:15:29,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:15:29,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:15:29,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:15:29,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:15:29" (1/1) ... [2021-11-03 05:15:29,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d4ed91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:29, skipping insertion in model container [2021-11-03 05:15:29,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:15:29" (1/1) ... [2021-11-03 05:15:29,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:15:29,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:15:30,565 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:15:30,823 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:15:31,823 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_6581f659-1611-4a04-b3ee-a1d83d6697cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-03 05:15:31,826 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_6581f659-1611-4a04-b3ee-a1d83d6697cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-03 05:15:31,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:15:31,886 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) [2021-11-03 05:15:31,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6095902c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:31, skipping insertion in model container [2021-11-03 05:15:31,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:15:31,887 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:15:31,890 INFO L168 Benchmark]: Toolchain (without parser) took 2801.35 ms. Allocated memory was 113.2 MB in the beginning and 144.7 MB in the end (delta: 31.5 MB). Free memory was 65.1 MB in the beginning and 58.7 MB in the end (delta: 6.4 MB). Peak memory consumption was 38.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:15:31,891 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 113.2 MB. Free memory was 84.0 MB in the beginning and 84.0 MB in the end (delta: 30.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:15:31,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2795.46 ms. Allocated memory was 113.2 MB in the beginning and 144.7 MB in the end (delta: 31.5 MB). Free memory was 64.8 MB in the beginning and 58.7 MB in the end (delta: 6.1 MB). Peak memory consumption was 38.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:15:31,894 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 113.2 MB. Free memory was 84.0 MB in the beginning and 84.0 MB in the end (delta: 30.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2795.46 ms. Allocated memory was 113.2 MB in the beginning and 144.7 MB in the end (delta: 31.5 MB). Free memory was 64.8 MB in the beginning and 58.7 MB in the end (delta: 6.1 MB). Peak memory consumption was 38.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5659]: 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_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH --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 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:15:34,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:15:34,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:15:34,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:15:34,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:15:34,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:15:34,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:15:34,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:15:34,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:15:34,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:15:34,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:15:34,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:15:34,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:15:34,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:15:34,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:15:34,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:15:34,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:15:34,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:15:34,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:15:34,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:15:34,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:15:34,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:15:34,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:15:34,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:15:34,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:15:34,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:15:34,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:15:34,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:15:34,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:15:34,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:15:34,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:15:34,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:15:34,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:15:34,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:15:34,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:15:34,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:15:34,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:15:34,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:15:34,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:15:34,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:15:34,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:15:34,333 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 05:15:34,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:15:34,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:15:34,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:15:34,363 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:15:34,363 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:15:34,364 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:15:34,364 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:15:34,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:15:34,364 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:15:34,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:15:34,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:15:34,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:15:34,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:15:34,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:15:34,367 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:15:34,368 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:15:34,368 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:15:34,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:15:34,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:15:34,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:15:34,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:15:34,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:15:34,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:15:34,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:15:34,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:15:34,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:15:34,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:15:34,370 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:15:34,371 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:15:34,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:15:34,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:15:34,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:15:34,371 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_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 104510927d9409ade9caf80490257750edc55f0d04f472d0e2cf5426e55ff4e4 [2021-11-03 05:15:34,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:15:34,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:15:34,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:15:34,759 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:15:34,760 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:15:34,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-03 05:15:34,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/data/1c3321d92/1e7108feccfc46f887094cce86146873/FLAG9bec75509 [2021-11-03 05:15:35,908 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:15:35,909 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-03 05:15:35,969 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/data/1c3321d92/1e7108feccfc46f887094cce86146873/FLAG9bec75509 [2021-11-03 05:15:36,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/data/1c3321d92/1e7108feccfc46f887094cce86146873 [2021-11-03 05:15:36,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:15:36,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:15:36,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:15:36,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:15:36,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:15:36,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:15:36" (1/1) ... [2021-11-03 05:15:36,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d802c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:36, skipping insertion in model container [2021-11-03 05:15:36,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:15:36" (1/1) ... [2021-11-03 05:15:36,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:15:36,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:15:38,941 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_6581f659-1611-4a04-b3ee-a1d83d6697cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-03 05:15:38,943 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_6581f659-1611-4a04-b3ee-a1d83d6697cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-03 05:15:38,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:15:39,053 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:15:39,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:15:39,495 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_6581f659-1611-4a04-b3ee-a1d83d6697cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-03 05:15:39,496 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_6581f659-1611-4a04-b3ee-a1d83d6697cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-03 05:15:39,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:15:39,551 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:15:39,926 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_6581f659-1611-4a04-b3ee-a1d83d6697cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307491,307504] [2021-11-03 05:15:39,926 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_6581f659-1611-4a04-b3ee-a1d83d6697cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i[307636,307649] [2021-11-03 05:15:39,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:15:40,248 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:15:40,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:40 WrapperNode [2021-11-03 05:15:40,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:15:40,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:15:40,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:15:40,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:15:40,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:40" (1/1) ... [2021-11-03 05:15:40,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:40" (1/1) ... [2021-11-03 05:15:40,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:15:40,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:15:40,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:15:40,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:15:40,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:40" (1/1) ... [2021-11-03 05:15:40,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:40" (1/1) ... [2021-11-03 05:15:40,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:40" (1/1) ... [2021-11-03 05:15:40,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:40" (1/1) ... [2021-11-03 05:15:41,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:40" (1/1) ... [2021-11-03 05:15:41,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:40" (1/1) ... [2021-11-03 05:15:41,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:40" (1/1) ... [2021-11-03 05:15:41,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:15:41,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:15:41,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:15:41,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:15:41,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:40" (1/1) ... [2021-11-03 05:15:41,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:15:41,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:15:41,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:15:41,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:15:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 05:15:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:15:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-03 05:15:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:15:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-03 05:15:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-03 05:15:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:15:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:15:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-03 05:15:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-03 05:15:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-03 05:15:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-03 05:15:41,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-03 05:15:41,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:15:41,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:15:41,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:15:41,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-03 05:15:41,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:15:41,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-03 05:15:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-03 05:15:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-03 05:15:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:15:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:15:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-03 05:15:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-03 05:15:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-03 05:15:41,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:15:41,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 05:15:41,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-03 05:15:41,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-03 05:15:41,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-03 05:15:41,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-03 05:15:41,572 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-03 05:19:17,410 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break: ldv_switch_1_#res := 0bv32; [2021-11-03 05:19:17,410 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break#2: ldv_switch_0_#res := 0bv32; [2021-11-03 05:19:17,411 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break: ldv_switch_0_#res := 0bv32; [2021-11-03 05:19:17,412 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-03 05:19:17,465 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:19:17,466 INFO L299 CfgBuilder]: Removed 2703 assume(true) statements. [2021-11-03 05:19:17,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:19:17 BoogieIcfgContainer [2021-11-03 05:19:17,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:19:17,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:19:17,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:19:17,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:19:17,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:15:36" (1/3) ... [2021-11-03 05:19:17,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc82f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:19:17, skipping insertion in model container [2021-11-03 05:19:17,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:15:40" (2/3) ... [2021-11-03 05:19:17,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc82f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:19:17, skipping insertion in model container [2021-11-03 05:19:17,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:19:17" (3/3) ... [2021-11-03 05:19:17,481 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-kaweth.cil.i [2021-11-03 05:19:17,487 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:19:17,488 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-11-03 05:19:17,559 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:19:17,573 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 [2021-11-03 05:19:17,574 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-11-03 05:19:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 3189 states, 3130 states have (on average 1.4987220447284344) internal successors, (4691), 3188 states have internal predecessors, (4691), 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) [2021-11-03 05:19:17,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:19:17,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:17,662 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:17,662 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:19:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:17,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1107920357, now seen corresponding path program 1 times [2021-11-03 05:19:17,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:17,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221155612] [2021-11-03 05:19:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:17,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:17,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:17,698 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:17,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:19:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:27,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 2872 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:19:27,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:27,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:28,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:28,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221155612] [2021-11-03 05:19:28,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221155612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:28,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:28,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:19:28,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836578185] [2021-11-03 05:19:28,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:19:28,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:28,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:19:28,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:19:28,107 INFO L87 Difference]: Start difference. First operand has 3189 states, 3130 states have (on average 1.4987220447284344) internal successors, (4691), 3188 states have internal predecessors, (4691), 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 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-03 05:19:31,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:31,275 INFO L93 Difference]: Finished difference Result 7249 states and 10617 transitions. [2021-11-03 05:19:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:19:31,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 60 [2021-11-03 05:19:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:31,319 INFO L225 Difference]: With dead ends: 7249 [2021-11-03 05:19:31,319 INFO L226 Difference]: Without dead ends: 3780 [2021-11-03 05:19:31,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:19:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-11-03 05:19:31,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3748. [2021-11-03 05:19:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3689 states have (on average 1.4339929520195174) internal successors, (5290), 3747 states have internal predecessors, (5290), 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) [2021-11-03 05:19:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 5290 transitions. [2021-11-03 05:19:31,568 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 5290 transitions. Word has length 60 [2021-11-03 05:19:31,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:31,569 INFO L470 AbstractCegarLoop]: Abstraction has 3748 states and 5290 transitions. [2021-11-03 05:19:31,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-03 05:19:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 5290 transitions. [2021-11-03 05:19:31,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 05:19:31,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:31,578 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:31,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:31,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:31,780 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:19:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:31,780 INFO L85 PathProgramCache]: Analyzing trace with hash -580581691, now seen corresponding path program 1 times [2021-11-03 05:19:31,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:31,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059643754] [2021-11-03 05:19:31,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:31,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:31,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:31,787 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:31,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:19:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:41,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:19:41,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:41,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:42,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:42,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059643754] [2021-11-03 05:19:42,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059643754] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:42,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:42,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:19:42,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296741210] [2021-11-03 05:19:42,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:19:42,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:42,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:19:42,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:19:42,095 INFO L87 Difference]: Start difference. First operand 3748 states and 5290 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2021-11-03 05:19:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:45,339 INFO L93 Difference]: Finished difference Result 10167 states and 14392 transitions. [2021-11-03 05:19:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:19:45,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2021-11-03 05:19:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:45,375 INFO L225 Difference]: With dead ends: 10167 [2021-11-03 05:19:45,376 INFO L226 Difference]: Without dead ends: 6487 [2021-11-03 05:19:45,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:19:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6487 states. [2021-11-03 05:19:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6487 to 6327. [2021-11-03 05:19:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6327 states, 6268 states have (on average 1.4440012763241863) internal successors, (9051), 6326 states have internal predecessors, (9051), 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) [2021-11-03 05:19:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6327 states to 6327 states and 9051 transitions. [2021-11-03 05:19:45,632 INFO L78 Accepts]: Start accepts. Automaton has 6327 states and 9051 transitions. Word has length 70 [2021-11-03 05:19:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:45,633 INFO L470 AbstractCegarLoop]: Abstraction has 6327 states and 9051 transitions. [2021-11-03 05:19:45,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2021-11-03 05:19:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 6327 states and 9051 transitions. [2021-11-03 05:19:45,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 05:19:45,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:45,637 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:45,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:45,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:45,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:19:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:45,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1869288537, now seen corresponding path program 1 times [2021-11-03 05:19:45,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:45,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969304813] [2021-11-03 05:19:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:45,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:45,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:45,868 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:45,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:19:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:19:55,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:55,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:55,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:55,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969304813] [2021-11-03 05:19:55,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969304813] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:55,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:55,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:19:55,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504258479] [2021-11-03 05:19:55,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:19:55,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:55,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:19:55,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:19:55,989 INFO L87 Difference]: Start difference. First operand 6327 states and 9051 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2021-11-03 05:19:59,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:59,247 INFO L93 Difference]: Finished difference Result 25054 states and 35920 transitions. [2021-11-03 05:19:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:19:59,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 76 [2021-11-03 05:19:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:59,368 INFO L225 Difference]: With dead ends: 25054 [2021-11-03 05:19:59,368 INFO L226 Difference]: Without dead ends: 18795 [2021-11-03 05:19:59,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:19:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18795 states. [2021-11-03 05:20:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18795 to 18511. [2021-11-03 05:20:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18511 states, 18452 states have (on average 1.4499783221331022) internal successors, (26755), 18510 states have internal predecessors, (26755), 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) [2021-11-03 05:20:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18511 states to 18511 states and 26755 transitions. [2021-11-03 05:20:00,191 INFO L78 Accepts]: Start accepts. Automaton has 18511 states and 26755 transitions. Word has length 76 [2021-11-03 05:20:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:00,193 INFO L470 AbstractCegarLoop]: Abstraction has 18511 states and 26755 transitions. [2021-11-03 05:20:00,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2021-11-03 05:20:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 18511 states and 26755 transitions. [2021-11-03 05:20:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-03 05:20:00,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:00,199 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:20:00,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:00,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:00,415 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:20:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:00,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1428555645, now seen corresponding path program 1 times [2021-11-03 05:20:00,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:00,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486812240] [2021-11-03 05:20:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:00,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:00,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:00,424 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:00,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:20:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:10,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 3003 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:20:10,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:20:11,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:20:11,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:11,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486812240] [2021-11-03 05:20:11,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486812240] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:20:11,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:20:11,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:20:11,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239351169] [2021-11-03 05:20:11,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:20:11,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:20:11,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:20:11,765 INFO L87 Difference]: Start difference. First operand 18511 states and 26755 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2021-11-03 05:20:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:15,317 INFO L93 Difference]: Finished difference Result 39882 states and 57490 transitions. [2021-11-03 05:20:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:20:15,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 109 [2021-11-03 05:20:15,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:15,374 INFO L225 Difference]: With dead ends: 39882 [2021-11-03 05:20:15,374 INFO L226 Difference]: Without dead ends: 21439 [2021-11-03 05:20:15,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:20:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21439 states. [2021-11-03 05:20:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21439 to 21395. [2021-11-03 05:20:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21395 states, 21336 states have (on average 1.4396794150731158) internal successors, (30717), 21394 states have internal predecessors, (30717), 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) [2021-11-03 05:20:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21395 states to 21395 states and 30717 transitions. [2021-11-03 05:20:16,235 INFO L78 Accepts]: Start accepts. Automaton has 21395 states and 30717 transitions. Word has length 109 [2021-11-03 05:20:16,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:16,238 INFO L470 AbstractCegarLoop]: Abstraction has 21395 states and 30717 transitions. [2021-11-03 05:20:16,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2021-11-03 05:20:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 21395 states and 30717 transitions. [2021-11-03 05:20:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-03 05:20:16,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:16,252 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:20:16,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:16,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:16,467 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:20:16,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:16,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2048557782, now seen corresponding path program 1 times [2021-11-03 05:20:16,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:16,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554341345] [2021-11-03 05:20:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:16,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:16,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:16,476 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:16,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:20:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:27,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:20:27,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:20:28,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:20:28,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:28,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554341345] [2021-11-03 05:20:28,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554341345] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:20:28,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:20:28,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:20:28,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117671861] [2021-11-03 05:20:28,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:20:28,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:28,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:20:28,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:20:28,751 INFO L87 Difference]: Start difference. First operand 21395 states and 30717 transitions. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 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) [2021-11-03 05:20:33,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:33,409 INFO L93 Difference]: Finished difference Result 67020 states and 95138 transitions. [2021-11-03 05:20:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:20:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 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 157 [2021-11-03 05:20:33,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:33,530 INFO L225 Difference]: With dead ends: 67020 [2021-11-03 05:20:33,530 INFO L226 Difference]: Without dead ends: 45693 [2021-11-03 05:20:33,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:20:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45693 states. [2021-11-03 05:20:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45693 to 21413. [2021-11-03 05:20:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21413 states, 21354 states have (on average 1.439308794605226) internal successors, (30735), 21412 states have internal predecessors, (30735), 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) [2021-11-03 05:20:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21413 states to 21413 states and 30735 transitions. [2021-11-03 05:20:35,217 INFO L78 Accepts]: Start accepts. Automaton has 21413 states and 30735 transitions. Word has length 157 [2021-11-03 05:20:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:35,217 INFO L470 AbstractCegarLoop]: Abstraction has 21413 states and 30735 transitions. [2021-11-03 05:20:35,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 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) [2021-11-03 05:20:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 21413 states and 30735 transitions. [2021-11-03 05:20:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-03 05:20:35,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:35,222 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:20:35,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:35,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:35,439 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:20:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1156334602, now seen corresponding path program 1 times [2021-11-03 05:20:35,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:35,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554133777] [2021-11-03 05:20:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:35,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:35,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:35,446 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:35,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:20:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:46,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 3316 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:20:46,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:20:46,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:20:47,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:47,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554133777] [2021-11-03 05:20:47,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554133777] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:20:47,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:20:47,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:20:47,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582040197] [2021-11-03 05:20:47,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:20:47,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:20:47,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:20:47,193 INFO L87 Difference]: Start difference. First operand 21413 states and 30735 transitions. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 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) [2021-11-03 05:20:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:52,696 INFO L93 Difference]: Finished difference Result 42788 states and 61436 transitions. [2021-11-03 05:20:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:20:52,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 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 163 [2021-11-03 05:20:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:52,779 INFO L225 Difference]: With dead ends: 42788 [2021-11-03 05:20:52,780 INFO L226 Difference]: Without dead ends: 21443 [2021-11-03 05:20:52,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:20:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-11-03 05:20:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 21443. [2021-11-03 05:20:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21443 states, 21384 states have (on average 1.438692480359147) internal successors, (30765), 21442 states have internal predecessors, (30765), 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) [2021-11-03 05:20:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21443 states to 21443 states and 30765 transitions. [2021-11-03 05:20:54,019 INFO L78 Accepts]: Start accepts. Automaton has 21443 states and 30765 transitions. Word has length 163 [2021-11-03 05:20:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:54,020 INFO L470 AbstractCegarLoop]: Abstraction has 21443 states and 30765 transitions. [2021-11-03 05:20:54,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 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) [2021-11-03 05:20:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 21443 states and 30765 transitions. [2021-11-03 05:20:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-03 05:20:54,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:54,025 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:20:54,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:54,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:54,239 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:20:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1255741942, now seen corresponding path program 1 times [2021-11-03 05:20:54,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:54,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467338082] [2021-11-03 05:20:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:54,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:54,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:54,245 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:54,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:21:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:21:05,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 3326 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:21:05,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:21:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:21:05,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:21:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:21:06,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:21:06,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467338082] [2021-11-03 05:21:06,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467338082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:21:06,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [994423930] [2021-11-03 05:21:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:21:06,373 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:21:06,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:21:06,375 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:21:06,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-03 05:21:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:21:09,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 3326 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:21:09,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:21:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:21:11,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:21:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:21:12,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [994423930] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:21:12,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:21:12,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-03 05:21:12,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262912170] [2021-11-03 05:21:12,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:21:12,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:21:12,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:21:12,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:21:12,437 INFO L87 Difference]: Start difference. First operand 21443 states and 30765 transitions. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 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) [2021-11-03 05:21:13,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:21:13,612 INFO L93 Difference]: Finished difference Result 42818 states and 61454 transitions. [2021-11-03 05:21:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:21:13,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 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 169 [2021-11-03 05:21:13,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:21:13,635 INFO L225 Difference]: With dead ends: 42818 [2021-11-03 05:21:13,635 INFO L226 Difference]: Without dead ends: 21443 [2021-11-03 05:21:13,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:21:13,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-11-03 05:21:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 21443. [2021-11-03 05:21:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21443 states, 21384 states have (on average 1.42003367003367) internal successors, (30366), 21442 states have internal predecessors, (30366), 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) [2021-11-03 05:21:14,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21443 states to 21443 states and 30366 transitions. [2021-11-03 05:21:14,833 INFO L78 Accepts]: Start accepts. Automaton has 21443 states and 30366 transitions. Word has length 169 [2021-11-03 05:21:14,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:21:14,833 INFO L470 AbstractCegarLoop]: Abstraction has 21443 states and 30366 transitions. [2021-11-03 05:21:14,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 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) [2021-11-03 05:21:14,834 INFO L276 IsEmpty]: Start isEmpty. Operand 21443 states and 30366 transitions. [2021-11-03 05:21:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-03 05:21:14,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:21:14,838 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:21:14,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-03 05:21:15,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:21:15,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:21:15,248 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:21:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:21:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash -273054118, now seen corresponding path program 1 times [2021-11-03 05:21:15,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:21:15,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157960458] [2021-11-03 05:21:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:21:15,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:21:15,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:21:15,254 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:21:15,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:21:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:21:26,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 3327 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:21:26,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:21:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:21:27,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:21:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:21:27,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:21:27,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157960458] [2021-11-03 05:21:27,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157960458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:21:27,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1142113013] [2021-11-03 05:21:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:21:27,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:21:27,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:21:27,655 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:21:27,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-03 05:21:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:21:31,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 3327 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:21:31,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:21:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:21:32,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:21:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:21:33,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1142113013] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:21:33,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:21:33,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-03 05:21:33,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032341966] [2021-11-03 05:21:33,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:21:33,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:21:33,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:21:33,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:21:33,944 INFO L87 Difference]: Start difference. First operand 21443 states and 30366 transitions. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 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) [2021-11-03 05:21:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:21:35,163 INFO L93 Difference]: Finished difference Result 42818 states and 60656 transitions. [2021-11-03 05:21:35,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:21:35,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 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 170 [2021-11-03 05:21:35,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:21:35,187 INFO L225 Difference]: With dead ends: 42818 [2021-11-03 05:21:35,187 INFO L226 Difference]: Without dead ends: 21443 [2021-11-03 05:21:35,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:21:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-11-03 05:21:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 21443. [2021-11-03 05:21:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21443 states, 21384 states have (on average 1.401374859708193) internal successors, (29967), 21442 states have internal predecessors, (29967), 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) [2021-11-03 05:21:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21443 states to 21443 states and 29967 transitions. [2021-11-03 05:21:36,595 INFO L78 Accepts]: Start accepts. Automaton has 21443 states and 29967 transitions. Word has length 170 [2021-11-03 05:21:36,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:21:36,595 INFO L470 AbstractCegarLoop]: Abstraction has 21443 states and 29967 transitions. [2021-11-03 05:21:36,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 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) [2021-11-03 05:21:36,595 INFO L276 IsEmpty]: Start isEmpty. Operand 21443 states and 29967 transitions. [2021-11-03 05:21:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-03 05:21:36,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:21:36,599 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:21:36,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:21:36,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:21:37,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:21:37,015 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:21:37,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:21:37,015 INFO L85 PathProgramCache]: Analyzing trace with hash 125646309, now seen corresponding path program 1 times [2021-11-03 05:21:37,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:21:37,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437987265] [2021-11-03 05:21:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:21:37,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:21:37,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:21:37,021 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:21:37,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:21:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:21:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 3328 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:21:48,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:21:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:21:48,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:21:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:21:49,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:21:49,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437987265] [2021-11-03 05:21:49,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437987265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:21:49,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1290317365] [2021-11-03 05:21:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:21:49,423 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:21:49,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:21:49,424 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:21:49,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-03 05:21:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:21:53,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 3328 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:21:53,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:21:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:21:54,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:21:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:21:55,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1290317365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:21:55,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:21:55,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-03 05:21:55,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154506853] [2021-11-03 05:21:55,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:21:55,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:21:55,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:21:55,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:21:55,925 INFO L87 Difference]: Start difference. First operand 21443 states and 29967 transitions. Second operand has 4 states, 4 states have (on average 78.75) internal successors, (315), 3 states have internal predecessors, (315), 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) [2021-11-03 05:21:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:21:57,206 INFO L93 Difference]: Finished difference Result 42818 states and 59858 transitions. [2021-11-03 05:21:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:21:57,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 3 states have internal predecessors, (315), 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 171 [2021-11-03 05:21:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:21:57,229 INFO L225 Difference]: With dead ends: 42818 [2021-11-03 05:21:57,229 INFO L226 Difference]: Without dead ends: 21443 [2021-11-03 05:21:57,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:21:57,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-11-03 05:21:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 21443. [2021-11-03 05:21:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21443 states, 21384 states have (on average 1.382716049382716) internal successors, (29568), 21442 states have internal predecessors, (29568), 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) [2021-11-03 05:21:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21443 states to 21443 states and 29568 transitions. [2021-11-03 05:21:58,405 INFO L78 Accepts]: Start accepts. Automaton has 21443 states and 29568 transitions. Word has length 171 [2021-11-03 05:21:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:21:58,405 INFO L470 AbstractCegarLoop]: Abstraction has 21443 states and 29568 transitions. [2021-11-03 05:21:58,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 3 states have internal predecessors, (315), 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) [2021-11-03 05:21:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 21443 states and 29568 transitions. [2021-11-03 05:21:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-03 05:21:58,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:21:58,410 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:21:58,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:21:58,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:21:58,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:21:58,823 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:21:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:21:58,823 INFO L85 PathProgramCache]: Analyzing trace with hash -399393387, now seen corresponding path program 1 times [2021-11-03 05:21:58,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:21:58,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589052358] [2021-11-03 05:21:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:21:58,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:21:58,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:21:58,831 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:21:58,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:22:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:10,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 3329 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:22:10,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:22:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:22:11,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:22:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:22:11,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:22:11,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589052358] [2021-11-03 05:22:11,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589052358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:22:11,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [613175421] [2021-11-03 05:22:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:11,520 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:22:11,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:22:11,520 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:22:11,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-03 05:22:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:15,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 3329 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:22:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:22:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:22:16,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:22:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:22:18,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [613175421] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:22:18,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:22:18,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-03 05:22:18,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333658492] [2021-11-03 05:22:18,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:22:18,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:22:18,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:22:18,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:22:18,354 INFO L87 Difference]: Start difference. First operand 21443 states and 29568 transitions. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 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) [2021-11-03 05:22:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:22:20,059 INFO L93 Difference]: Finished difference Result 44823 states and 61615 transitions. [2021-11-03 05:22:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:22:20,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 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 172 [2021-11-03 05:22:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:22:20,086 INFO L225 Difference]: With dead ends: 44823 [2021-11-03 05:22:20,087 INFO L226 Difference]: Without dead ends: 23448 [2021-11-03 05:22:20,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:22:20,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23448 states. [2021-11-03 05:22:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23448 to 23183. [2021-11-03 05:22:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.3600155682407888) internal successors, (31449), 23182 states have internal predecessors, (31449), 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) [2021-11-03 05:22:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 31449 transitions. [2021-11-03 05:22:21,374 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 31449 transitions. Word has length 172 [2021-11-03 05:22:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:22:21,375 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 31449 transitions. [2021-11-03 05:22:21,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 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) [2021-11-03 05:22:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 31449 transitions. [2021-11-03 05:22:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-03 05:22:21,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:22:21,379 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:22:21,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:22:21,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-03 05:22:21,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:22:21,814 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:22:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:22:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash 504394176, now seen corresponding path program 1 times [2021-11-03 05:22:21,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:22:21,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795914252] [2021-11-03 05:22:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:21,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:22:21,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:22:21,820 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:22:21,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:22:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:33,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 3330 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:22:33,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:22:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:22:34,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:22:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:22:34,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:22:34,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795914252] [2021-11-03 05:22:34,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795914252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:22:34,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [630554838] [2021-11-03 05:22:34,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:34,598 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:22:34,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:22:34,599 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:22:34,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 05:22:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:38,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 3330 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:22:38,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:22:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:22:40,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:22:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:22:41,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [630554838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:22:41,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:22:41,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-03 05:22:41,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343638185] [2021-11-03 05:22:41,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:22:41,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:22:41,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:22:41,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:22:41,486 INFO L87 Difference]: Start difference. First operand 23183 states and 31449 transitions. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 3 states have internal predecessors, (319), 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) [2021-11-03 05:22:43,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:22:43,023 INFO L93 Difference]: Finished difference Result 46298 states and 62822 transitions. [2021-11-03 05:22:43,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:22:43,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 3 states have internal predecessors, (319), 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 173 [2021-11-03 05:22:43,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:22:43,048 INFO L225 Difference]: With dead ends: 46298 [2021-11-03 05:22:43,048 INFO L226 Difference]: Without dead ends: 23183 [2021-11-03 05:22:43,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:22:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-03 05:22:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-03 05:22:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.3427607680332123) internal successors, (31050), 23182 states have internal predecessors, (31050), 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) [2021-11-03 05:22:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 31050 transitions. [2021-11-03 05:22:44,295 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 31050 transitions. Word has length 173 [2021-11-03 05:22:44,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:22:44,296 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 31050 transitions. [2021-11-03 05:22:44,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 3 states have internal predecessors, (319), 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) [2021-11-03 05:22:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 31050 transitions. [2021-11-03 05:22:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-03 05:22:44,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:22:44,299 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:22:44,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:22:44,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:22:44,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:22:44,716 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:22:44,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:22:44,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1542813488, now seen corresponding path program 1 times [2021-11-03 05:22:44,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:22:44,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217208613] [2021-11-03 05:22:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:44,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:22:44,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:22:44,722 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:22:44,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:22:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:56,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 3331 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:22:56,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:22:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:22:57,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:22:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:22:57,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:22:57,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217208613] [2021-11-03 05:22:57,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217208613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:22:57,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1527893439] [2021-11-03 05:22:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:57,696 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:22:57,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:22:57,698 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:22:57,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 05:23:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:23:02,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 3331 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:23:02,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:23:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:23:03,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:23:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:23:05,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1527893439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:23:05,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:23:05,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-03 05:23:05,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865092097] [2021-11-03 05:23:05,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:23:05,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:23:05,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:23:05,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:23:05,099 INFO L87 Difference]: Start difference. First operand 23183 states and 31050 transitions. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 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) [2021-11-03 05:23:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:23:06,576 INFO L93 Difference]: Finished difference Result 46298 states and 62024 transitions. [2021-11-03 05:23:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:23:06,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 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 174 [2021-11-03 05:23:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:23:06,601 INFO L225 Difference]: With dead ends: 46298 [2021-11-03 05:23:06,601 INFO L226 Difference]: Without dead ends: 23183 [2021-11-03 05:23:06,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:23:06,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-03 05:23:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-03 05:23:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.3255059678256358) internal successors, (30651), 23182 states have internal predecessors, (30651), 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) [2021-11-03 05:23:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 30651 transitions. [2021-11-03 05:23:07,902 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 30651 transitions. Word has length 174 [2021-11-03 05:23:07,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:23:07,902 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 30651 transitions. [2021-11-03 05:23:07,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 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) [2021-11-03 05:23:07,903 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 30651 transitions. [2021-11-03 05:23:07,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-03 05:23:07,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:23:07,910 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:23:07,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:23:08,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-03 05:23:08,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:23:08,331 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:23:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:23:08,331 INFO L85 PathProgramCache]: Analyzing trace with hash -581592677, now seen corresponding path program 1 times [2021-11-03 05:23:08,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:23:08,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022172617] [2021-11-03 05:23:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:23:08,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:23:08,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:23:08,337 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:23:08,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:23:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:23:20,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 3332 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:23:20,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:23:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:23:21,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:23:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:23:21,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:23:21,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022172617] [2021-11-03 05:23:21,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022172617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:23:21,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [415032355] [2021-11-03 05:23:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:23:21,634 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:23:21,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:23:21,651 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:23:21,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 05:23:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:23:26,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 3332 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:23:26,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:23:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:23:27,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:23:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:23:28,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [415032355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:23:28,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:23:28,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-03 05:23:28,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366111903] [2021-11-03 05:23:28,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:23:28,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:23:28,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:23:28,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:23:28,964 INFO L87 Difference]: Start difference. First operand 23183 states and 30651 transitions. Second operand has 4 states, 4 states have (on average 80.75) internal successors, (323), 3 states have internal predecessors, (323), 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) [2021-11-03 05:23:30,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:23:30,497 INFO L93 Difference]: Finished difference Result 46298 states and 61226 transitions. [2021-11-03 05:23:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:23:30,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.75) internal successors, (323), 3 states have internal predecessors, (323), 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 175 [2021-11-03 05:23:30,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:23:30,522 INFO L225 Difference]: With dead ends: 46298 [2021-11-03 05:23:30,522 INFO L226 Difference]: Without dead ends: 23183 [2021-11-03 05:23:30,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:23:30,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-03 05:23:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-03 05:23:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.3082511676180593) internal successors, (30252), 23182 states have internal predecessors, (30252), 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) [2021-11-03 05:23:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 30252 transitions. [2021-11-03 05:23:31,871 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 30252 transitions. Word has length 175 [2021-11-03 05:23:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:23:31,872 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 30252 transitions. [2021-11-03 05:23:31,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.75) internal successors, (323), 3 states have internal predecessors, (323), 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) [2021-11-03 05:23:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 30252 transitions. [2021-11-03 05:23:31,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-03 05:23:31,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:23:31,874 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:23:31,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-03 05:23:32,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:23:32,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:23:32,275 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:23:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:23:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash -848369653, now seen corresponding path program 1 times [2021-11-03 05:23:32,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:23:32,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152422758] [2021-11-03 05:23:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:23:32,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:23:32,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:23:32,282 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:23:32,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:23:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:23:44,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 3333 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:23:44,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:23:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:23:44,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:23:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:23:45,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:23:45,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152422758] [2021-11-03 05:23:45,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152422758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:23:45,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2129666682] [2021-11-03 05:23:45,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:23:45,315 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:23:45,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:23:45,315 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:23:45,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 05:23:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:23:49,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 3333 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:23:49,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:23:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:23:51,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:23:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:23:52,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2129666682] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:23:52,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:23:52,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-03 05:23:52,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589094354] [2021-11-03 05:23:52,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:23:52,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:23:52,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:23:52,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:23:52,526 INFO L87 Difference]: Start difference. First operand 23183 states and 30252 transitions. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 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) [2021-11-03 05:23:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:23:54,076 INFO L93 Difference]: Finished difference Result 46298 states and 60428 transitions. [2021-11-03 05:23:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:23:54,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 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 176 [2021-11-03 05:23:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:23:54,101 INFO L225 Difference]: With dead ends: 46298 [2021-11-03 05:23:54,101 INFO L226 Difference]: Without dead ends: 23183 [2021-11-03 05:23:54,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 690 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:23:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-03 05:23:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-03 05:23:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.2909963674104825) internal successors, (29853), 23182 states have internal predecessors, (29853), 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) [2021-11-03 05:23:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 29853 transitions. [2021-11-03 05:23:55,559 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 29853 transitions. Word has length 176 [2021-11-03 05:23:55,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:23:55,560 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 29853 transitions. [2021-11-03 05:23:55,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 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) [2021-11-03 05:23:55,560 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 29853 transitions. [2021-11-03 05:23:55,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-03 05:23:55,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:23:55,562 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:23:55,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:23:55,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:23:55,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:23:55,966 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:23:55,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:23:55,966 INFO L85 PathProgramCache]: Analyzing trace with hash -528372362, now seen corresponding path program 1 times [2021-11-03 05:23:55,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:23:55,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101996139] [2021-11-03 05:23:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:23:55,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:23:55,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:23:55,972 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:23:55,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 05:24:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:24:08,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 3334 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:24:08,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:24:08,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:24:09,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:24:09,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101996139] [2021-11-03 05:24:09,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101996139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:24:09,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1357307799] [2021-11-03 05:24:09,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:24:09,221 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:24:09,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:24:09,229 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:24:09,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-03 05:24:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:24:13,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 3334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:24:13,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:24:15,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:24:16,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1357307799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:24:16,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:24:16,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-03 05:24:16,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897668539] [2021-11-03 05:24:16,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:24:16,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:24:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:24:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:24:16,643 INFO L87 Difference]: Start difference. First operand 23183 states and 29853 transitions. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 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) [2021-11-03 05:24:18,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:24:18,259 INFO L93 Difference]: Finished difference Result 46298 states and 59630 transitions. [2021-11-03 05:24:18,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:24:18,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 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 177 [2021-11-03 05:24:18,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:24:18,283 INFO L225 Difference]: With dead ends: 46298 [2021-11-03 05:24:18,283 INFO L226 Difference]: Without dead ends: 23183 [2021-11-03 05:24:18,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:24:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-03 05:24:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-03 05:24:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.273741567202906) internal successors, (29454), 23182 states have internal predecessors, (29454), 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) [2021-11-03 05:24:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 29454 transitions. [2021-11-03 05:24:19,871 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 29454 transitions. Word has length 177 [2021-11-03 05:24:19,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:24:19,871 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 29454 transitions. [2021-11-03 05:24:19,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 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) [2021-11-03 05:24:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 29454 transitions. [2021-11-03 05:24:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-03 05:24:19,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:24:19,874 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:24:19,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-03 05:24:20,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:24:20,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:24:20,275 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:24:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:24:20,275 INFO L85 PathProgramCache]: Analyzing trace with hash 801758022, now seen corresponding path program 1 times [2021-11-03 05:24:20,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:24:20,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843247175] [2021-11-03 05:24:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:24:20,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:24:20,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:24:20,282 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:24:20,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 05:24:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:24:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 3335 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:24:32,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:24:33,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:24:33,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:24:33,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843247175] [2021-11-03 05:24:33,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843247175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:24:33,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1165248844] [2021-11-03 05:24:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:24:33,610 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:24:33,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:24:33,611 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:24:33,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-03 05:24:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:24:38,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 3335 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:24:38,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:24:39,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:24:41,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1165248844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:24:41,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:24:41,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-03 05:24:41,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053867003] [2021-11-03 05:24:41,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:24:41,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:24:41,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:24:41,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:24:41,237 INFO L87 Difference]: Start difference. First operand 23183 states and 29454 transitions. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 3 states have internal predecessors, (329), 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) [2021-11-03 05:24:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:24:43,018 INFO L93 Difference]: Finished difference Result 46298 states and 58832 transitions. [2021-11-03 05:24:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:24:43,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 3 states have internal predecessors, (329), 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 178 [2021-11-03 05:24:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:24:43,040 INFO L225 Difference]: With dead ends: 46298 [2021-11-03 05:24:43,040 INFO L226 Difference]: Without dead ends: 23183 [2021-11-03 05:24:43,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:24:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-03 05:24:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-03 05:24:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.2564867669953295) internal successors, (29055), 23182 states have internal predecessors, (29055), 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) [2021-11-03 05:24:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 29055 transitions. [2021-11-03 05:24:44,549 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 29055 transitions. Word has length 178 [2021-11-03 05:24:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:24:44,549 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 29055 transitions. [2021-11-03 05:24:44,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 3 states have internal predecessors, (329), 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) [2021-11-03 05:24:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 29055 transitions. [2021-11-03 05:24:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-03 05:24:44,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:24:44,552 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:24:44,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 05:24:44,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-03 05:24:44,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:24:44,953 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:24:44,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:24:44,953 INFO L85 PathProgramCache]: Analyzing trace with hash -913724079, now seen corresponding path program 1 times [2021-11-03 05:24:44,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:24:44,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118141145] [2021-11-03 05:24:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:24:44,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:24:44,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:24:44,959 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:24:44,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 05:24:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:24:57,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 3336 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:24:57,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:24:57,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:24:58,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:24:58,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118141145] [2021-11-03 05:24:58,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118141145] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:24:58,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1672316661] [2021-11-03 05:24:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:24:58,455 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:24:58,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:24:58,455 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:24:58,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-03 05:25:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:03,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 3336 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:25:03,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:25:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:25:04,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:25:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:25:06,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1672316661] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:25:06,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:25:06,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-03 05:25:06,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104628003] [2021-11-03 05:25:06,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:25:06,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:25:06,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:25:06,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:25:06,363 INFO L87 Difference]: Start difference. First operand 23183 states and 29055 transitions. Second operand has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 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) [2021-11-03 05:25:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:25:08,119 INFO L93 Difference]: Finished difference Result 46298 states and 58034 transitions. [2021-11-03 05:25:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:25:08,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 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 179 [2021-11-03 05:25:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:25:08,142 INFO L225 Difference]: With dead ends: 46298 [2021-11-03 05:25:08,142 INFO L226 Difference]: Without dead ends: 23183 [2021-11-03 05:25:08,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:25:08,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-03 05:25:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-03 05:25:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.239231966787753) internal successors, (28656), 23182 states have internal predecessors, (28656), 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) [2021-11-03 05:25:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 28656 transitions. [2021-11-03 05:25:09,825 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 28656 transitions. Word has length 179 [2021-11-03 05:25:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:25:09,825 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 28656 transitions. [2021-11-03 05:25:09,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 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) [2021-11-03 05:25:09,826 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 28656 transitions. [2021-11-03 05:25:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-03 05:25:09,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:25:09,828 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:25:09,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 05:25:10,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-03 05:25:10,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:25:10,237 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:25:10,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:25:10,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1741054593, now seen corresponding path program 1 times [2021-11-03 05:25:10,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:25:10,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138371405] [2021-11-03 05:25:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:10,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:25:10,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:25:10,243 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:25:10,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 05:25:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:22,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 3337 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:25:22,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:25:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:25:23,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:25:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:25:23,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:25:23,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138371405] [2021-11-03 05:25:23,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138371405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:25:23,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [281392781] [2021-11-03 05:25:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:23,969 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:25:23,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:25:23,970 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:25:23,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 05:25:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:29,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 3337 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:25:29,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:25:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:25:30,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:25:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:25:32,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [281392781] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:25:32,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:25:32,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 12 [2021-11-03 05:25:32,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953923281] [2021-11-03 05:25:32,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:25:32,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:25:32,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:25:32,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:25:32,144 INFO L87 Difference]: Start difference. First operand 23183 states and 28656 transitions. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 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) [2021-11-03 05:25:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:25:34,043 INFO L93 Difference]: Finished difference Result 46298 states and 57236 transitions. [2021-11-03 05:25:34,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:25:34,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 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 180 [2021-11-03 05:25:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:25:34,065 INFO L225 Difference]: With dead ends: 46298 [2021-11-03 05:25:34,065 INFO L226 Difference]: Without dead ends: 23183 [2021-11-03 05:25:34,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 706 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:25:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-11-03 05:25:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 23183. [2021-11-03 05:25:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23183 states, 23124 states have (on average 1.2219771665801764) internal successors, (28257), 23182 states have internal predecessors, (28257), 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) [2021-11-03 05:25:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 28257 transitions. [2021-11-03 05:25:35,791 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 28257 transitions. Word has length 180 [2021-11-03 05:25:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:25:35,791 INFO L470 AbstractCegarLoop]: Abstraction has 23183 states and 28257 transitions. [2021-11-03 05:25:35,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 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) [2021-11-03 05:25:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 28257 transitions. [2021-11-03 05:25:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-03 05:25:35,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:25:35,793 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:25:35,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-03 05:25:36,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-03 05:25:36,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:25:36,195 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:25:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:25:36,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1741114175, now seen corresponding path program 1 times [2021-11-03 05:25:36,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:25:36,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178176836] [2021-11-03 05:25:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:36,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:25:36,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:25:36,201 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:25:36,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-03 05:25:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:49,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 3337 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:25:49,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:25:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:25:49,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:25:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:25:50,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:25:50,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178176836] [2021-11-03 05:25:50,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178176836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:25:50,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [807501515] [2021-11-03 05:25:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:50,094 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:25:50,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:25:50,095 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:25:50,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-03 05:25:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:55,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 3337 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:25:55,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:25:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:25:56,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:25:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:25:56,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [807501515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:25:56,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655439664] [2021-11-03 05:25:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:56,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:25:56,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:25:56,554 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:25:56,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-03 05:26:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:26:02,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 3337 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:26:02,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:26:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:26:02,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:26:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:26:03,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655439664] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-03 05:26:03,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-03 05:26:03,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6, 6, 6, 6] total 15 [2021-11-03 05:26:03,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20495758] [2021-11-03 05:26:03,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:26:03,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:26:03,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:26:03,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:26:03,261 INFO L87 Difference]: Start difference. First operand 23183 states and 28257 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2021-11-03 05:26:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:26:09,151 INFO L93 Difference]: Finished difference Result 59827 states and 73358 transitions. [2021-11-03 05:26:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:26:09,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 180 [2021-11-03 05:26:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:26:09,354 INFO L225 Difference]: With dead ends: 59827 [2021-11-03 05:26:09,355 INFO L226 Difference]: Without dead ends: 59709 [2021-11-03 05:26:09,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:26:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59709 states. [2021-11-03 05:26:11,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59709 to 23105. [2021-11-03 05:26:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23105 states, 23100 states have (on average 1.2055844155844155) internal successors, (27849), 23104 states have internal predecessors, (27849), 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) [2021-11-03 05:26:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23105 states to 23105 states and 27849 transitions. [2021-11-03 05:26:11,721 INFO L78 Accepts]: Start accepts. Automaton has 23105 states and 27849 transitions. Word has length 180 [2021-11-03 05:26:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:26:11,722 INFO L470 AbstractCegarLoop]: Abstraction has 23105 states and 27849 transitions. [2021-11-03 05:26:11,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2021-11-03 05:26:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 23105 states and 27849 transitions. [2021-11-03 05:26:11,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-11-03 05:26:11,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:11,738 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:26:11,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-03 05:26:12,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-03 05:26:12,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-03 05:26:12,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:26:12,343 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:26:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1554616817, now seen corresponding path program 1 times [2021-11-03 05:26:12,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:26:12,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825429161] [2021-11-03 05:26:12,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:12,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:26:12,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:26:12,351 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:26:12,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-03 05:26:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:26:27,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 4418 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:26:27,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:26:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:26:29,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:26:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:26:30,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:26:30,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825429161] [2021-11-03 05:26:30,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825429161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:26:30,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1674779347] [2021-11-03 05:26:30,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:30,592 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:26:30,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:26:30,592 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:26:30,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-03 05:26:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:26:37,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 4418 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:26:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:26:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:26:38,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:26:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-03 05:26:38,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1674779347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:26:38,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:26:38,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-03 05:26:38,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522282961] [2021-11-03 05:26:38,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:26:38,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:26:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:26:38,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:26:38,798 INFO L87 Difference]: Start difference. First operand 23105 states and 27849 transitions. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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) [2021-11-03 05:26:44,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:26:44,173 INFO L93 Difference]: Finished difference Result 54522 states and 65639 transitions. [2021-11-03 05:26:44,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:26:44,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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 381 [2021-11-03 05:26:44,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:26:44,205 INFO L225 Difference]: With dead ends: 54522 [2021-11-03 05:26:44,205 INFO L226 Difference]: Without dead ends: 31485 [2021-11-03 05:26:44,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1520 GetRequests, 1511 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:26:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31485 states. [2021-11-03 05:26:47,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31485 to 31329. [2021-11-03 05:26:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31329 states, 31324 states have (on average 1.2013791342101903) internal successors, (37632), 31328 states have internal predecessors, (37632), 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) [2021-11-03 05:26:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31329 states to 31329 states and 37632 transitions. [2021-11-03 05:26:47,323 INFO L78 Accepts]: Start accepts. Automaton has 31329 states and 37632 transitions. Word has length 381 [2021-11-03 05:26:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:26:47,324 INFO L470 AbstractCegarLoop]: Abstraction has 31329 states and 37632 transitions. [2021-11-03 05:26:47,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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) [2021-11-03 05:26:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 31329 states and 37632 transitions. [2021-11-03 05:26:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-11-03 05:26:47,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:47,344 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:26:47,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-03 05:26:47,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-03 05:26:47,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:26:47,745 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 56 more)] === [2021-11-03 05:26:47,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:47,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1056070281, now seen corresponding path program 1 times [2021-11-03 05:26:47,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:26:47,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344253514] [2021-11-03 05:26:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:47,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:26:47,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:26:47,752 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:26:47,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-03 05:27:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:03,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 4437 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:27:03,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:27:04,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-03 05:27:06,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:06,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344253514] [2021-11-03 05:27:06,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344253514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:27:06,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1440134653] [2021-11-03 05:27:06,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:06,560 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:27:06,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:27:06,561 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:27:06,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6581f659-1611-4a04-b3ee-a1d83d6697cc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-03 05:27:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:13,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 4437 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:27:13,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:27:14,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-03 05:27:16,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1440134653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:16,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:27:16,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6] total 22 [2021-11-03 05:27:16,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293444397] [2021-11-03 05:27:16,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 05:27:16,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:16,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 05:27:16,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-03 05:27:16,233 INFO L87 Difference]: Start difference. First operand 31329 states and 37632 transitions. Second operand has 14 states, 14 states have (on average 27.714285714285715) internal successors, (388), 14 states have internal predecessors, (388), 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)