./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:39,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:39,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:39,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:39,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:39,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:39,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:39,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:39,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:39,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:39,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:39,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:39,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:39,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:39,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:39,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:39,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:39,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:39,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:39,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:39,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:39,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:39,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:39,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:39,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:39,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:39,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:39,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:39,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:39,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:39,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:39,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:39,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:39,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:39,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:39,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:39,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:39,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:39,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:39,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:39,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:39,308 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:44:39,357 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:39,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:39,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:39,359 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:39,359 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:39,359 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:39,359 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:44:39,359 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:39,366 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:39,366 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:44:39,367 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:44:39,367 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:39,368 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:44:39,368 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:44:39,368 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:44:39,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:39,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:44:39,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:39,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:39,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:39,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:39,370 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:39,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:39,371 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:39,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:39,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:39,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:39,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:39,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:39,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:39,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:39,374 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:44:39,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:44:39,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:39,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:39,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:39,375 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_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b [2021-11-07 01:44:39,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:39,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:39,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:39,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:39,683 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:39,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 01:44:39,785 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/data/203dfae6f/8a4c0853aa884dc093be41ae0a68e184/FLAG86174cfaf [2021-11-07 01:44:40,463 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:40,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 01:44:40,492 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/data/203dfae6f/8a4c0853aa884dc093be41ae0a68e184/FLAG86174cfaf [2021-11-07 01:44:40,579 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/data/203dfae6f/8a4c0853aa884dc093be41ae0a68e184 [2021-11-07 01:44:40,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:40,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:40,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:40,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:40,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:40,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:40" (1/1) ... [2021-11-07 01:44:40,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2637e0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:40, skipping insertion in model container [2021-11-07 01:44:40,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:40" (1/1) ... [2021-11-07 01:44:40,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:40,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:41,499 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_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2021-11-07 01:44:41,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:41,566 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:44:41,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@67227c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:41, skipping insertion in model container [2021-11-07 01:44:41,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:41,569 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:44:41,572 INFO L168 Benchmark]: Toolchain (without parser) took 987.03 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 41.3 MB in the beginning and 57.0 MB in the end (delta: -15.6 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:41,572 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 86.0 MB. Free memory was 63.7 MB in the beginning and 63.6 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:44:41,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 984.57 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 41.1 MB in the beginning and 57.0 MB in the end (delta: -15.9 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:41,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 86.0 MB. Free memory was 63.7 MB in the beginning and 63.6 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 984.57 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 41.1 MB in the beginning and 57.0 MB in the end (delta: -15.9 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3618]: 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_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:43,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:43,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:43,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:43,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:43,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:43,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:43,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:43,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:43,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:43,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:43,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:43,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:43,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:43,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:43,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:43,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:43,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:43,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:43,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:43,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:43,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:43,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:43,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:43,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:43,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:43,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:43,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:43,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:43,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:43,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:43,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:43,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:43,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:43,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:43,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:43,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:43,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:43,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:43,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:43,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:43,844 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:44:43,877 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:43,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:43,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:43,879 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:43,879 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:43,880 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:43,880 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:43,880 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:43,880 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:43,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:43,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:43,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:43,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:43,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:43,882 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:43,883 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:44:43,883 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:44:43,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:43,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:43,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:43,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:43,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:44:43,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:43,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:43,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:43,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:43,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:43,886 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:44:43,886 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:43,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:43,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:43,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:43,887 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_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b [2021-11-07 01:44:44,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:44,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:44,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:44,245 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:44,246 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:44,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 01:44:44,306 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/data/f4538dcc8/95cb259120e8443386ae1777e0af3161/FLAG0a5012414 [2021-11-07 01:44:45,051 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:45,053 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 01:44:45,093 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/data/f4538dcc8/95cb259120e8443386ae1777e0af3161/FLAG0a5012414 [2021-11-07 01:44:45,183 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/data/f4538dcc8/95cb259120e8443386ae1777e0af3161 [2021-11-07 01:44:45,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:45,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:45,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:45,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:45,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:45,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:45" (1/1) ... [2021-11-07 01:44:45,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59bed3b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:45, skipping insertion in model container [2021-11-07 01:44:45,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:45" (1/1) ... [2021-11-07 01:44:45,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:45,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:46,155 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_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2021-11-07 01:44:46,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:46,236 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:44:46,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:46,447 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_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2021-11-07 01:44:46,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:46,522 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:44:46,734 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_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2021-11-07 01:44:46,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:46,818 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:44:46,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:46 WrapperNode [2021-11-07 01:44:46,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:46,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:46,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:44:46,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:44:46,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:46" (1/1) ... [2021-11-07 01:44:46,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:46" (1/1) ... [2021-11-07 01:44:46,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:46,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:44:46,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:44:46,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:44:46,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:46" (1/1) ... [2021-11-07 01:44:46,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:46" (1/1) ... [2021-11-07 01:44:47,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:46" (1/1) ... [2021-11-07 01:44:47,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:46" (1/1) ... [2021-11-07 01:44:47,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:46" (1/1) ... [2021-11-07 01:44:47,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:46" (1/1) ... [2021-11-07 01:44:47,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:46" (1/1) ... [2021-11-07 01:44:47,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:44:47,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:44:47,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:44:47,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:44:47,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:46" (1/1) ... [2021-11-07 01:44:47,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:47,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:47,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:44:47,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:44:47,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:44:47,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:44:47,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:44:47,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:44:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:44:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:44:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:44:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:44:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:44:47,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:44:47,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:44:47,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:44:47,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:44:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:44:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:44:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:44:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:44:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:44:47,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:44:53,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:44:53,935 INFO L299 CfgBuilder]: Removed 188 assume(true) statements. [2021-11-07 01:44:53,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:53 BoogieIcfgContainer [2021-11-07 01:44:53,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:44:53,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:44:53,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:44:53,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:44:53,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:45" (1/3) ... [2021-11-07 01:44:53,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bfa31b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:53, skipping insertion in model container [2021-11-07 01:44:53,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:46" (2/3) ... [2021-11-07 01:44:53,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bfa31b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:53, skipping insertion in model container [2021-11-07 01:44:53,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:53" (3/3) ... [2021-11-07 01:44:53,947 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 01:44:53,953 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:44:53,953 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:44:54,003 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:44:54,008 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:44:54,009 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:44:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 168 states have (on average 1.3988095238095237) internal successors, (235), 173 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:44:54,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:54,034 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:54,035 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:54,040 INFO L85 PathProgramCache]: Analyzing trace with hash -21777128, now seen corresponding path program 1 times [2021-11-07 01:44:54,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:54,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542225155] [2021-11-07 01:44:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:54,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:54,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:54,060 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:54,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:44:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:44:54,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:54,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:54,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:54,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542225155] [2021-11-07 01:44:54,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542225155] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:54,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:54,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:44:54,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252566629] [2021-11-07 01:44:54,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:44:54,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:54,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:44:54,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:54,645 INFO L87 Difference]: Start difference. First operand has 174 states, 168 states have (on average 1.3988095238095237) internal successors, (235), 173 states have internal predecessors, (235), 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 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:54,705 INFO L93 Difference]: Finished difference Result 344 states and 465 transitions. [2021-11-07 01:44:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:44:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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 17 [2021-11-07 01:44:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:54,723 INFO L225 Difference]: With dead ends: 344 [2021-11-07 01:44:54,723 INFO L226 Difference]: Without dead ends: 166 [2021-11-07 01:44:54,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:54,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-07 01:44:54,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-11-07 01:44:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.31055900621118) internal successors, (211), 165 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 211 transitions. [2021-11-07 01:44:54,774 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 211 transitions. Word has length 17 [2021-11-07 01:44:54,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:54,775 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 211 transitions. [2021-11-07 01:44:54,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 211 transitions. [2021-11-07 01:44:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:44:54,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:54,777 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:54,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:54,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:54,992 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:54,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1032894378, now seen corresponding path program 1 times [2021-11-07 01:44:54,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:54,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16541651] [2021-11-07 01:44:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:54,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:54,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:54,998 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:55,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:44:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:55,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:55,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:55,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:55,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16541651] [2021-11-07 01:44:55,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16541651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:55,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:55,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:55,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148335521] [2021-11-07 01:44:55,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:55,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:55,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:55,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:55,508 INFO L87 Difference]: Start difference. First operand 166 states and 211 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:56,002 INFO L93 Difference]: Finished difference Result 584 states and 761 transitions. [2021-11-07 01:44:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:56,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 17 [2021-11-07 01:44:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:56,011 INFO L225 Difference]: With dead ends: 584 [2021-11-07 01:44:56,011 INFO L226 Difference]: Without dead ends: 425 [2021-11-07 01:44:56,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:56,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-07 01:44:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2021-11-07 01:44:56,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.3166666666666667) internal successors, (553), 424 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 553 transitions. [2021-11-07 01:44:56,076 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 553 transitions. Word has length 17 [2021-11-07 01:44:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:56,077 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 553 transitions. [2021-11-07 01:44:56,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 553 transitions. [2021-11-07 01:44:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:44:56,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:56,080 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] [2021-11-07 01:44:56,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:56,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:56,291 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:56,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:56,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1262223031, now seen corresponding path program 1 times [2021-11-07 01:44:56,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:56,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339580955] [2021-11-07 01:44:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:56,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:56,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:56,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:56,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:44:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:56,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:56,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:56,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:56,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:56,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339580955] [2021-11-07 01:44:56,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339580955] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:56,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:56,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:44:56,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83609409] [2021-11-07 01:44:56,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:44:56,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:56,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:44:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:44:56,867 INFO L87 Difference]: Start difference. First operand 425 states and 553 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:57,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:57,070 INFO L93 Difference]: Finished difference Result 1137 states and 1478 transitions. [2021-11-07 01:44:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:44:57,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 01:44:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:57,075 INFO L225 Difference]: With dead ends: 1137 [2021-11-07 01:44:57,076 INFO L226 Difference]: Without dead ends: 719 [2021-11-07 01:44:57,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:44:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-07 01:44:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 428. [2021-11-07 01:44:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 423 states have (on average 1.3120567375886525) internal successors, (555), 427 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 555 transitions. [2021-11-07 01:44:57,114 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 555 transitions. Word has length 29 [2021-11-07 01:44:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:57,115 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 555 transitions. [2021-11-07 01:44:57,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:57,116 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 555 transitions. [2021-11-07 01:44:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:44:57,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:57,123 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] [2021-11-07 01:44:57,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:57,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:57,336 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash 512843913, now seen corresponding path program 1 times [2021-11-07 01:44:57,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:57,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054269262] [2021-11-07 01:44:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:57,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:57,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:57,340 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:57,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:44:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:57,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:57,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:58,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:58,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:58,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054269262] [2021-11-07 01:44:58,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054269262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:58,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:58,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:44:58,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618174060] [2021-11-07 01:44:58,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:58,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:58,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:58,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:58,442 INFO L87 Difference]: Start difference. First operand 428 states and 555 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:58,649 INFO L93 Difference]: Finished difference Result 1268 states and 1650 transitions. [2021-11-07 01:44:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:58,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 01:44:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:58,656 INFO L225 Difference]: With dead ends: 1268 [2021-11-07 01:44:58,656 INFO L226 Difference]: Without dead ends: 847 [2021-11-07 01:44:58,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:58,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-07 01:44:58,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 835. [2021-11-07 01:44:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 830 states have (on average 1.3096385542168674) internal successors, (1087), 834 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:58,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1087 transitions. [2021-11-07 01:44:58,720 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1087 transitions. Word has length 29 [2021-11-07 01:44:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:58,720 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1087 transitions. [2021-11-07 01:44:58,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1087 transitions. [2021-11-07 01:44:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:44:58,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:58,722 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] [2021-11-07 01:44:58,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:58,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:58,936 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:44:58,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:58,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1281701350, now seen corresponding path program 1 times [2021-11-07 01:44:58,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:58,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876046171] [2021-11-07 01:44:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:58,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:58,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:58,940 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:58,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:44:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:59,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:59,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:59,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:00,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:00,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876046171] [2021-11-07 01:45:00,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876046171] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:00,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:00,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:45:00,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424501375] [2021-11-07 01:45:00,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:00,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:00,091 INFO L87 Difference]: Start difference. First operand 835 states and 1087 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:00,162 INFO L93 Difference]: Finished difference Result 835 states and 1087 transitions. [2021-11-07 01:45:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:00,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 01:45:00,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:00,169 INFO L225 Difference]: With dead ends: 835 [2021-11-07 01:45:00,169 INFO L226 Difference]: Without dead ends: 833 [2021-11-07 01:45:00,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-11-07 01:45:00,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 833. [2021-11-07 01:45:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 829 states have (on average 1.3088057901085646) internal successors, (1085), 832 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1085 transitions. [2021-11-07 01:45:00,243 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1085 transitions. Word has length 30 [2021-11-07 01:45:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:00,244 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1085 transitions. [2021-11-07 01:45:00,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:00,244 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1085 transitions. [2021-11-07 01:45:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:45:00,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:00,246 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] [2021-11-07 01:45:00,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:00,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:00,464 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:00,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1078029645, now seen corresponding path program 1 times [2021-11-07 01:45:00,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:00,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137570471] [2021-11-07 01:45:00,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:00,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:00,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:00,467 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:00,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:45:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:00,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:45:00,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:01,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:01,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:01,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137570471] [2021-11-07 01:45:01,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137570471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:01,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:01,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:45:01,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234024070] [2021-11-07 01:45:01,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:45:01,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:01,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:45:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:45:01,296 INFO L87 Difference]: Start difference. First operand 833 states and 1085 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:01,388 INFO L93 Difference]: Finished difference Result 833 states and 1085 transitions. [2021-11-07 01:45:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:01,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 01:45:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:01,395 INFO L225 Difference]: With dead ends: 833 [2021-11-07 01:45:01,396 INFO L226 Difference]: Without dead ends: 831 [2021-11-07 01:45:01,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:45:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-07 01:45:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 831. [2021-11-07 01:45:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 828 states have (on average 1.3079710144927537) internal successors, (1083), 830 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1083 transitions. [2021-11-07 01:45:01,486 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1083 transitions. Word has length 31 [2021-11-07 01:45:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:01,489 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1083 transitions. [2021-11-07 01:45:01,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1083 transitions. [2021-11-07 01:45:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:45:01,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:01,491 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] [2021-11-07 01:45:01,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:01,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:01,708 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash 940825924, now seen corresponding path program 1 times [2021-11-07 01:45:01,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:01,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230054951] [2021-11-07 01:45:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:01,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:01,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:01,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:01,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:45:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:02,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:45:02,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:02,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:02,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:02,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230054951] [2021-11-07 01:45:02,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230054951] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:02,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:02,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:45:02,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288093393] [2021-11-07 01:45:02,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:45:02,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:02,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:45:02,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:45:02,538 INFO L87 Difference]: Start difference. First operand 831 states and 1083 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:02,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:02,610 INFO L93 Difference]: Finished difference Result 831 states and 1083 transitions. [2021-11-07 01:45:02,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:02,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 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 32 [2021-11-07 01:45:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:02,615 INFO L225 Difference]: With dead ends: 831 [2021-11-07 01:45:02,616 INFO L226 Difference]: Without dead ends: 829 [2021-11-07 01:45:02,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:45:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-11-07 01:45:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2021-11-07 01:45:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.3071342200725513) internal successors, (1081), 828 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1081 transitions. [2021-11-07 01:45:02,686 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1081 transitions. Word has length 32 [2021-11-07 01:45:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:02,687 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1081 transitions. [2021-11-07 01:45:02,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1081 transitions. [2021-11-07 01:45:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:45:02,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:02,688 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] [2021-11-07 01:45:02,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:02,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:02,908 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:02,908 INFO L85 PathProgramCache]: Analyzing trace with hash -899160867, now seen corresponding path program 1 times [2021-11-07 01:45:02,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:02,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208086525] [2021-11-07 01:45:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:02,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:02,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:02,914 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:02,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:45:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:03,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:45:03,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:03,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:03,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:03,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208086525] [2021-11-07 01:45:03,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208086525] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:03,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:03,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:45:03,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799220938] [2021-11-07 01:45:03,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:45:03,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:03,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:45:03,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:45:03,750 INFO L87 Difference]: Start difference. First operand 829 states and 1081 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:03,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:03,843 INFO L93 Difference]: Finished difference Result 829 states and 1081 transitions. [2021-11-07 01:45:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:03,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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 33 [2021-11-07 01:45:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:03,852 INFO L225 Difference]: With dead ends: 829 [2021-11-07 01:45:03,853 INFO L226 Difference]: Without dead ends: 820 [2021-11-07 01:45:03,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:45:03,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-11-07 01:45:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 820. [2021-11-07 01:45:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 1.3064713064713065) internal successors, (1070), 819 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1070 transitions. [2021-11-07 01:45:03,921 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1070 transitions. Word has length 33 [2021-11-07 01:45:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:03,924 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1070 transitions. [2021-11-07 01:45:03,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1070 transitions. [2021-11-07 01:45:03,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:45:03,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:03,927 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:03,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:04,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:04,146 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1288304928, now seen corresponding path program 1 times [2021-11-07 01:45:04,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:04,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438356532] [2021-11-07 01:45:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:04,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:04,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:04,150 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:04,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:45:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:04,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:45:04,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:05,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:05,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:05,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438356532] [2021-11-07 01:45:05,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438356532] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:05,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:05,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:45:05,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256331333] [2021-11-07 01:45:05,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:45:05,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:05,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:45:05,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:45:05,371 INFO L87 Difference]: Start difference. First operand 820 states and 1070 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:05,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:05,534 INFO L93 Difference]: Finished difference Result 1717 states and 2255 transitions. [2021-11-07 01:45:05,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:05,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 86 [2021-11-07 01:45:05,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:05,541 INFO L225 Difference]: With dead ends: 1717 [2021-11-07 01:45:05,542 INFO L226 Difference]: Without dead ends: 904 [2021-11-07 01:45:05,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:45:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-11-07 01:45:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 883. [2021-11-07 01:45:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.3151927437641724) internal successors, (1160), 882 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1160 transitions. [2021-11-07 01:45:05,620 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1160 transitions. Word has length 86 [2021-11-07 01:45:05,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:05,621 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1160 transitions. [2021-11-07 01:45:05,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:05,621 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1160 transitions. [2021-11-07 01:45:05,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:45:05,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:05,624 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:05,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:05,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:05,848 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1355240599, now seen corresponding path program 1 times [2021-11-07 01:45:05,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:05,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956944546] [2021-11-07 01:45:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:05,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:05,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:05,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:05,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:45:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:06,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:45:06,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:06,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:07,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:07,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956944546] [2021-11-07 01:45:07,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956944546] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:07,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:07,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:45:07,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97379374] [2021-11-07 01:45:07,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:45:07,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:07,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:45:07,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:45:07,214 INFO L87 Difference]: Start difference. First operand 883 states and 1160 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:07,637 INFO L93 Difference]: Finished difference Result 2407 states and 3160 transitions. [2021-11-07 01:45:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:45:07,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 01:45:07,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:07,650 INFO L225 Difference]: With dead ends: 2407 [2021-11-07 01:45:07,650 INFO L226 Difference]: Without dead ends: 1519 [2021-11-07 01:45:07,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:45:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-11-07 01:45:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 883. [2021-11-07 01:45:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.308390022675737) internal successors, (1154), 882 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1154 transitions. [2021-11-07 01:45:07,758 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1154 transitions. Word has length 94 [2021-11-07 01:45:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:07,758 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1154 transitions. [2021-11-07 01:45:07,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1154 transitions. [2021-11-07 01:45:07,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:45:07,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:07,761 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:07,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:07,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:07,986 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:07,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:07,987 INFO L85 PathProgramCache]: Analyzing trace with hash -764148219, now seen corresponding path program 1 times [2021-11-07 01:45:07,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:07,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494827082] [2021-11-07 01:45:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:07,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:07,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:07,988 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:07,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:45:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:08,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:08,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:09,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:09,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:09,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494827082] [2021-11-07 01:45:09,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494827082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:09,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:09,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:45:09,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447064366] [2021-11-07 01:45:09,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:45:09,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:45:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:45:09,317 INFO L87 Difference]: Start difference. First operand 883 states and 1154 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:09,587 INFO L93 Difference]: Finished difference Result 2659 states and 3522 transitions. [2021-11-07 01:45:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:45:09,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 01:45:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:09,604 INFO L225 Difference]: With dead ends: 2659 [2021-11-07 01:45:09,604 INFO L226 Difference]: Without dead ends: 1783 [2021-11-07 01:45:09,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:45:09,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-11-07 01:45:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 901. [2021-11-07 01:45:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 1.3022222222222222) internal successors, (1172), 900 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1172 transitions. [2021-11-07 01:45:09,771 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1172 transitions. Word has length 96 [2021-11-07 01:45:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:09,773 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1172 transitions. [2021-11-07 01:45:09,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1172 transitions. [2021-11-07 01:45:09,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:45:09,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:09,783 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:09,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:09,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:09,998 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:09,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:09,999 INFO L85 PathProgramCache]: Analyzing trace with hash -369507124, now seen corresponding path program 1 times [2021-11-07 01:45:10,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:10,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325821470] [2021-11-07 01:45:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:10,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:10,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:10,002 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:10,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:45:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:10,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:45:10,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:11,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:11,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:11,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325821470] [2021-11-07 01:45:11,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325821470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:11,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:11,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-07 01:45:11,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508300929] [2021-11-07 01:45:11,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:45:11,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:45:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:45:11,809 INFO L87 Difference]: Start difference. First operand 901 states and 1172 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:12,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:12,577 INFO L93 Difference]: Finished difference Result 2824 states and 3677 transitions. [2021-11-07 01:45:12,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:45:12,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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 98 [2021-11-07 01:45:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:12,592 INFO L225 Difference]: With dead ends: 2824 [2021-11-07 01:45:12,592 INFO L226 Difference]: Without dead ends: 1930 [2021-11-07 01:45:12,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:45:12,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-11-07 01:45:12,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 901. [2021-11-07 01:45:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 1.2955555555555556) internal successors, (1166), 900 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1166 transitions. [2021-11-07 01:45:12,926 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1166 transitions. Word has length 98 [2021-11-07 01:45:12,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:12,927 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1166 transitions. [2021-11-07 01:45:12,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1166 transitions. [2021-11-07 01:45:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:45:12,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:12,930 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:12,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:13,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:13,150 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:13,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1248343951, now seen corresponding path program 1 times [2021-11-07 01:45:13,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:13,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705623089] [2021-11-07 01:45:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:13,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:13,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:13,156 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:13,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:45:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:14,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:45:14,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:14,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:15,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:15,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705623089] [2021-11-07 01:45:15,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705623089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:15,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:15,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:45:15,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034446003] [2021-11-07 01:45:15,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:45:15,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:15,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:45:15,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:45:15,233 INFO L87 Difference]: Start difference. First operand 901 states and 1166 transitions. Second operand has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:28,942 INFO L93 Difference]: Finished difference Result 4483 states and 5876 transitions. [2021-11-07 01:45:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:45:28,944 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 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 98 [2021-11-07 01:45:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:28,964 INFO L225 Difference]: With dead ends: 4483 [2021-11-07 01:45:28,964 INFO L226 Difference]: Without dead ends: 3589 [2021-11-07 01:45:28,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:45:28,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-11-07 01:45:29,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 979. [2021-11-07 01:45:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 1.278118609406953) internal successors, (1250), 978 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1250 transitions. [2021-11-07 01:45:29,149 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1250 transitions. Word has length 98 [2021-11-07 01:45:29,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:29,150 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 1250 transitions. [2021-11-07 01:45:29,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1250 transitions. [2021-11-07 01:45:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 01:45:29,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:29,153 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:29,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:29,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:29,367 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash 471320043, now seen corresponding path program 1 times [2021-11-07 01:45:29,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:29,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435707916] [2021-11-07 01:45:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:29,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:29,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:29,370 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:29,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:45:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:30,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:45:30,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:30,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:31,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:31,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435707916] [2021-11-07 01:45:31,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435707916] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:31,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:31,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-07 01:45:31,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528135756] [2021-11-07 01:45:31,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:45:31,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:31,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:45:31,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:45:31,107 INFO L87 Difference]: Start difference. First operand 979 states and 1250 transitions. Second operand has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:41,512 INFO L93 Difference]: Finished difference Result 3421 states and 4416 transitions. [2021-11-07 01:45:41,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:45:41,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 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 100 [2021-11-07 01:45:41,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:41,534 INFO L225 Difference]: With dead ends: 3421 [2021-11-07 01:45:41,535 INFO L226 Difference]: Without dead ends: 2449 [2021-11-07 01:45:41,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:45:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-11-07 01:45:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 979. [2021-11-07 01:45:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 1.278118609406953) internal successors, (1250), 978 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1250 transitions. [2021-11-07 01:45:41,717 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1250 transitions. Word has length 100 [2021-11-07 01:45:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:41,718 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 1250 transitions. [2021-11-07 01:45:41,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1250 transitions. [2021-11-07 01:45:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 01:45:41,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:41,721 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:41,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:41,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:41,936 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash -117528049, now seen corresponding path program 1 times [2021-11-07 01:45:41,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:41,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505074706] [2021-11-07 01:45:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:41,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:41,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:41,939 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:41,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:45:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:42,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:45:42,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:43,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:43,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:43,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505074706] [2021-11-07 01:45:43,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505074706] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:43,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:43,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-11-07 01:45:43,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687492743] [2021-11-07 01:45:43,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:45:43,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:43,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:45:43,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:45:43,585 INFO L87 Difference]: Start difference. First operand 979 states and 1250 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:44,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:44,494 INFO L93 Difference]: Finished difference Result 3547 states and 4554 transitions. [2021-11-07 01:45:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:45:44,497 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 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 102 [2021-11-07 01:45:44,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:44,511 INFO L225 Difference]: With dead ends: 3547 [2021-11-07 01:45:44,511 INFO L226 Difference]: Without dead ends: 2575 [2021-11-07 01:45:44,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:45:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-11-07 01:45:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 997. [2021-11-07 01:45:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.2730923694779117) internal successors, (1268), 996 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1268 transitions. [2021-11-07 01:45:44,724 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1268 transitions. Word has length 102 [2021-11-07 01:45:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:44,725 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1268 transitions. [2021-11-07 01:45:44,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1268 transitions. [2021-11-07 01:45:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:45:44,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:44,728 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:44,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:44,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:44,943 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:44,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1953912331, now seen corresponding path program 1 times [2021-11-07 01:45:44,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:44,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905105237] [2021-11-07 01:45:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:44,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:44,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:44,946 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:44,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:45:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:45,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:45:45,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:46,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:46,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:46,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905105237] [2021-11-07 01:45:46,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905105237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:46,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:46,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:45:46,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504997417] [2021-11-07 01:45:46,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:45:46,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:46,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:45:46,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:45:46,464 INFO L87 Difference]: Start difference. First operand 997 states and 1268 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:47,365 INFO L93 Difference]: Finished difference Result 4897 states and 6266 transitions. [2021-11-07 01:45:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:45:47,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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 104 [2021-11-07 01:45:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:47,387 INFO L225 Difference]: With dead ends: 4897 [2021-11-07 01:45:47,387 INFO L226 Difference]: Without dead ends: 3907 [2021-11-07 01:45:47,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:45:47,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-11-07 01:45:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 1021. [2021-11-07 01:45:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 1.272549019607843) internal successors, (1298), 1020 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1298 transitions. [2021-11-07 01:45:47,634 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1298 transitions. Word has length 104 [2021-11-07 01:45:47,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:47,635 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1298 transitions. [2021-11-07 01:45:47,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1298 transitions. [2021-11-07 01:45:47,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:45:47,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:47,638 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:47,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:47,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:47,852 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:47,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:47,852 INFO L85 PathProgramCache]: Analyzing trace with hash 231759783, now seen corresponding path program 1 times [2021-11-07 01:45:47,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:47,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677490202] [2021-11-07 01:45:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:47,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:47,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:47,854 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:47,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:45:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:48,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:45:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:49,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:45:50,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:50,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677490202] [2021-11-07 01:45:50,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677490202] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:50,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:50,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 11 [2021-11-07 01:45:50,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897042960] [2021-11-07 01:45:50,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:45:50,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:45:50,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:45:50,071 INFO L87 Difference]: Start difference. First operand 1021 states and 1298 transitions. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:59,044 INFO L93 Difference]: Finished difference Result 5329 states and 6870 transitions. [2021-11-07 01:45:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:45:59,046 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 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 106 [2021-11-07 01:45:59,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:59,072 INFO L225 Difference]: With dead ends: 5329 [2021-11-07 01:45:59,072 INFO L226 Difference]: Without dead ends: 4315 [2021-11-07 01:45:59,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 01:45:59,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2021-11-07 01:45:59,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 1018. [2021-11-07 01:45:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.264503441494592) internal successors, (1286), 1017 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:59,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1286 transitions. [2021-11-07 01:45:59,466 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1286 transitions. Word has length 106 [2021-11-07 01:45:59,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:59,467 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1286 transitions. [2021-11-07 01:45:59,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:59,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1286 transitions. [2021-11-07 01:45:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 01:45:59,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:59,471 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:59,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:59,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:59,696 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:45:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:59,697 INFO L85 PathProgramCache]: Analyzing trace with hash 724724784, now seen corresponding path program 1 times [2021-11-07 01:45:59,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:59,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979963853] [2021-11-07 01:45:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:59,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:59,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:59,699 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:59,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:46:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:01,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:01,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:02,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:02,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979963853] [2021-11-07 01:46:02,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979963853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:02,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:02,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:46:02,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123662455] [2021-11-07 01:46:02,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:02,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:02,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:02,017 INFO L87 Difference]: Start difference. First operand 1018 states and 1286 transitions. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:02,496 INFO L93 Difference]: Finished difference Result 3598 states and 4602 transitions. [2021-11-07 01:46:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:46:02,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 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 122 [2021-11-07 01:46:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:02,504 INFO L225 Difference]: With dead ends: 3598 [2021-11-07 01:46:02,505 INFO L226 Difference]: Without dead ends: 2587 [2021-11-07 01:46:02,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:46:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-11-07 01:46:02,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1411. [2021-11-07 01:46:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1410 states have (on average 1.2609929078014184) internal successors, (1778), 1410 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1778 transitions. [2021-11-07 01:46:02,786 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1778 transitions. Word has length 122 [2021-11-07 01:46:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:02,787 INFO L470 AbstractCegarLoop]: Abstraction has 1411 states and 1778 transitions. [2021-11-07 01:46:02,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1778 transitions. [2021-11-07 01:46:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 01:46:02,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:02,791 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:02,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:03,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:03,012 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:46:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash -964218958, now seen corresponding path program 1 times [2021-11-07 01:46:03,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:03,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389386458] [2021-11-07 01:46:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:03,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:03,014 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:03,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:46:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:04,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:46:04,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:04,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:04,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:04,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389386458] [2021-11-07 01:46:04,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389386458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:04,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:04,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:46:04,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290442825] [2021-11-07 01:46:04,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:46:04,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:04,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:46:04,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:46:04,808 INFO L87 Difference]: Start difference. First operand 1411 states and 1778 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:05,419 INFO L93 Difference]: Finished difference Result 4495 states and 5693 transitions. [2021-11-07 01:46:05,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:46:05,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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 122 [2021-11-07 01:46:05,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:05,425 INFO L225 Difference]: With dead ends: 4495 [2021-11-07 01:46:05,426 INFO L226 Difference]: Without dead ends: 3091 [2021-11-07 01:46:05,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:46:05,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-11-07 01:46:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 1423. [2021-11-07 01:46:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 1.258790436005626) internal successors, (1790), 1422 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 1790 transitions. [2021-11-07 01:46:05,713 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 1790 transitions. Word has length 122 [2021-11-07 01:46:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:05,714 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 1790 transitions. [2021-11-07 01:46:05,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 1790 transitions. [2021-11-07 01:46:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 01:46:05,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:05,718 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:05,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:05,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:05,932 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:46:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:05,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1665283536, now seen corresponding path program 1 times [2021-11-07 01:46:05,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:05,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703864257] [2021-11-07 01:46:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:05,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:05,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:05,934 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:05,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:46:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:07,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:46:07,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:08,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:08,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:08,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703864257] [2021-11-07 01:46:08,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703864257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:08,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1562869420] [2021-11-07 01:46:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:08,643 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:08,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:08,653 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:08,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:46:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:09,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:46:09,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:10,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:10,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1562869420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:10,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779490410] [2021-11-07 01:46:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:10,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:46:10,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:46:10,998 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:46:10,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 01:46:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:12,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:46:12,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:12,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:13,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779490410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:13,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:46:13,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-07 01:46:13,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784676068] [2021-11-07 01:46:13,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:13,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:13,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:13,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:13,276 INFO L87 Difference]: Start difference. First operand 1423 states and 1790 transitions. Second operand has 6 states, 6 states have (on average 38.666666666666664) internal successors, (232), 6 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:15,482 INFO L93 Difference]: Finished difference Result 8498 states and 10699 transitions. [2021-11-07 01:46:15,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 38.666666666666664) internal successors, (232), 6 states have internal predecessors, (232), 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 122 [2021-11-07 01:46:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:15,511 INFO L225 Difference]: With dead ends: 8498 [2021-11-07 01:46:15,512 INFO L226 Difference]: Without dead ends: 8493 [2021-11-07 01:46:15,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 722 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:46:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8493 states. [2021-11-07 01:46:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8493 to 8307. [2021-11-07 01:46:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8307 states, 8306 states have (on average 1.2622200818685287) internal successors, (10484), 8306 states have internal predecessors, (10484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8307 states to 8307 states and 10484 transitions. [2021-11-07 01:46:17,583 INFO L78 Accepts]: Start accepts. Automaton has 8307 states and 10484 transitions. Word has length 122 [2021-11-07 01:46:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:17,584 INFO L470 AbstractCegarLoop]: Abstraction has 8307 states and 10484 transitions. [2021-11-07 01:46:17,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.666666666666664) internal successors, (232), 6 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 8307 states and 10484 transitions. [2021-11-07 01:46:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 01:46:17,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:17,602 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:17,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:17,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 01:46:18,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:18,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:46:18,214 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:46:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:18,215 INFO L85 PathProgramCache]: Analyzing trace with hash -627310470, now seen corresponding path program 1 times [2021-11-07 01:46:18,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:18,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697530177] [2021-11-07 01:46:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:18,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:18,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:18,217 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:18,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eaf0e9b-7b67-4bc0-9758-24ced9746f62/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:46:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:21,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-07 01:46:21,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:22,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:46:22,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-07 01:46:22,333 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:46:22,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 47 [2021-11-07 01:46:22,357 INFO L354 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2021-11-07 01:46:22,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2021-11-07 01:46:23,406 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-07 01:46:23,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 62 [2021-11-07 01:46:24,647 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-07 01:46:24,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 79 [2021-11-07 01:46:27,032 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-11-07 01:46:27,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 98 treesize of output 102 [2021-11-07 01:46:52,072 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-07 01:46:52,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 47 [2021-11-07 01:46:52,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-07 01:46:53,061 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-07 01:46:53,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 47 [2021-11-07 01:46:53,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-07 01:46:53,161 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:46:53,163 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-07 01:46:53,242 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-07 01:46:53,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 60 [2021-11-07 01:46:53,283 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-07 01:46:53,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2021-11-07 01:46:55,862 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:46:55,863 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3779 [2021-11-07 01:46:55,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:46:55,870 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4139