./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH --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 8d4416b38cd75f122474354d64a020f92e3751959548582c6308a6e879679f77 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:51:15,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:51:15,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:51:15,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:51:15,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:51:15,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:51:15,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:51:15,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:51:15,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:51:15,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:51:15,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:51:15,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:51:15,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:51:15,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:51:15,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:51:15,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:51:15,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:51:15,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:51:15,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:51:15,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:51:15,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:51:15,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:51:15,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:51:15,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:51:15,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:51:15,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:51:15,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:51:15,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:51:15,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:51:15,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:51:15,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:51:15,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:51:15,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:51:15,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:51:15,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:51:15,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:51:15,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:51:15,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:51:15,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:51:15,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:51:15,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:51:15,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 03:51:15,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:51:15,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:51:15,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:51:15,586 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:51:15,587 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:51:15,587 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:51:15,587 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:51:15,588 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:51:15,588 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:51:15,588 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:51:15,590 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:51:15,590 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:51:15,590 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:51:15,591 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:51:15,591 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:51:15,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:51:15,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:51:15,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:51:15,593 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:51:15,593 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:51:15,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:51:15,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:51:15,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:51:15,594 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:51:15,594 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:51:15,595 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:51:15,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:51:15,595 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:51:15,596 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:51:15,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:51:15,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:51:15,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:51:15,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:51:15,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:51:15,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:51:15,598 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:51:15,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:51:15,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:51:15,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:51:15,599 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_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d4416b38cd75f122474354d64a020f92e3751959548582c6308a6e879679f77 [2021-11-03 03:51:15,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:51:16,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:51:16,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:51:16,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:51:16,009 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:51:16,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i [2021-11-03 03:51:16,115 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/data/d6de93ad8/f16243183a7d453daee5f6966cd90897/FLAGc85ab0404 [2021-11-03 03:51:16,872 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:51:16,873 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i [2021-11-03 03:51:16,916 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/data/d6de93ad8/f16243183a7d453daee5f6966cd90897/FLAGc85ab0404 [2021-11-03 03:51:17,013 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/data/d6de93ad8/f16243183a7d453daee5f6966cd90897 [2021-11-03 03:51:17,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:51:17,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:51:17,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:51:17,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:51:17,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:51:17,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:17" (1/1) ... [2021-11-03 03:51:17,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@209c5d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:17, skipping insertion in model container [2021-11-03 03:51:17,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:17" (1/1) ... [2021-11-03 03:51:17,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:51:17,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:51:17,761 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i[33021,33034] [2021-11-03 03:51:18,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:51:18,072 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 03:51:18,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c15deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:18, skipping insertion in model container [2021-11-03 03:51:18,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:51:18,074 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 03:51:18,076 INFO L168 Benchmark]: Toolchain (without parser) took 1056.60 ms. Allocated memory is still 100.7 MB. Free memory was 56.7 MB in the beginning and 63.9 MB in the end (delta: -7.2 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-11-03 03:51:18,077 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 100.7 MB. Free memory is still 75.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:51:18,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1053.01 ms. Allocated memory is still 100.7 MB. Free memory was 56.4 MB in the beginning and 63.9 MB in the end (delta: -7.4 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-11-03 03:51:18,081 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 100.7 MB. Free memory is still 75.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1053.01 ms. Allocated memory is still 100.7 MB. Free memory was 56.4 MB in the beginning and 63.9 MB in the end (delta: -7.4 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH --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 8d4416b38cd75f122474354d64a020f92e3751959548582c6308a6e879679f77 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:51:20,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:51:20,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:51:21,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:51:21,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:51:21,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:51:21,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:51:21,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:51:21,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:51:21,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:51:21,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:51:21,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:51:21,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:51:21,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:51:21,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:51:21,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:51:21,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:51:21,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:51:21,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:51:21,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:51:21,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:51:21,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:51:21,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:51:21,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:51:21,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:51:21,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:51:21,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:51:21,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:51:21,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:51:21,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:51:21,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:51:21,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:51:21,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:51:21,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:51:21,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:51:21,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:51:21,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:51:21,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:51:21,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:51:21,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:51:21,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:51:21,131 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 03:51:21,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:51:21,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:51:21,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:51:21,184 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:51:21,184 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:51:21,185 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:51:21,185 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:51:21,185 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:51:21,186 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:51:21,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:51:21,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:51:21,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:51:21,190 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:51:21,190 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:51:21,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:51:21,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:51:21,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:51:21,191 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:51:21,192 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:51:21,192 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:51:21,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:51:21,192 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:51:21,193 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:51:21,193 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:51:21,193 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:51:21,194 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:51:21,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:51:21,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:51:21,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:51:21,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:51:21,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:51:21,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:51:21,196 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:51:21,196 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:51:21,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:51:21,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:51:21,197 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_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d4416b38cd75f122474354d64a020f92e3751959548582c6308a6e879679f77 [2021-11-03 03:51:21,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:51:21,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:51:21,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:51:21,694 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:51:21,695 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:51:21,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i [2021-11-03 03:51:21,775 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/data/e038754d0/90b7cfbb0eb24f0daa136045753aac0a/FLAGf5702a315 [2021-11-03 03:51:22,520 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:51:22,521 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i [2021-11-03 03:51:22,549 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/data/e038754d0/90b7cfbb0eb24f0daa136045753aac0a/FLAGf5702a315 [2021-11-03 03:51:22,659 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/data/e038754d0/90b7cfbb0eb24f0daa136045753aac0a [2021-11-03 03:51:22,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:51:22,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:51:22,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:51:22,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:51:22,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:51:22,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:22" (1/1) ... [2021-11-03 03:51:22,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b3535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:22, skipping insertion in model container [2021-11-03 03:51:22,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:22" (1/1) ... [2021-11-03 03:51:22,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:51:22,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:51:23,394 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i[33021,33034] [2021-11-03 03:51:23,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:51:23,596 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 03:51:23,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:51:23,657 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i[33021,33034] [2021-11-03 03:51:23,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:51:23,877 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:51:23,911 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-1.i[33021,33034] [2021-11-03 03:51:23,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:51:24,058 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:51:24,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:24 WrapperNode [2021-11-03 03:51:24,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:51:24,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:51:24,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:51:24,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:51:24,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:24" (1/1) ... [2021-11-03 03:51:24,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:24" (1/1) ... [2021-11-03 03:51:24,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:51:24,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:51:24,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:51:24,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:51:24,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:24" (1/1) ... [2021-11-03 03:51:24,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:24" (1/1) ... [2021-11-03 03:51:24,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:24" (1/1) ... [2021-11-03 03:51:24,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:24" (1/1) ... [2021-11-03 03:51:24,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:24" (1/1) ... [2021-11-03 03:51:24,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:24" (1/1) ... [2021-11-03 03:51:24,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:24" (1/1) ... [2021-11-03 03:51:24,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:51:24,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:51:24,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:51:24,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:51:24,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:24" (1/1) ... [2021-11-03 03:51:24,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:51:24,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:51:24,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:51:24,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:51:24,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 03:51:24,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 03:51:24,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 03:51:24,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 03:51:24,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:51:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 03:51:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 03:51:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 03:51:24,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:51:24,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:51:24,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:51:32,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:51:32,873 INFO L299 CfgBuilder]: Removed 98 assume(true) statements. [2021-11-03 03:51:32,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:32 BoogieIcfgContainer [2021-11-03 03:51:32,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:51:32,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:51:32,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:51:32,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:51:32,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:51:22" (1/3) ... [2021-11-03 03:51:32,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad1ebe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:32, skipping insertion in model container [2021-11-03 03:51:32,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:24" (2/3) ... [2021-11-03 03:51:32,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad1ebe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:32, skipping insertion in model container [2021-11-03 03:51:32,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:32" (3/3) ... [2021-11-03 03:51:32,891 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test4-1.i [2021-11-03 03:51:32,899 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:51:32,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 657 error locations. [2021-11-03 03:51:32,961 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:51:32,969 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 [2021-11-03 03:51:32,970 INFO L340 AbstractCegarLoop]: Starting to check reachability of 657 error locations. [2021-11-03 03:51:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 1301 states, 643 states have (on average 2.244167962674961) internal successors, (1443), 1300 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:33,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:51:33,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:33,054 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:51:33,054 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:51:33,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:33,068 INFO L85 PathProgramCache]: Analyzing trace with hash 28698764, now seen corresponding path program 1 times [2021-11-03 03:51:33,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:33,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72724324] [2021-11-03 03:51:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:33,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:33,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:33,091 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:33,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:51:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:33,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 03:51:33,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:33,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:33,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:33,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72724324] [2021-11-03 03:51:33,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72724324] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:33,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:33,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:51:33,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052524907] [2021-11-03 03:51:33,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 03:51:33,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:33,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 03:51:33,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:51:33,482 INFO L87 Difference]: Start difference. First operand has 1301 states, 643 states have (on average 2.244167962674961) internal successors, (1443), 1300 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:33,664 INFO L93 Difference]: Finished difference Result 1283 states and 1348 transitions. [2021-11-03 03:51:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 03:51:33,666 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-03 03:51:33,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:33,705 INFO L225 Difference]: With dead ends: 1283 [2021-11-03 03:51:33,705 INFO L226 Difference]: Without dead ends: 1281 [2021-11-03 03:51:33,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:51:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-11-03 03:51:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2021-11-03 03:51:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 634 states have (on average 2.1230283911671926) internal successors, (1346), 1280 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:33,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1346 transitions. [2021-11-03 03:51:33,872 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1346 transitions. Word has length 5 [2021-11-03 03:51:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:33,873 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1346 transitions. [2021-11-03 03:51:33,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1346 transitions. [2021-11-03 03:51:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:51:33,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:33,875 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:51:33,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:34,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:34,096 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:51:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:34,102 INFO L85 PathProgramCache]: Analyzing trace with hash 28698826, now seen corresponding path program 1 times [2021-11-03 03:51:34,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:34,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143312657] [2021-11-03 03:51:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:34,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:34,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:34,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:34,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:51:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:34,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:51:34,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:34,362 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 [2021-11-03 03:51:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:34,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:34,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:34,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143312657] [2021-11-03 03:51:34,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143312657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:34,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:34,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:51:34,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175426466] [2021-11-03 03:51:34,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:51:34,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:51:34,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:51:34,435 INFO L87 Difference]: Start difference. First operand 1281 states and 1346 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:37,861 INFO L93 Difference]: Finished difference Result 1318 states and 1396 transitions. [2021-11-03 03:51:37,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:51:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-03 03:51:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:37,891 INFO L225 Difference]: With dead ends: 1318 [2021-11-03 03:51:37,892 INFO L226 Difference]: Without dead ends: 1318 [2021-11-03 03:51:37,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:51:37,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-11-03 03:51:37,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1264. [2021-11-03 03:51:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 710 states have (on average 1.9549295774647888) internal successors, (1388), 1263 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1388 transitions. [2021-11-03 03:51:37,938 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1388 transitions. Word has length 5 [2021-11-03 03:51:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:37,938 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1388 transitions. [2021-11-03 03:51:37,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:37,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1388 transitions. [2021-11-03 03:51:37,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:51:37,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:37,940 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:51:37,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 03:51:38,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:38,155 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:51:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:38,156 INFO L85 PathProgramCache]: Analyzing trace with hash 28698827, now seen corresponding path program 1 times [2021-11-03 03:51:38,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:38,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017741609] [2021-11-03 03:51:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:38,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:38,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:38,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:38,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:51:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:38,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:51:38,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:38,363 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 [2021-11-03 03:51:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:38,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:38,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:38,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017741609] [2021-11-03 03:51:38,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017741609] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:38,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:38,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 03:51:38,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746153179] [2021-11-03 03:51:38,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:51:38,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:51:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:38,473 INFO L87 Difference]: Start difference. First operand 1264 states and 1388 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-11-03 03:51:46,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:46,680 INFO L93 Difference]: Finished difference Result 1621 states and 1766 transitions. [2021-11-03 03:51:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:51:46,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 5 [2021-11-03 03:51:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:46,692 INFO L225 Difference]: With dead ends: 1621 [2021-11-03 03:51:46,692 INFO L226 Difference]: Without dead ends: 1621 [2021-11-03 03:51:46,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:46,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-11-03 03:51:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1420. [2021-11-03 03:51:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 876 states have (on average 1.9337899543378996) internal successors, (1694), 1419 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1694 transitions. [2021-11-03 03:51:46,739 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1694 transitions. Word has length 5 [2021-11-03 03:51:46,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:46,740 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 1694 transitions. [2021-11-03 03:51:46,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-11-03 03:51:46,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1694 transitions. [2021-11-03 03:51:46,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 03:51:46,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:46,742 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 03:51:46,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:46,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:46,962 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:51:46,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:46,963 INFO L85 PathProgramCache]: Analyzing trace with hash 891404513, now seen corresponding path program 1 times [2021-11-03 03:51:46,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:46,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404745361] [2021-11-03 03:51:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:46,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:46,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:46,968 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:46,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 03:51:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:47,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:51:47,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:47,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:47,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:47,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404745361] [2021-11-03 03:51:47,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404745361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:47,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:47,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:51:47,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349235904] [2021-11-03 03:51:47,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:51:47,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:47,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:51:47,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:47,155 INFO L87 Difference]: Start difference. First operand 1420 states and 1694 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-03 03:51:47,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:47,328 INFO L93 Difference]: Finished difference Result 2783 states and 3320 transitions. [2021-11-03 03:51:47,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:51:47,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 6 [2021-11-03 03:51:47,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:47,347 INFO L225 Difference]: With dead ends: 2783 [2021-11-03 03:51:47,348 INFO L226 Difference]: Without dead ends: 2783 [2021-11-03 03:51:47,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-11-03 03:51:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2254. [2021-11-03 03:51:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 1710 states have (on average 1.9415204678362572) internal successors, (3320), 2253 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 3320 transitions. [2021-11-03 03:51:47,435 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 3320 transitions. Word has length 6 [2021-11-03 03:51:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:47,435 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 3320 transitions. [2021-11-03 03:51:47,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-03 03:51:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 3320 transitions. [2021-11-03 03:51:47,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 03:51:47,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:47,437 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:47,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:47,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:47,658 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:51:47,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:47,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2013913556, now seen corresponding path program 1 times [2021-11-03 03:51:47,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:47,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479074122] [2021-11-03 03:51:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:47,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:47,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:47,662 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:47,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 03:51:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:47,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:51:47,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:47,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:47,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:47,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479074122] [2021-11-03 03:51:47,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479074122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:47,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:47,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:51:47,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742382719] [2021-11-03 03:51:47,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:51:47,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:47,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:51:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:47,940 INFO L87 Difference]: Start difference. First operand 2254 states and 3320 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-11-03 03:51:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:47,993 INFO L93 Difference]: Finished difference Result 2194 states and 3234 transitions. [2021-11-03 03:51:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:51:47,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 11 [2021-11-03 03:51:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:48,010 INFO L225 Difference]: With dead ends: 2194 [2021-11-03 03:51:48,010 INFO L226 Difference]: Without dead ends: 2194 [2021-11-03 03:51:48,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-11-03 03:51:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2194. [2021-11-03 03:51:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1674 states have (on average 1.9318996415770608) internal successors, (3234), 2193 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 3234 transitions. [2021-11-03 03:51:48,080 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 3234 transitions. Word has length 11 [2021-11-03 03:51:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:48,081 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 3234 transitions. [2021-11-03 03:51:48,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-11-03 03:51:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 3234 transitions. [2021-11-03 03:51:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 03:51:48,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:48,082 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:48,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:48,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:48,297 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:51:48,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:48,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1659327634, now seen corresponding path program 1 times [2021-11-03 03:51:48,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:48,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927232618] [2021-11-03 03:51:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:48,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:48,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:48,301 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:48,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 03:51:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:48,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:51:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:48,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:48,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:48,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927232618] [2021-11-03 03:51:48,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927232618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:48,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:48,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:51:48,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946690869] [2021-11-03 03:51:48,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:51:48,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:48,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:51:48,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:51:48,601 INFO L87 Difference]: Start difference. First operand 2194 states and 3234 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:48,734 INFO L93 Difference]: Finished difference Result 2166 states and 3178 transitions. [2021-11-03 03:51:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:51:48,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-11-03 03:51:48,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:48,751 INFO L225 Difference]: With dead ends: 2166 [2021-11-03 03:51:48,751 INFO L226 Difference]: Without dead ends: 2166 [2021-11-03 03:51:48,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:51:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2021-11-03 03:51:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2164. [2021-11-03 03:51:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 1658 states have (on average 1.9155609167671894) internal successors, (3176), 2163 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 3176 transitions. [2021-11-03 03:51:48,848 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 3176 transitions. Word has length 13 [2021-11-03 03:51:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:48,849 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 3176 transitions. [2021-11-03 03:51:48,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 3176 transitions. [2021-11-03 03:51:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 03:51:48,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:48,852 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:48,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:49,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:49,076 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:51:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:49,076 INFO L85 PathProgramCache]: Analyzing trace with hash 913198236, now seen corresponding path program 1 times [2021-11-03 03:51:49,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:49,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953051809] [2021-11-03 03:51:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:49,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:49,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:49,080 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:49,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 03:51:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:49,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:51:49,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:49,361 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 [2021-11-03 03:51:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:49,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:49,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:49,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953051809] [2021-11-03 03:51:49,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953051809] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:49,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:49,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:51:49,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872570775] [2021-11-03 03:51:49,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:51:49,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:49,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:51:49,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:49,653 INFO L87 Difference]: Start difference. First operand 2164 states and 3176 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 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) [2021-11-03 03:51:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:53,660 INFO L93 Difference]: Finished difference Result 2851 states and 4037 transitions. [2021-11-03 03:51:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:51:53,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 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 27 [2021-11-03 03:51:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:53,682 INFO L225 Difference]: With dead ends: 2851 [2021-11-03 03:51:53,682 INFO L226 Difference]: Without dead ends: 2851 [2021-11-03 03:51:53,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:51:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-11-03 03:51:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2160. [2021-11-03 03:51:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 1658 states have (on average 1.910735826296743) internal successors, (3168), 2159 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 3168 transitions. [2021-11-03 03:51:53,759 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 3168 transitions. Word has length 27 [2021-11-03 03:51:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:53,759 INFO L470 AbstractCegarLoop]: Abstraction has 2160 states and 3168 transitions. [2021-11-03 03:51:53,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 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) [2021-11-03 03:51:53,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 3168 transitions. [2021-11-03 03:51:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 03:51:53,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:53,761 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:53,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-03 03:51:53,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:53,977 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:51:53,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:53,977 INFO L85 PathProgramCache]: Analyzing trace with hash 913198237, now seen corresponding path program 1 times [2021-11-03 03:51:53,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:53,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424273838] [2021-11-03 03:51:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:53,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:53,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:53,985 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:54,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 03:51:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:54,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:51:54,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:54,269 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 [2021-11-03 03:51:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:54,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:55,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:55,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424273838] [2021-11-03 03:51:55,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424273838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:55,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:55,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:51:55,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612404865] [2021-11-03 03:51:55,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:51:55,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:55,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:51:55,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:51:55,195 INFO L87 Difference]: Start difference. First operand 2160 states and 3168 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 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) [2021-11-03 03:52:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:04,421 INFO L93 Difference]: Finished difference Result 2460 states and 3373 transitions. [2021-11-03 03:52:04,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 03:52:04,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 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) Word has length 27 [2021-11-03 03:52:04,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:04,437 INFO L225 Difference]: With dead ends: 2460 [2021-11-03 03:52:04,437 INFO L226 Difference]: Without dead ends: 2460 [2021-11-03 03:52:04,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 03:52:04,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-11-03 03:52:04,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2156. [2021-11-03 03:52:04,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 1658 states have (on average 1.9059107358262968) internal successors, (3160), 2155 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 3160 transitions. [2021-11-03 03:52:04,533 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 3160 transitions. Word has length 27 [2021-11-03 03:52:04,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:04,534 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 3160 transitions. [2021-11-03 03:52:04,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 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) [2021-11-03 03:52:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 3160 transitions. [2021-11-03 03:52:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 03:52:04,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:04,537 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:04,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 03:52:04,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:52:04,752 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:52:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash 944973104, now seen corresponding path program 1 times [2021-11-03 03:52:04,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:52:04,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490945792] [2021-11-03 03:52:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:04,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:52:04,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:52:04,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:52:04,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 03:52:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:05,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:52:05,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:05,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:52:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:05,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:52:05,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490945792] [2021-11-03 03:52:05,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490945792] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:52:05,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:52:05,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:52:05,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519804664] [2021-11-03 03:52:05,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:52:05,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:52:05,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:52:05,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:52:05,444 INFO L87 Difference]: Start difference. First operand 2156 states and 3160 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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) [2021-11-03 03:52:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:05,523 INFO L93 Difference]: Finished difference Result 2144 states and 3140 transitions. [2021-11-03 03:52:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:52:05,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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) Word has length 42 [2021-11-03 03:52:05,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:05,538 INFO L225 Difference]: With dead ends: 2144 [2021-11-03 03:52:05,538 INFO L226 Difference]: Without dead ends: 2144 [2021-11-03 03:52:05,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:52:05,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-11-03 03:52:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2144. [2021-11-03 03:52:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 1646 states have (on average 1.9076549210206561) internal successors, (3140), 2143 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3140 transitions. [2021-11-03 03:52:05,593 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3140 transitions. Word has length 42 [2021-11-03 03:52:05,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:05,596 INFO L470 AbstractCegarLoop]: Abstraction has 2144 states and 3140 transitions. [2021-11-03 03:52:05,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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) [2021-11-03 03:52:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3140 transitions. [2021-11-03 03:52:05,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 03:52:05,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:05,602 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:05,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 03:52:05,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:52:05,818 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:52:05,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:05,819 INFO L85 PathProgramCache]: Analyzing trace with hash 29098340, now seen corresponding path program 1 times [2021-11-03 03:52:05,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:52:05,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631133672] [2021-11-03 03:52:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:05,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:52:05,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:52:05,822 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:52:05,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 03:52:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:06,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:52:06,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:06,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:52:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:07,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:52:07,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631133672] [2021-11-03 03:52:07,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631133672] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:52:07,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:52:07,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:52:07,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029761291] [2021-11-03 03:52:07,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:52:07,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:52:07,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:52:07,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:52:07,219 INFO L87 Difference]: Start difference. First operand 2144 states and 3140 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) [2021-11-03 03:52:07,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:07,331 INFO L93 Difference]: Finished difference Result 1960 states and 2785 transitions. [2021-11-03 03:52:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:52:07,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) Word has length 50 [2021-11-03 03:52:07,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:07,345 INFO L225 Difference]: With dead ends: 1960 [2021-11-03 03:52:07,346 INFO L226 Difference]: Without dead ends: 1960 [2021-11-03 03:52:07,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:52:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-11-03 03:52:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1960. [2021-11-03 03:52:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1462 states have (on average 1.9049247606019153) internal successors, (2785), 1959 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 2785 transitions. [2021-11-03 03:52:07,392 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 2785 transitions. Word has length 50 [2021-11-03 03:52:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:07,392 INFO L470 AbstractCegarLoop]: Abstraction has 1960 states and 2785 transitions. [2021-11-03 03:52:07,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) [2021-11-03 03:52:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 2785 transitions. [2021-11-03 03:52:07,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 03:52:07,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:07,395 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:07,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 03:52:07,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:52:07,612 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:52:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:07,612 INFO L85 PathProgramCache]: Analyzing trace with hash -839399161, now seen corresponding path program 1 times [2021-11-03 03:52:07,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:52:07,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372950474] [2021-11-03 03:52:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:07,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:52:07,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:52:07,615 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:52:07,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 03:52:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:08,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:52:08,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:08,189 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 [2021-11-03 03:52:08,197 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 [2021-11-03 03:52:09,084 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 03:52:09,085 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 28 treesize of output 30 [2021-11-03 03:52:09,094 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 03:52:09,094 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 27 treesize of output 23 [2021-11-03 03:52:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:09,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:52:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:14,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:52:14,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372950474] [2021-11-03 03:52:14,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372950474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:52:14,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:52:14,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:52:14,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304173226] [2021-11-03 03:52:14,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:52:14,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:52:14,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:52:14,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 03:52:14,700 INFO L87 Difference]: Start difference. First operand 1960 states and 2785 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:35,151 INFO L93 Difference]: Finished difference Result 2626 states and 3583 transitions. [2021-11-03 03:52:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:52:35,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 53 [2021-11-03 03:52:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:35,167 INFO L225 Difference]: With dead ends: 2626 [2021-11-03 03:52:35,167 INFO L226 Difference]: Without dead ends: 2626 [2021-11-03 03:52:35,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 03:52:35,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-11-03 03:52:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2118. [2021-11-03 03:52:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 1658 states have (on average 1.8522316043425815) internal successors, (3071), 2117 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:35,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 3071 transitions. [2021-11-03 03:52:35,223 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 3071 transitions. Word has length 53 [2021-11-03 03:52:35,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:35,223 INFO L470 AbstractCegarLoop]: Abstraction has 2118 states and 3071 transitions. [2021-11-03 03:52:35,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 3071 transitions. [2021-11-03 03:52:35,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 03:52:35,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:35,225 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:35,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 03:52:35,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:52:35,435 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:52:35,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:35,435 INFO L85 PathProgramCache]: Analyzing trace with hash -416260760, now seen corresponding path program 1 times [2021-11-03 03:52:35,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:52:35,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762596462] [2021-11-03 03:52:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:35,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:52:35,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:52:35,437 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:52:35,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 03:52:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:35,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:52:35,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:36,066 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 [2021-11-03 03:52:36,083 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 21 treesize of output 17 [2021-11-03 03:52:36,127 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 11 [2021-11-03 03:52:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:36,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:52:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:36,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:52:36,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762596462] [2021-11-03 03:52:36,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762596462] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:52:36,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:52:36,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:52:36,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263375671] [2021-11-03 03:52:36,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:52:36,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:52:36,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:52:36,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:52:36,316 INFO L87 Difference]: Start difference. First operand 2118 states and 3071 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 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) [2021-11-03 03:52:43,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:43,573 INFO L93 Difference]: Finished difference Result 2749 states and 3837 transitions. [2021-11-03 03:52:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 03:52:43,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 03:52:43,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:43,589 INFO L225 Difference]: With dead ends: 2749 [2021-11-03 03:52:43,589 INFO L226 Difference]: Without dead ends: 2749 [2021-11-03 03:52:43,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:52:43,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-11-03 03:52:43,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2117. [2021-11-03 03:52:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 1658 states have (on average 1.8510253317249699) internal successors, (3069), 2116 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 3069 transitions. [2021-11-03 03:52:43,644 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 3069 transitions. Word has length 59 [2021-11-03 03:52:43,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:43,644 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 3069 transitions. [2021-11-03 03:52:43,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 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) [2021-11-03 03:52:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 3069 transitions. [2021-11-03 03:52:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 03:52:43,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:43,646 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:43,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 03:52:43,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:52:43,864 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:52:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash -19181353, now seen corresponding path program 1 times [2021-11-03 03:52:43,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:52:43,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948083589] [2021-11-03 03:52:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:43,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:52:43,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:52:43,866 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:52:43,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 03:52:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:44,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 03:52:44,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:44,512 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 [2021-11-03 03:52:44,567 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 19 treesize of output 15 [2021-11-03 03:52:44,583 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 13 treesize of output 9 [2021-11-03 03:52:44,661 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 39 treesize of output 27 [2021-11-03 03:52:44,682 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 12 [2021-11-03 03:52:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:44,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:52:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:45,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:52:45,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948083589] [2021-11-03 03:52:45,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948083589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:52:45,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:52:45,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 03:52:45,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41102200] [2021-11-03 03:52:45,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:52:45,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:52:45,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:52:45,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:52:45,407 INFO L87 Difference]: Start difference. First operand 2117 states and 3069 transitions. Second operand has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:53:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:53:07,587 INFO L93 Difference]: Finished difference Result 2494 states and 3479 transitions. [2021-11-03 03:53:07,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 03:53:07,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 03:53:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:53:07,596 INFO L225 Difference]: With dead ends: 2494 [2021-11-03 03:53:07,596 INFO L226 Difference]: Without dead ends: 2494 [2021-11-03 03:53:07,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 03:53:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2021-11-03 03:53:07,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2116. [2021-11-03 03:53:07,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 1658 states have (on average 1.8498190591073582) internal successors, (3067), 2115 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:53:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 3067 transitions. [2021-11-03 03:53:07,648 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 3067 transitions. Word has length 60 [2021-11-03 03:53:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:53:07,649 INFO L470 AbstractCegarLoop]: Abstraction has 2116 states and 3067 transitions. [2021-11-03 03:53:07,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:53:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 3067 transitions. [2021-11-03 03:53:07,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 03:53:07,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:53:07,650 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:53:07,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 03:53:07,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:53:07,880 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:53:07,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:53:07,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1927168386, now seen corresponding path program 1 times [2021-11-03 03:53:07,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:53:07,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972886635] [2021-11-03 03:53:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:53:07,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:53:07,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:53:07,882 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:53:07,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 03:53:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:53:08,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:53:08,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:08,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:08,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:53:08,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972886635] [2021-11-03 03:53:08,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972886635] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:53:08,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:53:08,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:53:08,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494120339] [2021-11-03 03:53:08,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:53:08,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:53:08,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:53:08,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:53:08,856 INFO L87 Difference]: Start difference. First operand 2116 states and 3067 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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) [2021-11-03 03:53:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:53:09,128 INFO L93 Difference]: Finished difference Result 2748 states and 3829 transitions. [2021-11-03 03:53:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:53:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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) Word has length 64 [2021-11-03 03:53:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:53:09,134 INFO L225 Difference]: With dead ends: 2748 [2021-11-03 03:53:09,135 INFO L226 Difference]: Without dead ends: 2748 [2021-11-03 03:53:09,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:53:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-11-03 03:53:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2134. [2021-11-03 03:53:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 1676 states have (on average 1.840692124105012) internal successors, (3085), 2133 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:53:09,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 3085 transitions. [2021-11-03 03:53:09,188 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 3085 transitions. Word has length 64 [2021-11-03 03:53:09,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:53:09,189 INFO L470 AbstractCegarLoop]: Abstraction has 2134 states and 3085 transitions. [2021-11-03 03:53:09,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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) [2021-11-03 03:53:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 3085 transitions. [2021-11-03 03:53:09,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:53:09,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:53:09,190 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:53:09,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 03:53:09,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:53:09,406 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:53:09,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:53:09,406 INFO L85 PathProgramCache]: Analyzing trace with hash -938951394, now seen corresponding path program 1 times [2021-11-03 03:53:09,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:53:09,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8005816] [2021-11-03 03:53:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:53:09,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:53:09,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:53:09,408 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:53:09,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 03:53:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:53:10,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:53:10,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:10,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:10,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:53:10,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8005816] [2021-11-03 03:53:10,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8005816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:53:10,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [620085074] [2021-11-03 03:53:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:53:10,586 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:53:10,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:53:10,589 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:53:10,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 03:53:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:53:11,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:53:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:11,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:11,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [620085074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:53:11,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324104413] [2021-11-03 03:53:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:53:11,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:53:11,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:53:11,870 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:53:11,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 03:53:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:53:12,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:53:12,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:12,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:12,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324104413] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:53:12,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:53:12,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 03:53:12,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457347527] [2021-11-03 03:53:12,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:53:12,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:53:12,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:53:12,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:53:12,811 INFO L87 Difference]: Start difference. First operand 2134 states and 3085 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 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) [2021-11-03 03:53:13,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:53:13,541 INFO L93 Difference]: Finished difference Result 2784 states and 3865 transitions. [2021-11-03 03:53:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:53:13,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 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) Word has length 66 [2021-11-03 03:53:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:53:13,547 INFO L225 Difference]: With dead ends: 2784 [2021-11-03 03:53:13,547 INFO L226 Difference]: Without dead ends: 2784 [2021-11-03 03:53:13,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:53:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-11-03 03:53:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2170. [2021-11-03 03:53:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 1712 states have (on average 1.8230140186915889) internal successors, (3121), 2169 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:53:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3121 transitions. [2021-11-03 03:53:13,597 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3121 transitions. Word has length 66 [2021-11-03 03:53:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:53:13,598 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3121 transitions. [2021-11-03 03:53:13,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 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) [2021-11-03 03:53:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3121 transitions. [2021-11-03 03:53:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 03:53:13,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:53:13,599 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:53:13,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 03:53:13,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 03:53:14,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 03:53:14,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:53:14,206 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:53:14,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:53:14,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1093747294, now seen corresponding path program 2 times [2021-11-03 03:53:14,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:53:14,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690068268] [2021-11-03 03:53:14,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:53:14,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:53:14,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:53:14,208 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:53:14,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 03:53:15,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:53:15,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:53:15,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:53:15,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:15,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:16,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:53:16,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690068268] [2021-11-03 03:53:16,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690068268] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:53:16,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945260868] [2021-11-03 03:53:16,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:53:16,224 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:53:16,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:53:16,230 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:53:16,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 03:53:18,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:53:18,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:53:18,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:53:18,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:18,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:18,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [945260868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:53:18,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63668987] [2021-11-03 03:53:18,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:53:18,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:53:18,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:53:18,506 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:53:18,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 03:53:36,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:53:36,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:53:36,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:53:36,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:37,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:37,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63668987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:53:37,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:53:37,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-03 03:53:37,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236921654] [2021-11-03 03:53:37,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 03:53:37,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:53:37,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 03:53:37,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-03 03:53:37,215 INFO L87 Difference]: Start difference. First operand 2170 states and 3121 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:53:41,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:53:41,421 INFO L93 Difference]: Finished difference Result 2856 states and 3937 transitions. [2021-11-03 03:53:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 03:53:41,422 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 03:53:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:53:41,426 INFO L225 Difference]: With dead ends: 2856 [2021-11-03 03:53:41,426 INFO L226 Difference]: Without dead ends: 2856 [2021-11-03 03:53:41,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-03 03:53:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-11-03 03:53:41,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2242. [2021-11-03 03:53:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1784 states have (on average 1.7897982062780269) internal successors, (3193), 2241 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:53:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3193 transitions. [2021-11-03 03:53:41,471 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3193 transitions. Word has length 70 [2021-11-03 03:53:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:53:41,472 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3193 transitions. [2021-11-03 03:53:41,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:53:41,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3193 transitions. [2021-11-03 03:53:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 03:53:41,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:53:41,473 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:53:41,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 03:53:41,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-03 03:53:41,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-03 03:53:42,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:53:42,102 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 03:53:42,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:53:42,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1408996130, now seen corresponding path program 3 times [2021-11-03 03:53:42,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:53:42,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215338336] [2021-11-03 03:53:42,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:53:42,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:53:42,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:53:42,104 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:53:42,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 03:53:43,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 03:53:43,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:53:43,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 03:53:43,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:44,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:45,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:53:45,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215338336] [2021-11-03 03:53:45,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215338336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:53:45,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754266061] [2021-11-03 03:53:45,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:53:45,990 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:53:45,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:53:45,997 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:53:46,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 03:53:54,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 03:53:54,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:53:54,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 03:53:54,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:55,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:55,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [754266061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:53:55,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559020928] [2021-11-03 03:53:55,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:53:55,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:53:55,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:53:55,400 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:53:55,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52ed967a-596e-4d95-9d7e-35eab1f1e5d1/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process