./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/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_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:35:52,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:35:52,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:35:52,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:35:52,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:35:52,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:35:52,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:35:52,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:35:52,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:35:52,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:35:52,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:35:52,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:35:52,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:35:52,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:35:52,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:35:52,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:35:52,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:35:52,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:35:52,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:35:52,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:35:52,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:35:52,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:35:52,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:35:52,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:35:52,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:35:52,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:35:52,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:35:52,271 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:35:52,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:35:52,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:35:52,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:35:52,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:35:52,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:35:52,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:35:52,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:35:52,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:35:52,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:35:52,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:35:52,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:35:52,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:35:52,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:35:52,282 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:35:52,330 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:35:52,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:35:52,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:35:52,332 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:35:52,332 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:35:52,333 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:35:52,333 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:35:52,333 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:35:52,333 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:35:52,333 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:35:52,334 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:35:52,335 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:35:52,335 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:35:52,335 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:35:52,336 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:35:52,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:35:52,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:35:52,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:35:52,337 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:35:52,337 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:35:52,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:35:52,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:35:52,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:35:52,338 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:35:52,338 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:35:52,338 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:35:52,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:35:52,340 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:35:52,340 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:35:52,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:35:52,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:35:52,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:35:52,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:35:52,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:35:52,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:35:52,342 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:35:52,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:35:52,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:35:52,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:35:52,343 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_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 [2021-11-07 01:35:52,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:35:52,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:35:52,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:35:52,623 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:35:52,626 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:35:52,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2021-11-07 01:35:52,716 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/data/b28f37931/c9087a3a399f46af877c6831bc7f4943/FLAG0a5abf73f [2021-11-07 01:35:53,313 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:35:53,314 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2021-11-07 01:35:53,339 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/data/b28f37931/c9087a3a399f46af877c6831bc7f4943/FLAG0a5abf73f [2021-11-07 01:35:53,568 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/data/b28f37931/c9087a3a399f46af877c6831bc7f4943 [2021-11-07 01:35:53,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:35:53,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:35:53,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:53,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:35:53,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:35:53,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:53" (1/1) ... [2021-11-07 01:35:53,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eab0919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:53, skipping insertion in model container [2021-11-07 01:35:53,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:53" (1/1) ... [2021-11-07 01:35:53,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:35:53,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:35:54,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:54,155 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 01:35:54,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7fa3f248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:54, skipping insertion in model container [2021-11-07 01:35:54,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:54,156 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:35:54,160 INFO L168 Benchmark]: Toolchain (without parser) took 585.31 ms. Allocated memory is still 96.5 MB. Free memory was 52.9 MB in the beginning and 65.5 MB in the end (delta: -12.7 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:35:54,161 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory is still 71.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:35:54,162 INFO L168 Benchmark]: CACSL2BoogieTranslator took 574.14 ms. Allocated memory is still 96.5 MB. Free memory was 52.6 MB in the beginning and 65.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:35:54,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory is still 71.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 574.14 ms. Allocated memory is still 96.5 MB. Free memory was 52.6 MB in the beginning and 65.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/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_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:35:56,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:35:56,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:35:56,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:35:56,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:35:56,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:35:56,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:35:56,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:35:56,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:35:56,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:35:56,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:35:56,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:35:56,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:35:56,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:35:56,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:35:56,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:35:56,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:35:56,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:35:56,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:35:56,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:35:56,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:35:56,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:35:56,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:35:56,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:35:56,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:35:56,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:35:56,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:35:56,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:35:56,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:35:56,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:35:56,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:35:56,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:35:56,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:35:56,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:35:56,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:35:56,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:35:56,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:35:56,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:35:56,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:35:56,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:35:56,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:35:56,497 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 01:35:56,540 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:35:56,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:35:56,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:35:56,542 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:35:56,542 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:35:56,542 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:35:56,543 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:35:56,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:35:56,543 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:35:56,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:35:56,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:35:56,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:35:56,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:35:56,546 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:35:56,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:35:56,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:35:56,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:35:56,547 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:35:56,548 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:35:56,548 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:35:56,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:35:56,548 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:35:56,548 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:35:56,549 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:35:56,549 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:35:56,549 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:35:56,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:35:56,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:35:56,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:35:56,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:35:56,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:35:56,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:35:56,551 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:35:56,552 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:56,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:35:56,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:35:56,552 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_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 [2021-11-07 01:35:56,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:35:57,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:35:57,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:35:57,009 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:35:57,010 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:35:57,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2021-11-07 01:35:57,079 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/data/333ae441a/25312bcdaa0d4eb2911e8162ae0e53d3/FLAG70e1757d1 [2021-11-07 01:35:57,715 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:35:57,716 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2021-11-07 01:35:57,732 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/data/333ae441a/25312bcdaa0d4eb2911e8162ae0e53d3/FLAG70e1757d1 [2021-11-07 01:35:57,955 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/data/333ae441a/25312bcdaa0d4eb2911e8162ae0e53d3 [2021-11-07 01:35:57,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:35:57,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:35:57,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:57,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:35:57,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:35:57,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:57" (1/1) ... [2021-11-07 01:35:57,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@660ca27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:57, skipping insertion in model container [2021-11-07 01:35:57,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:57" (1/1) ... [2021-11-07 01:35:57,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:35:58,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:35:58,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:58,544 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:35:58,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:35:58,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:58,663 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:35:58,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:58,812 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:35:58,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:58 WrapperNode [2021-11-07 01:35:58,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:58,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:35:58,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:35:58,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:35:58,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:58" (1/1) ... [2021-11-07 01:35:58,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:58" (1/1) ... [2021-11-07 01:35:58,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:35:58,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:35:58,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:35:58,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:35:58,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:58" (1/1) ... [2021-11-07 01:35:58,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:58" (1/1) ... [2021-11-07 01:35:58,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:58" (1/1) ... [2021-11-07 01:35:58,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:58" (1/1) ... [2021-11-07 01:35:58,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:58" (1/1) ... [2021-11-07 01:35:58,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:58" (1/1) ... [2021-11-07 01:35:58,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:58" (1/1) ... [2021-11-07 01:35:58,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:35:58,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:35:58,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:35:58,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:35:58,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:58" (1/1) ... [2021-11-07 01:35:58,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:35:58,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:35:58,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:35:58,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:35:59,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:35:59,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:35:59,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:35:59,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:35:59,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:35:59,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:35:59,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:35:59,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:35:59,633 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:35:59,634 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-11-07 01:35:59,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:35:59 BoogieIcfgContainer [2021-11-07 01:35:59,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:35:59,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:35:59,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:35:59,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:35:59,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:35:57" (1/3) ... [2021-11-07 01:35:59,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a557a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:35:59, skipping insertion in model container [2021-11-07 01:35:59,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:58" (2/3) ... [2021-11-07 01:35:59,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a557a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:35:59, skipping insertion in model container [2021-11-07 01:35:59,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:35:59" (3/3) ... [2021-11-07 01:35:59,643 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test14_2.i [2021-11-07 01:35:59,648 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:35:59,648 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-11-07 01:35:59,690 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:35:59,696 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 01:35:59,696 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-11-07 01:35:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 55 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 01:35:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:35:59,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:59,716 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:35:59,717 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:35:59,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:59,722 INFO L85 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2021-11-07 01:35:59,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:59,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765434975] [2021-11-07 01:35:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:59,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:59,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:59,738 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:59,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:35:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:59,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:35:59,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:59,942 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 01:35:59,996 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:35:59,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 21 [2021-11-07 01:36:00,068 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 01:36:00,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:00,133 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 01:36:00,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:00,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765434975] [2021-11-07 01:36:00,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765434975] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:00,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:00,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:36:00,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539310249] [2021-11-07 01:36:00,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:36:00,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:00,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:36:00,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:00,162 INFO L87 Difference]: Start difference. First operand has 56 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 55 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) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 01:36:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:00,396 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2021-11-07 01:36:00,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:00,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-07 01:36:00,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:00,408 INFO L225 Difference]: With dead ends: 85 [2021-11-07 01:36:00,409 INFO L226 Difference]: Without dead ends: 83 [2021-11-07 01:36:00,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 2 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 01:36:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-07 01:36:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2021-11-07 01:36:00,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.896551724137931) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:36:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-11-07 01:36:00,450 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 6 [2021-11-07 01:36:00,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:00,451 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-11-07 01:36:00,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 01:36:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-11-07 01:36:00,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:36:00,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:00,453 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:36:00,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:00,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:00,667 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:00,668 INFO L85 PathProgramCache]: Analyzing trace with hash 889508714, now seen corresponding path program 1 times [2021-11-07 01:36:00,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:00,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858249206] [2021-11-07 01:36:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:00,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:00,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:00,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:00,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:36:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:00,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:36:00,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:00,804 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 01:36:00,811 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 01:36:00,876 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:36:00,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 31 [2021-11-07 01:36:00,894 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:36:00,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-07 01:36:00,968 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 01:36:00,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:02,131 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 01:36:02,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:02,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858249206] [2021-11-07 01:36:02,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858249206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:02,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:02,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:36:02,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091321719] [2021-11-07 01:36:02,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:36:02,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:02,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:36:02,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:36:02,142 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 01:36:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:02,673 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-11-07 01:36:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:36:02,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 6 [2021-11-07 01:36:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:02,676 INFO L225 Difference]: With dead ends: 84 [2021-11-07 01:36:02,676 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 01:36:02,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:36:02,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 01:36:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 52. [2021-11-07 01:36:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:36:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-11-07 01:36:02,683 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 6 [2021-11-07 01:36:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:02,684 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-11-07 01:36:02,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 01:36:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-11-07 01:36:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:36:02,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:02,685 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:02,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:02,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:02,888 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:02,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1804987196, now seen corresponding path program 1 times [2021-11-07 01:36:02,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:02,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860002765] [2021-11-07 01:36:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:02,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:02,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:02,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:02,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:36:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:02,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:36:02,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:03,006 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 01:36:03,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:03,037 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 01:36:03,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:03,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860002765] [2021-11-07 01:36:03,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860002765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:03,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:03,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:36:03,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372684479] [2021-11-07 01:36:03,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:36:03,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:36:03,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:03,041 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 01:36:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:03,073 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2021-11-07 01:36:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:03,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-07 01:36:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:03,075 INFO L225 Difference]: With dead ends: 101 [2021-11-07 01:36:03,076 INFO L226 Difference]: Without dead ends: 101 [2021-11-07 01:36:03,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 01:36:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-07 01:36:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 54. [2021-11-07 01:36:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 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 01:36:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-11-07 01:36:03,084 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 7 [2021-11-07 01:36:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:03,085 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-11-07 01:36:03,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 01:36:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-11-07 01:36:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:36:03,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:03,086 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:03,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:03,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:03,298 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:03,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1806834238, now seen corresponding path program 1 times [2021-11-07 01:36:03,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:03,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451010816] [2021-11-07 01:36:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:03,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:03,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:03,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:03,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:36:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:03,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:36:03,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:03,394 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 01:36:03,428 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 01:36:03,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:03,467 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 01:36:03,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:03,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451010816] [2021-11-07 01:36:03,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451010816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:03,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:03,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:36:03,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045830206] [2021-11-07 01:36:03,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:36:03,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:03,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:36:03,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:03,469 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 01:36:03,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:03,589 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-11-07 01:36:03,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:03,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-07 01:36:03,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:03,591 INFO L225 Difference]: With dead ends: 53 [2021-11-07 01:36:03,591 INFO L226 Difference]: Without dead ends: 53 [2021-11-07 01:36:03,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 01:36:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-07 01:36:03,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-07 01:36:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:36:03,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-11-07 01:36:03,597 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 7 [2021-11-07 01:36:03,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:03,597 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-11-07 01:36:03,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 01:36:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-11-07 01:36:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:36:03,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:03,598 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:03,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:03,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:03,807 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:03,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1806834239, now seen corresponding path program 1 times [2021-11-07 01:36:03,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:03,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605607477] [2021-11-07 01:36:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:03,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:03,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:03,810 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:03,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:36:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:03,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:36:03,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:03,913 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 01:36:03,982 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 01:36:03,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:04,173 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 01:36:04,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:04,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605607477] [2021-11-07 01:36:04,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605607477] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:04,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:04,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:36:04,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544686852] [2021-11-07 01:36:04,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:36:04,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:04,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:36:04,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:36:04,176 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 01:36:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:04,776 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-11-07 01:36:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:36:04,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 7 [2021-11-07 01:36:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:04,778 INFO L225 Difference]: With dead ends: 98 [2021-11-07 01:36:04,778 INFO L226 Difference]: Without dead ends: 98 [2021-11-07 01:36:04,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 01:36:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-07 01:36:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2021-11-07 01:36:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.8) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 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 01:36:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-07 01:36:04,790 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 7 [2021-11-07 01:36:04,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:04,790 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-07 01:36:04,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 01:36:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-07 01:36:04,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:36:04,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:04,790 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:04,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:04,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:04,991 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash 119380842, now seen corresponding path program 1 times [2021-11-07 01:36:04,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:04,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181931622] [2021-11-07 01:36:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:04,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:04,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:04,994 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:04,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:36:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:05,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:36:05,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:05,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-07 01:36:05,192 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 01:36:05,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:05,252 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-07 01:36:05,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-07 01:36:05,289 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 01:36:05,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:05,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181931622] [2021-11-07 01:36:05,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181931622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:05,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:05,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:36:05,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236509205] [2021-11-07 01:36:05,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:36:05,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:36:05,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:36:05,291 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 01:36:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:05,668 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2021-11-07 01:36:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:36:05,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-07 01:36:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:05,670 INFO L225 Difference]: With dead ends: 103 [2021-11-07 01:36:05,670 INFO L226 Difference]: Without dead ends: 103 [2021-11-07 01:36:05,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:36:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-07 01:36:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2021-11-07 01:36:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.75) internal successors, (70), 60 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-11-07 01:36:05,677 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 8 [2021-11-07 01:36:05,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:05,677 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-11-07 01:36:05,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 01:36:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-11-07 01:36:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:36:05,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:05,678 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:05,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:05,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:05,890 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:05,890 INFO L85 PathProgramCache]: Analyzing trace with hash 119380843, now seen corresponding path program 1 times [2021-11-07 01:36:05,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:05,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111679204] [2021-11-07 01:36:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:05,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:05,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:05,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:05,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:36:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:05,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:36:06,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:06,029 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 01:36:06,039 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 01:36:06,113 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:36:06,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 31 [2021-11-07 01:36:06,126 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:36:06,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-07 01:36:06,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-11-07 01:36:06,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-07 01:36:06,308 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 01:36:06,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:06,921 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 01:36:06,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:06,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111679204] [2021-11-07 01:36:06,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111679204] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:06,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:06,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 01:36:06,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982577178] [2021-11-07 01:36:06,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:36:06,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:06,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:36:06,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:36:06,924 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 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 01:36:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:08,109 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2021-11-07 01:36:08,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:36:08,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 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 8 [2021-11-07 01:36:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:08,111 INFO L225 Difference]: With dead ends: 104 [2021-11-07 01:36:08,111 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 01:36:08,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:36:08,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 01:36:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 60. [2021-11-07 01:36:08,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.7) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 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 01:36:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-11-07 01:36:08,117 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 8 [2021-11-07 01:36:08,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:08,119 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-11-07 01:36:08,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 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 01:36:08,119 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-11-07 01:36:08,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:36:08,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:08,120 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:08,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:08,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:08,323 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:08,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:08,323 INFO L85 PathProgramCache]: Analyzing trace with hash -594161204, now seen corresponding path program 1 times [2021-11-07 01:36:08,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:08,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34583553] [2021-11-07 01:36:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:08,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:08,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:08,324 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:08,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:36:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:08,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:36:08,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:08,448 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 01:36:08,516 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 01:36:08,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:08,571 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 01:36:08,571 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:08,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34583553] [2021-11-07 01:36:08,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34583553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:08,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:08,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:36:08,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669164267] [2021-11-07 01:36:08,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:36:08,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:08,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:36:08,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:36:08,573 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 01:36:08,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:08,934 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2021-11-07 01:36:08,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:36:08,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-07 01:36:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:08,936 INFO L225 Difference]: With dead ends: 117 [2021-11-07 01:36:08,936 INFO L226 Difference]: Without dead ends: 117 [2021-11-07 01:36:08,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:36:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-07 01:36:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 59. [2021-11-07 01:36:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.625) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:36:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-11-07 01:36:08,941 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 9 [2021-11-07 01:36:08,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:08,941 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-11-07 01:36:08,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 01:36:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-11-07 01:36:08,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:36:08,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:08,942 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:08,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:09,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:09,143 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:09,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:09,143 INFO L85 PathProgramCache]: Analyzing trace with hash -594161203, now seen corresponding path program 1 times [2021-11-07 01:36:09,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:09,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538822127] [2021-11-07 01:36:09,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:09,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:09,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:09,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:09,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:36:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:36:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:09,288 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 01:36:09,403 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 01:36:09,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:09,781 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 01:36:09,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:09,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538822127] [2021-11-07 01:36:09,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538822127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:09,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:09,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 01:36:09,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577393440] [2021-11-07 01:36:09,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:36:09,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:09,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:36:09,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:36:09,784 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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 01:36:10,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:10,891 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2021-11-07 01:36:10,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:36:10,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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 9 [2021-11-07 01:36:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:10,892 INFO L225 Difference]: With dead ends: 119 [2021-11-07 01:36:10,892 INFO L226 Difference]: Without dead ends: 119 [2021-11-07 01:36:10,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:36:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-07 01:36:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 59. [2021-11-07 01:36:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.575) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 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 01:36:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-11-07 01:36:10,897 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 9 [2021-11-07 01:36:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:10,897 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-11-07 01:36:10,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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 01:36:10,898 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-11-07 01:36:10,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:36:10,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:10,898 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:10,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:11,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:11,109 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:11,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1200915423, now seen corresponding path program 1 times [2021-11-07 01:36:11,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:11,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303624909] [2021-11-07 01:36:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:11,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:11,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:11,111 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:11,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:36:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:11,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:36:11,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:11,237 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 01:36:11,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-07 01:36:11,352 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 01:36:11,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:11,449 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 01:36:11,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:11,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303624909] [2021-11-07 01:36:11,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303624909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:11,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:11,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 01:36:11,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494714607] [2021-11-07 01:36:11,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:36:11,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:11,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:36:11,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:36:11,452 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 01:36:11,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:11,831 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-11-07 01:36:11,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:36:11,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 9 [2021-11-07 01:36:11,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:11,832 INFO L225 Difference]: With dead ends: 94 [2021-11-07 01:36:11,833 INFO L226 Difference]: Without dead ends: 94 [2021-11-07 01:36:11,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:36:11,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-07 01:36:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-11-07 01:36:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 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 01:36:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-11-07 01:36:11,837 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 9 [2021-11-07 01:36:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:11,837 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-11-07 01:36:11,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 01:36:11,837 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-11-07 01:36:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:36:11,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:11,838 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:11,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:12,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:12,038 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:12,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1200915424, now seen corresponding path program 1 times [2021-11-07 01:36:12,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:12,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642107904] [2021-11-07 01:36:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:12,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:12,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:12,040 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:12,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:36:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:12,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:36:12,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:12,179 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 01:36:12,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-11-07 01:36:12,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-07 01:36:12,386 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 01:36:12,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:12,717 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 01:36:12,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:12,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642107904] [2021-11-07 01:36:12,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642107904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:12,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:12,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:36:12,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186782023] [2021-11-07 01:36:12,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:36:12,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:12,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:36:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:36:12,720 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 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 01:36:13,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:13,614 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2021-11-07 01:36:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:36:13,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 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 9 [2021-11-07 01:36:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:13,616 INFO L225 Difference]: With dead ends: 102 [2021-11-07 01:36:13,616 INFO L226 Difference]: Without dead ends: 102 [2021-11-07 01:36:13,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:36:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-07 01:36:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 63. [2021-11-07 01:36:13,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 62 states have internal predecessors, (67), 0 states have call successors, (0), 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 01:36:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2021-11-07 01:36:13,620 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 9 [2021-11-07 01:36:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:13,620 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2021-11-07 01:36:13,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 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 01:36:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2021-11-07 01:36:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:36:13,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:13,621 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:13,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:36:13,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:13,832 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:13,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1180846158, now seen corresponding path program 1 times [2021-11-07 01:36:13,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:13,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238845599] [2021-11-07 01:36:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:13,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:13,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:13,834 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:13,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:36:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:13,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:36:13,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:14,026 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 01:36:14,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:14,056 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 01:36:14,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:14,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238845599] [2021-11-07 01:36:14,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238845599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:14,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:14,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:36:14,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579618913] [2021-11-07 01:36:14,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:36:14,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:36:14,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:14,059 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 01:36:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:14,085 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-11-07 01:36:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:14,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-07 01:36:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:14,086 INFO L225 Difference]: With dead ends: 75 [2021-11-07 01:36:14,086 INFO L226 Difference]: Without dead ends: 75 [2021-11-07 01:36:14,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 01:36:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-07 01:36:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 51. [2021-11-07 01:36:14,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 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 01:36:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-11-07 01:36:14,089 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 9 [2021-11-07 01:36:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:14,090 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-11-07 01:36:14,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 01:36:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-11-07 01:36:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:36:14,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:14,095 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:14,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:14,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:14,305 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:14,305 INFO L85 PathProgramCache]: Analyzing trace with hash 241733103, now seen corresponding path program 1 times [2021-11-07 01:36:14,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:14,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040414691] [2021-11-07 01:36:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:14,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:14,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:14,307 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:14,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:36:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:14,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:36:14,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:14,496 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 01:36:14,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:14,530 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 01:36:14,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:14,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040414691] [2021-11-07 01:36:14,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040414691] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:14,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:14,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:36:14,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578772813] [2021-11-07 01:36:14,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:36:14,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:36:14,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:14,544 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 01:36:14,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:14,681 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-11-07 01:36:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:14,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-07 01:36:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:14,682 INFO L225 Difference]: With dead ends: 72 [2021-11-07 01:36:14,682 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 01:36:14,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 1 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 01:36:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 01:36:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2021-11-07 01:36:14,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.457142857142857) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-11-07 01:36:14,685 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 11 [2021-11-07 01:36:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:14,686 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-11-07 01:36:14,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 01:36:14,686 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-11-07 01:36:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:36:14,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:14,687 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:14,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:14,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:14,895 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:14,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:14,895 INFO L85 PathProgramCache]: Analyzing trace with hash 241733104, now seen corresponding path program 1 times [2021-11-07 01:36:14,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:14,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728785811] [2021-11-07 01:36:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:14,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:14,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:14,897 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:14,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:36:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:15,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:36:15,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:15,130 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 01:36:15,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:15,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-07 01:36:15,398 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 01:36:15,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:15,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728785811] [2021-11-07 01:36:15,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728785811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:15,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:15,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:36:15,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791175901] [2021-11-07 01:36:15,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:36:15,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:15,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:36:15,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:36:15,400 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 01:36:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:15,816 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-11-07 01:36:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:36:15,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 11 [2021-11-07 01:36:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:15,817 INFO L225 Difference]: With dead ends: 73 [2021-11-07 01:36:15,818 INFO L226 Difference]: Without dead ends: 73 [2021-11-07 01:36:15,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:36:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-07 01:36:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2021-11-07 01:36:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 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 01:36:15,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-07 01:36:15,820 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 11 [2021-11-07 01:36:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:15,820 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-07 01:36:15,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 01:36:15,821 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-07 01:36:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:36:15,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:15,821 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:15,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:16,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:16,022 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:16,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash -606195921, now seen corresponding path program 1 times [2021-11-07 01:36:16,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:16,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191722975] [2021-11-07 01:36:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:16,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:16,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:16,024 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:16,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:36:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:16,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:36:16,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:16,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:36:16,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2021-11-07 01:36:16,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:36:16,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2021-11-07 01:36:16,407 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 01:36:16,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:16,603 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 01:36:16,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:16,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191722975] [2021-11-07 01:36:16,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191722975] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:16,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:16,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 01:36:16,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750313190] [2021-11-07 01:36:16,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:36:16,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:16,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:36:16,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:36:16,606 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 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 01:36:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:16,975 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-11-07 01:36:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:36:16,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 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 12 [2021-11-07 01:36:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:16,977 INFO L225 Difference]: With dead ends: 54 [2021-11-07 01:36:16,977 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 01:36:16,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:36:16,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 01:36:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-11-07 01:36:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 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 01:36:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-11-07 01:36:16,979 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 12 [2021-11-07 01:36:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:16,980 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-11-07 01:36:16,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 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 01:36:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-11-07 01:36:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:36:16,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:16,981 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:16,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:17,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:17,187 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:17,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:17,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1612205465, now seen corresponding path program 1 times [2021-11-07 01:36:17,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:17,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435058914] [2021-11-07 01:36:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:17,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:17,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:17,189 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:17,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:36:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:17,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:36:17,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:17,466 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 01:36:17,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:17,533 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 01:36:17,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:17,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435058914] [2021-11-07 01:36:17,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435058914] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:17,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:17,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:36:17,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416841125] [2021-11-07 01:36:17,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:36:17,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:17,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:36:17,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:36:17,536 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 01:36:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:17,664 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-11-07 01:36:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:17,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2021-11-07 01:36:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:17,665 INFO L225 Difference]: With dead ends: 53 [2021-11-07 01:36:17,666 INFO L226 Difference]: Without dead ends: 43 [2021-11-07 01:36:17,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:36:17,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-07 01:36:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-07 01:36:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 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 01:36:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-11-07 01:36:17,668 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 13 [2021-11-07 01:36:17,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:17,668 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-11-07 01:36:17,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 01:36:17,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-11-07 01:36:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:36:17,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:17,669 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:17,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:17,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:17,869 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:17,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:17,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1189283757, now seen corresponding path program 1 times [2021-11-07 01:36:17,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:17,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802905877] [2021-11-07 01:36:17,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:17,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:17,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:17,871 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:17,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:36:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:18,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:36:18,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:18,275 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 01:36:18,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:18,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:36:18,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-07 01:36:18,771 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 01:36:18,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:18,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802905877] [2021-11-07 01:36:18,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802905877] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:18,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:18,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:36:18,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464590233] [2021-11-07 01:36:18,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:36:18,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:18,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:36:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:36:18,773 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 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 01:36:19,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:19,064 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-11-07 01:36:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:36:19,065 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2021-11-07 01:36:19,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:19,066 INFO L225 Difference]: With dead ends: 42 [2021-11-07 01:36:19,066 INFO L226 Difference]: Without dead ends: 42 [2021-11-07 01:36:19,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:36:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-07 01:36:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-07 01:36:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 41 states have internal predecessors, (42), 0 states have call successors, (0), 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 01:36:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-11-07 01:36:19,068 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 14 [2021-11-07 01:36:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:19,069 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-11-07 01:36:19,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 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 01:36:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-11-07 01:36:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:36:19,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:19,069 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:19,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:19,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:19,270 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:19,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:19,270 INFO L85 PathProgramCache]: Analyzing trace with hash -440390413, now seen corresponding path program 1 times [2021-11-07 01:36:19,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:19,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418724263] [2021-11-07 01:36:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:19,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:19,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:19,271 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:19,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:36:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:19,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 01:36:19,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:19,571 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 01:36:19,790 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 25 treesize of output 21 [2021-11-07 01:36:19,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-07 01:36:19,894 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 01:36:19,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:19,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-11-07 01:36:20,414 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 01:36:20,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:20,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418724263] [2021-11-07 01:36:20,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418724263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:20,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:20,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 14 [2021-11-07 01:36:20,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668357508] [2021-11-07 01:36:20,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 01:36:20,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:20,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 01:36:20,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:36:20,416 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 01:36:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:21,319 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-11-07 01:36:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:36:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 16 [2021-11-07 01:36:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:21,320 INFO L225 Difference]: With dead ends: 58 [2021-11-07 01:36:21,320 INFO L226 Difference]: Without dead ends: 58 [2021-11-07 01:36:21,321 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:36:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-07 01:36:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2021-11-07 01:36:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 40 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-11-07 01:36:21,323 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 16 [2021-11-07 01:36:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:21,323 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-11-07 01:36:21,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 01:36:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-11-07 01:36:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:36:21,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:21,324 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:21,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:21,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:21,531 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:21,531 INFO L85 PathProgramCache]: Analyzing trace with hash -440390412, now seen corresponding path program 1 times [2021-11-07 01:36:21,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:21,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141959330] [2021-11-07 01:36:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:21,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:21,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:21,533 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:21,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:36:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:21,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 01:36:21,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:21,839 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 01:36:22,075 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 17 treesize of output 13 [2021-11-07 01:36:22,080 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 11 treesize of output 7 [2021-11-07 01:36:22,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 01:36:22,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-07 01:36:22,243 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 01:36:22,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:22,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-11-07 01:36:22,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2021-11-07 01:36:22,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-07 01:36:23,744 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 01:36:23,744 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:23,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141959330] [2021-11-07 01:36:23,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141959330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:23,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:23,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 19 [2021-11-07 01:36:23,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777339364] [2021-11-07 01:36:23,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:36:23,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:23,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:36:23,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:36:23,746 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 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 01:36:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:25,385 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-11-07 01:36:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:36:25,387 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 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 16 [2021-11-07 01:36:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:25,387 INFO L225 Difference]: With dead ends: 59 [2021-11-07 01:36:25,388 INFO L226 Difference]: Without dead ends: 59 [2021-11-07 01:36:25,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:36:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-07 01:36:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 40. [2021-11-07 01:36:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 39 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-11-07 01:36:25,390 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 16 [2021-11-07 01:36:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:25,391 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-11-07 01:36:25,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 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 01:36:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-11-07 01:36:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:36:25,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:25,392 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:25,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:25,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:25,604 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:25,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:25,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1454308763, now seen corresponding path program 1 times [2021-11-07 01:36:25,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:25,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637453496] [2021-11-07 01:36:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:25,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:25,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:25,606 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:25,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:36:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:25,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 01:36:25,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:25,949 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 01:36:26,157 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 25 treesize of output 21 [2021-11-07 01:36:26,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-07 01:36:26,299 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 01:36:26,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:26,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-11-07 01:36:26,857 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 01:36:26,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:26,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637453496] [2021-11-07 01:36:26,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637453496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:26,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:26,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 15 [2021-11-07 01:36:26,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252521529] [2021-11-07 01:36:26,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:36:26,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:26,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:36:26,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:36:26,860 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:28,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:28,007 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-11-07 01:36:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:36:28,008 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 01:36:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:28,008 INFO L225 Difference]: With dead ends: 54 [2021-11-07 01:36:28,008 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 01:36:28,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:36:28,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 01:36:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2021-11-07 01:36:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 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 01:36:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-11-07 01:36:28,010 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 19 [2021-11-07 01:36:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:28,010 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-11-07 01:36:28,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-11-07 01:36:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:36:28,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:28,012 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:28,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:28,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:28,219 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:28,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:28,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1454308764, now seen corresponding path program 1 times [2021-11-07 01:36:28,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:28,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87047875] [2021-11-07 01:36:28,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:28,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:28,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:28,220 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:28,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:36:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 01:36:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:28,562 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 01:36:28,838 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 17 treesize of output 13 [2021-11-07 01:36:28,846 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 11 treesize of output 7 [2021-11-07 01:36:28,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 01:36:28,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-07 01:36:29,079 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 01:36:29,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:29,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-11-07 01:36:29,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2021-11-07 01:36:29,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-11-07 01:36:30,669 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 01:36:30,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:30,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87047875] [2021-11-07 01:36:30,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87047875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:30,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:30,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 21 [2021-11-07 01:36:30,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044593369] [2021-11-07 01:36:30,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 01:36:30,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:30,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 01:36:30,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:36:30,671 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 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 01:36:32,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:32,880 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-11-07 01:36:32,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:36:32,881 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 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 19 [2021-11-07 01:36:32,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:32,882 INFO L225 Difference]: With dead ends: 62 [2021-11-07 01:36:32,882 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 01:36:32,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:36:32,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 01:36:32,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2021-11-07 01:36:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.34375) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 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 01:36:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-07 01:36:32,889 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 19 [2021-11-07 01:36:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:32,889 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-07 01:36:32,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 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 01:36:32,890 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-07 01:36:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:36:32,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:32,893 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] [2021-11-07 01:36:32,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:33,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:33,104 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2133897595, now seen corresponding path program 1 times [2021-11-07 01:36:33,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:33,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730464136] [2021-11-07 01:36:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:33,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:33,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:33,106 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:33,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:36:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:33,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 01:36:33,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:33,429 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 01:36:33,471 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:36:33,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-07 01:36:33,646 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 16 treesize of output 12 [2021-11-07 01:36:33,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-07 01:36:33,736 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 01:36:33,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:33,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-07 01:36:33,968 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 01:36:33,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:33,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730464136] [2021-11-07 01:36:33,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730464136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:33,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:33,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 12 [2021-11-07 01:36:33,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322678161] [2021-11-07 01:36:33,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:36:33,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:33,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:36:33,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:36:33,970 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 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 01:36:34,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:34,638 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-11-07 01:36:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:36:34,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 01:36:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:34,641 INFO L225 Difference]: With dead ends: 51 [2021-11-07 01:36:34,641 INFO L226 Difference]: Without dead ends: 51 [2021-11-07 01:36:34,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:36:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-07 01:36:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2021-11-07 01:36:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.3125) internal successors, (42), 41 states have internal predecessors, (42), 0 states have call successors, (0), 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 01:36:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-11-07 01:36:34,646 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 20 [2021-11-07 01:36:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:34,646 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-11-07 01:36:34,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 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 01:36:34,646 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-11-07 01:36:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:36:34,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:34,647 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] [2021-11-07 01:36:34,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:34,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:34,851 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-07 01:36:34,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:34,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1977268703, now seen corresponding path program 1 times [2021-11-07 01:36:34,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:34,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24114951] [2021-11-07 01:36:34,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:34,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:34,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:34,853 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:34,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51314cda-fe03-45a3-ae09-50ebb5ae9b6b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:36:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:35,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-07 01:36:35,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:35,271 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 01:36:35,315 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:36:35,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-07 01:36:35,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-07 01:36:35,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:36:35,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:35,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 01:36:35,854 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-07 01:36:35,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 46 [2021-11-07 01:36:35,860 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 49 treesize of output 41 [2021-11-07 01:36:36,091 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-07 01:36:36,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 65 [2021-11-07 01:36:36,619 INFO L354 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2021-11-07 01:36:36,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 39 [2021-11-07 01:36:36,693 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 01:36:36,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:37,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2021-11-07 01:36:45,140 INFO L354 Elim1Store]: treesize reduction 569, result has 26.2 percent of original size [2021-11-07 01:36:45,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 38 case distinctions, treesize of input 174582 treesize of output 169779 [2021-11-07 01:36:50,970 WARN L207 SmtUtils]: Spent 5.83 s on a formula simplification. DAG size of input: 951 DAG size of output: 921 [2021-11-07 01:36:51,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:36:51,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 128613 treesize of output 128643 [2021-11-07 01:37:01,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4