./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.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_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/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_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/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_e970574b-0e45-47e5-912f-416c947c0fe6/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 cb52e740550b0ec41396d39fc3beea75c2dcd7385105eaeaaabca1f449d4b319 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:30:17,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:30:17,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:30:17,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:30:17,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:30:17,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:30:17,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:30:17,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:30:17,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:30:17,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:30:17,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:30:17,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:30:17,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:30:17,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:30:17,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:30:17,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:30:17,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:30:17,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:30:17,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:30:17,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:30:17,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:30:17,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:30:17,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:30:17,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:30:17,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:30:17,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:30:17,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:30:17,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:30:17,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:30:17,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:30:17,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:30:17,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:30:17,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:30:17,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:30:17,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:30:17,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:30:17,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:30:17,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:30:17,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:30:17,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:30:17,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:30:17,394 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:30:17,424 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:30:17,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:30:17,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:30:17,425 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:30:17,426 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:30:17,426 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:30:17,426 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:30:17,426 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:30:17,427 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:30:17,427 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:30:17,427 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:30:17,427 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:30:17,428 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:30:17,428 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:30:17,428 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:30:17,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:30:17,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:30:17,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:30:17,430 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:30:17,430 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:30:17,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:30:17,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:30:17,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:30:17,431 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:30:17,431 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:30:17,431 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:30:17,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:30:17,432 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:30:17,432 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:30:17,432 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:30:17,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:30:17,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:30:17,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:30:17,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:30:17,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:30:17,434 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:30:17,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:30:17,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:30:17,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:30:17,435 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_e970574b-0e45-47e5-912f-416c947c0fe6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb52e740550b0ec41396d39fc3beea75c2dcd7385105eaeaaabca1f449d4b319 [2021-11-03 04:30:17,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:30:17,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:30:17,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:30:17,749 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:30:17,750 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:30:17,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i [2021-11-03 04:30:17,841 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/data/aa243ce09/e60310d65b47440e8259f75457f59d8b/FLAGb5668cbcc [2021-11-03 04:30:18,606 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:30:18,609 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i [2021-11-03 04:30:18,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/data/aa243ce09/e60310d65b47440e8259f75457f59d8b/FLAGb5668cbcc [2021-11-03 04:30:18,691 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/data/aa243ce09/e60310d65b47440e8259f75457f59d8b [2021-11-03 04:30:18,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:30:18,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:30:18,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:30:18,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:30:18,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:30:18,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:30:18" (1/1) ... [2021-11-03 04:30:18,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62404848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:18, skipping insertion in model container [2021-11-03 04:30:18,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:30:18" (1/1) ... [2021-11-03 04:30:18,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:30:18,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:30:19,378 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_e970574b-0e45-47e5-912f-416c947c0fe6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[33021,33034] [2021-11-03 04:30:19,666 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_e970574b-0e45-47e5-912f-416c947c0fe6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[84583,84596] [2021-11-03 04:30:19,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:30:19,688 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 04:30:19,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1cbc57a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:19, skipping insertion in model container [2021-11-03 04:30:19,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:30:19,689 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:30:19,691 INFO L168 Benchmark]: Toolchain (without parser) took 986.45 ms. Allocated memory is still 100.7 MB. Free memory was 55.4 MB in the beginning and 53.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:30:19,692 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 100.7 MB. Free memory is still 76.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:30:19,693 INFO L168 Benchmark]: CACSL2BoogieTranslator took 981.79 ms. Allocated memory is still 100.7 MB. Free memory was 55.2 MB in the beginning and 53.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:30:19,696 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 100.7 MB. Free memory is still 76.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 981.79 ms. Allocated memory is still 100.7 MB. Free memory was 55.2 MB in the beginning and 53.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2221]: 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_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/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_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/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_e970574b-0e45-47e5-912f-416c947c0fe6/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 cb52e740550b0ec41396d39fc3beea75c2dcd7385105eaeaaabca1f449d4b319 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:30:22,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:30:22,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:30:22,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:30:22,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:30:22,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:30:22,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:30:22,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:30:22,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:30:22,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:30:22,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:30:22,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:30:22,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:30:22,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:30:22,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:30:22,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:30:22,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:30:22,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:30:22,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:30:22,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:30:22,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:30:22,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:30:22,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:30:22,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:30:22,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:30:22,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:30:22,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:30:22,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:30:22,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:30:22,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:30:22,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:30:22,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:30:22,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:30:22,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:30:22,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:30:22,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:30:22,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:30:22,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:30:22,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:30:22,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:30:22,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:30:22,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:30:22,324 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:30:22,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:30:22,325 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:30:22,325 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:30:22,326 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:30:22,326 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:30:22,326 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:30:22,326 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:30:22,326 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:30:22,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:30:22,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:30:22,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:30:22,328 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:30:22,328 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:30:22,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:30:22,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:30:22,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:30:22,329 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:30:22,329 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:30:22,329 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:30:22,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:30:22,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:30:22,332 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:30:22,333 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:30:22,333 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:30:22,333 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:30:22,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:30:22,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:30:22,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:30:22,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:30:22,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:30:22,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:30:22,336 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:30:22,336 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:30:22,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:30:22,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:30:22,337 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_e970574b-0e45-47e5-912f-416c947c0fe6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb52e740550b0ec41396d39fc3beea75c2dcd7385105eaeaaabca1f449d4b319 [2021-11-03 04:30:22,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:30:22,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:30:22,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:30:22,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:30:22,729 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:30:22,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i [2021-11-03 04:30:22,806 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/data/572814d29/1deded0605404ec68a2bf8811387f122/FLAG3222569f3 [2021-11-03 04:30:23,681 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:30:23,682 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i [2021-11-03 04:30:23,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/data/572814d29/1deded0605404ec68a2bf8811387f122/FLAG3222569f3 [2021-11-03 04:30:24,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/data/572814d29/1deded0605404ec68a2bf8811387f122 [2021-11-03 04:30:24,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:30:24,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:30:24,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:30:24,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:30:24,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:30:24,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:30:24" (1/1) ... [2021-11-03 04:30:24,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d13ffe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:24, skipping insertion in model container [2021-11-03 04:30:24,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:30:24" (1/1) ... [2021-11-03 04:30:24,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:30:24,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:30:24,822 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_e970574b-0e45-47e5-912f-416c947c0fe6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[33021,33034] [2021-11-03 04:30:25,096 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_e970574b-0e45-47e5-912f-416c947c0fe6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[84583,84596] [2021-11-03 04:30:25,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:30:25,135 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:30:25,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:30:25,177 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_e970574b-0e45-47e5-912f-416c947c0fe6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[33021,33034] [2021-11-03 04:30:25,313 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_e970574b-0e45-47e5-912f-416c947c0fe6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[84583,84596] [2021-11-03 04:30:25,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:30:25,383 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:30:25,433 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_e970574b-0e45-47e5-912f-416c947c0fe6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[33021,33034] [2021-11-03 04:30:25,599 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_e970574b-0e45-47e5-912f-416c947c0fe6/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[84583,84596] [2021-11-03 04:30:25,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:30:25,673 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:30:25,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:25 WrapperNode [2021-11-03 04:30:25,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:30:25,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:30:25,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:30:25,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:30:25,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:25" (1/1) ... [2021-11-03 04:30:25,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:25" (1/1) ... [2021-11-03 04:30:26,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:30:26,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:30:26,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:30:26,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:30:26,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:25" (1/1) ... [2021-11-03 04:30:26,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:25" (1/1) ... [2021-11-03 04:30:26,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:25" (1/1) ... [2021-11-03 04:30:26,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:25" (1/1) ... [2021-11-03 04:30:26,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:25" (1/1) ... [2021-11-03 04:30:26,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:25" (1/1) ... [2021-11-03 04:30:26,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:25" (1/1) ... [2021-11-03 04:30:26,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:30:26,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:30:26,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:30:26,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:30:26,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:25" (1/1) ... [2021-11-03 04:30:26,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:30:26,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:30:26,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:30:26,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:30:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:30:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:30:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:30:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:30:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:30:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 04:30:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:30:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:30:26,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:30:26,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:30:26,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:30:26,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:30:35,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:30:35,531 INFO L299 CfgBuilder]: Removed 1075 assume(true) statements. [2021-11-03 04:30:35,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:30:35 BoogieIcfgContainer [2021-11-03 04:30:35,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:30:35,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:30:35,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:30:35,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:30:35,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:30:24" (1/3) ... [2021-11-03 04:30:35,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d05d6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:30:35, skipping insertion in model container [2021-11-03 04:30:35,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:25" (2/3) ... [2021-11-03 04:30:35,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d05d6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:30:35, skipping insertion in model container [2021-11-03 04:30:35,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:30:35" (3/3) ... [2021-11-03 04:30:35,553 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test9-2.i [2021-11-03 04:30:35,559 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:30:35,559 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1035 error locations. [2021-11-03 04:30:35,605 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:30:35,612 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 04:30:35,612 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1035 error locations. [2021-11-03 04:30:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 3069 states, 2033 states have (on average 2.06345302508608) internal successors, (4195), 3068 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states 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 04:30:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:30:35,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:35,700 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:30:35,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:30:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:35,706 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 04:30:35,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:35,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70955794] [2021-11-03 04:30:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:35,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:35,725 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:35,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:30:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:35,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:30:35,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:35,979 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 04:30:35,996 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 04:30:35,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:36,031 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 04:30:36,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:36,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70955794] [2021-11-03 04:30:36,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70955794] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:36,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:36,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:30:36,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082272541] [2021-11-03 04:30:36,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:30:36,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:36,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:30:36,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:30:36,070 INFO L87 Difference]: Start difference. First operand has 3069 states, 2033 states have (on average 2.06345302508608) internal successors, (4195), 3068 states have internal predecessors, (4195), 0 states have call successors, (0), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 04:30:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:38,635 INFO L93 Difference]: Finished difference Result 3233 states and 3800 transitions. [2021-11-03 04:30:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:30:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-03 04:30:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:38,676 INFO L225 Difference]: With dead ends: 3233 [2021-11-03 04:30:38,676 INFO L226 Difference]: Without dead ends: 3231 [2021-11-03 04:30:38,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:30:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2021-11-03 04:30:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 3053. [2021-11-03 04:30:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 2033 states have (on average 1.7766847024102312) internal successors, (3612), 3052 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states 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 04:30:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 3612 transitions. [2021-11-03 04:30:38,848 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 3612 transitions. Word has length 3 [2021-11-03 04:30:38,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:38,849 INFO L470 AbstractCegarLoop]: Abstraction has 3053 states and 3612 transitions. [2021-11-03 04:30:38,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 04:30:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 3612 transitions. [2021-11-03 04:30:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:30:38,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:38,850 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:30:38,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:39,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:39,063 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:30:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 04:30:39,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:39,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839433751] [2021-11-03 04:30:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:39,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:39,076 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:39,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:30:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:39,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:30:39,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:39,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:30:39,255 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 04:30:39,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:39,339 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 04:30:39,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:39,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839433751] [2021-11-03 04:30:39,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839433751] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:39,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:39,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:30:39,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658387060] [2021-11-03 04:30:39,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:30:39,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:30:39,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:30:39,343 INFO L87 Difference]: Start difference. First operand 3053 states and 3612 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 04:30:44,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:44,832 INFO L93 Difference]: Finished difference Result 5536 states and 6630 transitions. [2021-11-03 04:30:44,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:30:44,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 3 [2021-11-03 04:30:44,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:44,871 INFO L225 Difference]: With dead ends: 5536 [2021-11-03 04:30:44,871 INFO L226 Difference]: Without dead ends: 5536 [2021-11-03 04:30:44,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 04:30:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2021-11-03 04:30:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 3088. [2021-11-03 04:30:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 2077 states have (on average 1.7770823302840635) internal successors, (3691), 3087 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states 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 04:30:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 3691 transitions. [2021-11-03 04:30:45,004 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 3691 transitions. Word has length 3 [2021-11-03 04:30:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:45,005 INFO L470 AbstractCegarLoop]: Abstraction has 3088 states and 3691 transitions. [2021-11-03 04:30:45,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 04:30:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 3691 transitions. [2021-11-03 04:30:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:30:45,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:45,007 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:45,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:45,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:45,218 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:30:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 04:30:45,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:45,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473855679] [2021-11-03 04:30:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:45,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:45,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:45,223 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:45,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:30:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:30:45,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:45,377 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 04:30:45,402 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 04:30:45,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:45,430 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 04:30:45,431 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:45,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473855679] [2021-11-03 04:30:45,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473855679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:45,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:45,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:30:45,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460112673] [2021-11-03 04:30:45,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:30:45,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:45,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:30:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:30:45,440 INFO L87 Difference]: Start difference. First operand 3088 states and 3691 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 04:30:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:47,530 INFO L93 Difference]: Finished difference Result 5255 states and 6375 transitions. [2021-11-03 04:30:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:30:47,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:30:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:47,559 INFO L225 Difference]: With dead ends: 5255 [2021-11-03 04:30:47,559 INFO L226 Difference]: Without dead ends: 5255 [2021-11-03 04:30:47,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 04:30:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2021-11-03 04:30:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 3041. [2021-11-03 04:30:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3041 states, 2077 states have (on average 1.7530091478093404) internal successors, (3641), 3040 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states 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 04:30:47,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 3641 transitions. [2021-11-03 04:30:47,643 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 3641 transitions. Word has length 8 [2021-11-03 04:30:47,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:47,643 INFO L470 AbstractCegarLoop]: Abstraction has 3041 states and 3641 transitions. [2021-11-03 04:30:47,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 04:30:47,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 3641 transitions. [2021-11-03 04:30:47,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:30:47,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:47,645 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:47,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:47,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:47,860 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:30:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 04:30:47,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:47,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548752611] [2021-11-03 04:30:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:47,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:47,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:47,863 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:47,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:30:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:48,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:30:48,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:48,042 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 04:30:48,094 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 04:30:48,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:48,197 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 04:30:48,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:48,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548752611] [2021-11-03 04:30:48,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548752611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:48,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:48,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:30:48,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471030436] [2021-11-03 04:30:48,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:30:48,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:48,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:30:48,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:30:48,199 INFO L87 Difference]: Start difference. First operand 3041 states and 3641 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 04:30:52,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:52,088 INFO L93 Difference]: Finished difference Result 5285 states and 6369 transitions. [2021-11-03 04:30:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:30:52,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:30:52,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:52,119 INFO L225 Difference]: With dead ends: 5285 [2021-11-03 04:30:52,120 INFO L226 Difference]: Without dead ends: 5285 [2021-11-03 04:30:52,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 04:30:52,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5285 states. [2021-11-03 04:30:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5285 to 3031. [2021-11-03 04:30:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 2077 states have (on average 1.7467501203659124) internal successors, (3628), 3030 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states 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 04:30:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 3628 transitions. [2021-11-03 04:30:52,241 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 3628 transitions. Word has length 8 [2021-11-03 04:30:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:52,241 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 3628 transitions. [2021-11-03 04:30:52,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 04:30:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 3628 transitions. [2021-11-03 04:30:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:30:52,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:52,243 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:52,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:52,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:52,454 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr929REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:30:52,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:52,455 INFO L85 PathProgramCache]: Analyzing trace with hash -939366184, now seen corresponding path program 1 times [2021-11-03 04:30:52,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:52,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978888342] [2021-11-03 04:30:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:52,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:52,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:52,458 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:52,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:30:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:52,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:30:52,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:52,694 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 04:30:52,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:52,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:52,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978888342] [2021-11-03 04:30:52,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978888342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:52,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:52,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:30:52,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392330444] [2021-11-03 04:30:52,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:30:52,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:52,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:30:52,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:30:52,781 INFO L87 Difference]: Start difference. First operand 3031 states and 3628 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:53,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:53,188 INFO L93 Difference]: Finished difference Result 5494 states and 6625 transitions. [2021-11-03 04:30:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:30:53,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 04:30:53,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:53,224 INFO L225 Difference]: With dead ends: 5494 [2021-11-03 04:30:53,225 INFO L226 Difference]: Without dead ends: 5494 [2021-11-03 04:30:53,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 04:30:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5494 states. [2021-11-03 04:30:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5494 to 4201. [2021-11-03 04:30:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4201 states, 3247 states have (on average 1.823221435170927) internal successors, (5920), 4200 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states 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 04:30:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4201 states to 4201 states and 5920 transitions. [2021-11-03 04:30:53,338 INFO L78 Accepts]: Start accepts. Automaton has 4201 states and 5920 transitions. Word has length 11 [2021-11-03 04:30:53,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:53,339 INFO L470 AbstractCegarLoop]: Abstraction has 4201 states and 5920 transitions. [2021-11-03 04:30:53,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:53,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4201 states and 5920 transitions. [2021-11-03 04:30:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:30:53,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:53,340 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:53,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:53,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:53,556 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:30:53,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:53,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1258779124, now seen corresponding path program 1 times [2021-11-03 04:30:53,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:53,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226827942] [2021-11-03 04:30:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:53,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:53,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:53,559 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:53,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:30:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:53,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:30:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:53,752 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 04:30:53,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:53,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:53,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226827942] [2021-11-03 04:30:53,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226827942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:53,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:53,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:30:53,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448659855] [2021-11-03 04:30:53,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:30:53,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:30:53,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:30:53,782 INFO L87 Difference]: Start difference. First operand 4201 states and 5920 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:53,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:53,836 INFO L93 Difference]: Finished difference Result 4355 states and 6060 transitions. [2021-11-03 04:30:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:30:53,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 04:30:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:53,870 INFO L225 Difference]: With dead ends: 4355 [2021-11-03 04:30:53,871 INFO L226 Difference]: Without dead ends: 4355 [2021-11-03 04:30:53,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 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 04:30:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2021-11-03 04:30:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 4141. [2021-11-03 04:30:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4141 states, 3211 states have (on average 1.816879476798505) internal successors, (5834), 4140 states have internal predecessors, (5834), 0 states have call successors, (0), 0 states 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 04:30:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4141 states to 4141 states and 5834 transitions. [2021-11-03 04:30:53,968 INFO L78 Accepts]: Start accepts. Automaton has 4141 states and 5834 transitions. Word has length 13 [2021-11-03 04:30:53,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:53,969 INFO L470 AbstractCegarLoop]: Abstraction has 4141 states and 5834 transitions. [2021-11-03 04:30:53,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4141 states and 5834 transitions. [2021-11-03 04:30:53,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 04:30:53,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:53,970 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:53,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:54,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:54,183 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr931REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:30:54,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:54,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1362482859, now seen corresponding path program 1 times [2021-11-03 04:30:54,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:54,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424188211] [2021-11-03 04:30:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:54,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:54,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:54,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:54,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:30:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:54,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:30:54,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:54,452 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 04:30:54,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:54,548 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 04:30:54,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:54,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424188211] [2021-11-03 04:30:54,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424188211] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:54,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:54,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:30:54,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493595693] [2021-11-03 04:30:54,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:30:54,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:54,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:30:54,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:30:54,551 INFO L87 Difference]: Start difference. First operand 4141 states and 5834 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states 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 04:30:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:55,292 INFO L93 Difference]: Finished difference Result 5412 states and 6541 transitions. [2021-11-03 04:30:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:30:55,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 04:30:55,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:55,306 INFO L225 Difference]: With dead ends: 5412 [2021-11-03 04:30:55,307 INFO L226 Difference]: Without dead ends: 5412 [2021-11-03 04:30:55,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 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 04:30:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5412 states. [2021-11-03 04:30:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5412 to 4143. [2021-11-03 04:30:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4143 states, 3213 states have (on average 1.816370992841581) internal successors, (5836), 4142 states have internal predecessors, (5836), 0 states have call successors, (0), 0 states 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 04:30:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 5836 transitions. [2021-11-03 04:30:55,413 INFO L78 Accepts]: Start accepts. Automaton has 4143 states and 5836 transitions. Word has length 14 [2021-11-03 04:30:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:55,413 INFO L470 AbstractCegarLoop]: Abstraction has 4143 states and 5836 transitions. [2021-11-03 04:30:55,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states 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 04:30:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4143 states and 5836 transitions. [2021-11-03 04:30:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 04:30:55,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:55,415 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:55,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:55,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:55,627 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1034ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:30:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1362489641, now seen corresponding path program 1 times [2021-11-03 04:30:55,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:55,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834616739] [2021-11-03 04:30:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:55,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:55,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:55,629 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:55,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:30:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:55,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:30:55,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:55,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:55,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:55,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:55,956 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 04:30:55,956 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 04:30:56,023 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 04:30:56,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-03 04:30:56,064 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 04:30:56,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:56,142 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 04:30:56,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:56,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834616739] [2021-11-03 04:30:56,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834616739] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:56,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:56,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:30:56,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874050265] [2021-11-03 04:30:56,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:30:56,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:56,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:30:56,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:30:56,144 INFO L87 Difference]: Start difference. First operand 4143 states and 5836 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:58,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:58,759 INFO L93 Difference]: Finished difference Result 7460 states and 10684 transitions. [2021-11-03 04:30:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:30:58,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 04:30:58,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:58,775 INFO L225 Difference]: With dead ends: 7460 [2021-11-03 04:30:58,776 INFO L226 Difference]: Without dead ends: 7460 [2021-11-03 04:30:58,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:30:58,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7460 states. [2021-11-03 04:30:58,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7460 to 4142. [2021-11-03 04:30:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4142 states, 3212 states have (on average 1.8163138231631382) internal successors, (5834), 4141 states have internal predecessors, (5834), 0 states have call successors, (0), 0 states 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 04:30:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4142 states to 4142 states and 5834 transitions. [2021-11-03 04:30:58,864 INFO L78 Accepts]: Start accepts. Automaton has 4142 states and 5834 transitions. Word has length 14 [2021-11-03 04:30:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:58,865 INFO L470 AbstractCegarLoop]: Abstraction has 4142 states and 5834 transitions. [2021-11-03 04:30:58,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:58,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4142 states and 5834 transitions. [2021-11-03 04:30:58,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 04:30:58,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:58,867 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:58,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:59,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:59,086 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:30:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:59,086 INFO L85 PathProgramCache]: Analyzing trace with hash -520774338, now seen corresponding path program 1 times [2021-11-03 04:30:59,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:59,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537371950] [2021-11-03 04:30:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:59,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:59,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:59,088 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:59,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:30:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:59,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:30:59,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:59,320 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 04:30:59,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:59,362 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 04:30:59,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:59,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537371950] [2021-11-03 04:30:59,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537371950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:59,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:59,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:30:59,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830996441] [2021-11-03 04:30:59,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:30:59,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:30:59,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:30:59,365 INFO L87 Difference]: Start difference. First operand 4142 states and 5834 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 04:30:59,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:59,450 INFO L93 Difference]: Finished difference Result 4082 states and 5748 transitions. [2021-11-03 04:30:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:30:59,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 18 [2021-11-03 04:30:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:59,460 INFO L225 Difference]: With dead ends: 4082 [2021-11-03 04:30:59,460 INFO L226 Difference]: Without dead ends: 4082 [2021-11-03 04:30:59,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 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 04:30:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-11-03 04:30:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 4082. [2021-11-03 04:30:59,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4082 states, 3176 states have (on average 1.809823677581864) internal successors, (5748), 4081 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states 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 04:30:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4082 states to 4082 states and 5748 transitions. [2021-11-03 04:30:59,525 INFO L78 Accepts]: Start accepts. Automaton has 4082 states and 5748 transitions. Word has length 18 [2021-11-03 04:30:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:59,525 INFO L470 AbstractCegarLoop]: Abstraction has 4082 states and 5748 transitions. [2021-11-03 04:30:59,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 04:30:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 4082 states and 5748 transitions. [2021-11-03 04:30:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:30:59,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:59,526 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:59,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:59,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:59,738 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:30:59,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:59,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2047030904, now seen corresponding path program 1 times [2021-11-03 04:30:59,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:59,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407028247] [2021-11-03 04:30:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:59,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:59,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:59,741 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:59,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:30:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:59,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:30:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:00,001 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 04:31:00,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:00,055 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 04:31:00,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:00,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407028247] [2021-11-03 04:31:00,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407028247] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:00,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:00,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:31:00,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802965137] [2021-11-03 04:31:00,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:31:00,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:00,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:31:00,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:31:00,058 INFO L87 Difference]: Start difference. First operand 4082 states and 5748 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 04:31:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:00,178 INFO L93 Difference]: Finished difference Result 4054 states and 5692 transitions. [2021-11-03 04:31:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:31:00,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 04:31:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:00,188 INFO L225 Difference]: With dead ends: 4054 [2021-11-03 04:31:00,188 INFO L226 Difference]: Without dead ends: 4054 [2021-11-03 04:31:00,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 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 04:31:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2021-11-03 04:31:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 4052. [2021-11-03 04:31:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4052 states, 3160 states have (on average 1.8006329113924051) internal successors, (5690), 4051 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states 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 04:31:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4052 states to 4052 states and 5690 transitions. [2021-11-03 04:31:00,249 INFO L78 Accepts]: Start accepts. Automaton has 4052 states and 5690 transitions. Word has length 20 [2021-11-03 04:31:00,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:00,250 INFO L470 AbstractCegarLoop]: Abstraction has 4052 states and 5690 transitions. [2021-11-03 04:31:00,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 04:31:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4052 states and 5690 transitions. [2021-11-03 04:31:00,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 04:31:00,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:00,251 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] [2021-11-03 04:31:00,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:00,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:00,463 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:31:00,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589690, now seen corresponding path program 1 times [2021-11-03 04:31:00,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:00,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175964603] [2021-11-03 04:31:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:00,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:00,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:00,466 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:00,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:31:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:00,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:31:00,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:00,675 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 04:31:00,809 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 04:31:00,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:00,957 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 04:31:00,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:00,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175964603] [2021-11-03 04:31:00,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175964603] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:00,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:00,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:31:00,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195236327] [2021-11-03 04:31:00,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:31:00,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:00,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:31:00,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:00,960 INFO L87 Difference]: Start difference. First operand 4052 states and 5690 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:03,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:03,323 INFO L93 Difference]: Finished difference Result 7487 states and 10689 transitions. [2021-11-03 04:31:03,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:31:03,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 04:31:03,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:03,341 INFO L225 Difference]: With dead ends: 7487 [2021-11-03 04:31:03,342 INFO L226 Difference]: Without dead ends: 7487 [2021-11-03 04:31:03,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 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 04:31:03,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7487 states. [2021-11-03 04:31:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7487 to 4048. [2021-11-03 04:31:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4048 states, 3160 states have (on average 1.7981012658227848) internal successors, (5682), 4047 states have internal predecessors, (5682), 0 states have call successors, (0), 0 states 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 04:31:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4048 states to 4048 states and 5682 transitions. [2021-11-03 04:31:03,450 INFO L78 Accepts]: Start accepts. Automaton has 4048 states and 5682 transitions. Word has length 34 [2021-11-03 04:31:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:03,453 INFO L470 AbstractCegarLoop]: Abstraction has 4048 states and 5682 transitions. [2021-11-03 04:31:03,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4048 states and 5682 transitions. [2021-11-03 04:31:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 04:31:03,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:03,458 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] [2021-11-03 04:31:03,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:03,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:03,671 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:31:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589689, now seen corresponding path program 1 times [2021-11-03 04:31:03,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:03,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062446510] [2021-11-03 04:31:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:03,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:03,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:03,673 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:03,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:31:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:31:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:03,890 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 04:31:04,191 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 04:31:04,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:04,727 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 04:31:04,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:04,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062446510] [2021-11-03 04:31:04,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062446510] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:04,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:04,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:31:04,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593605535] [2021-11-03 04:31:04,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:31:04,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:04,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:31:04,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:31:04,729 INFO L87 Difference]: Start difference. First operand 4048 states and 5682 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 04:31:11,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:11,710 INFO L93 Difference]: Finished difference Result 7541 states and 10706 transitions. [2021-11-03 04:31:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:31:11,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 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 34 [2021-11-03 04:31:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:11,728 INFO L225 Difference]: With dead ends: 7541 [2021-11-03 04:31:11,728 INFO L226 Difference]: Without dead ends: 7541 [2021-11-03 04:31:11,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:31:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7541 states. [2021-11-03 04:31:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7541 to 4044. [2021-11-03 04:31:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 3160 states have (on average 1.7955696202531646) internal successors, (5674), 4043 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states 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 04:31:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 5674 transitions. [2021-11-03 04:31:11,854 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 5674 transitions. Word has length 34 [2021-11-03 04:31:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:11,855 INFO L470 AbstractCegarLoop]: Abstraction has 4044 states and 5674 transitions. [2021-11-03 04:31:11,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 04:31:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 5674 transitions. [2021-11-03 04:31:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 04:31:11,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:11,857 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] [2021-11-03 04:31:11,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:12,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:12,071 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:31:12,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:12,071 INFO L85 PathProgramCache]: Analyzing trace with hash -489765179, now seen corresponding path program 1 times [2021-11-03 04:31:12,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:12,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405135351] [2021-11-03 04:31:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:12,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:12,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:12,074 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:12,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:31:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:31:12,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:12,535 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 04:31:12,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:12,699 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 04:31:12,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:12,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405135351] [2021-11-03 04:31:12,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405135351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:12,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:12,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:31:12,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661628718] [2021-11-03 04:31:12,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:31:12,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:12,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:31:12,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:12,704 INFO L87 Difference]: Start difference. First operand 4044 states and 5674 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 04:31:12,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:12,799 INFO L93 Difference]: Finished difference Result 4032 states and 5654 transitions. [2021-11-03 04:31:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:31:12,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 52 [2021-11-03 04:31:12,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:12,806 INFO L225 Difference]: With dead ends: 4032 [2021-11-03 04:31:12,806 INFO L226 Difference]: Without dead ends: 4032 [2021-11-03 04:31:12,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 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 04:31:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4032 states. [2021-11-03 04:31:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4032 to 4032. [2021-11-03 04:31:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4032 states, 3148 states have (on average 1.7960609911054637) internal successors, (5654), 4031 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states 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 04:31:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4032 states to 4032 states and 5654 transitions. [2021-11-03 04:31:12,872 INFO L78 Accepts]: Start accepts. Automaton has 4032 states and 5654 transitions. Word has length 52 [2021-11-03 04:31:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:12,874 INFO L470 AbstractCegarLoop]: Abstraction has 4032 states and 5654 transitions. [2021-11-03 04:31:12,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 04:31:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4032 states and 5654 transitions. [2021-11-03 04:31:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:31:12,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:12,878 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 04:31:12,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:13,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:13,100 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:31:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:13,101 INFO L85 PathProgramCache]: Analyzing trace with hash -531678063, now seen corresponding path program 1 times [2021-11-03 04:31:13,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:13,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206423580] [2021-11-03 04:31:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:13,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:13,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:13,104 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:13,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:31:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:13,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:31:13,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:13,658 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 04:31:13,669 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 04:31:14,458 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 04:31:14,459 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 30 treesize of output 32 [2021-11-03 04:31:14,466 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 04:31:14,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-11-03 04:31:14,501 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 04:31:14,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:19,866 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 04:31:19,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:19,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206423580] [2021-11-03 04:31:19,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206423580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:19,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:19,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:31:19,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346583393] [2021-11-03 04:31:19,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:31:19,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:31:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 04:31:19,869 INFO L87 Difference]: Start difference. First operand 4032 states and 5654 transitions. Second operand has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 04:31:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:33,198 INFO L93 Difference]: Finished difference Result 7235 states and 10415 transitions. [2021-11-03 04:31:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:31:33,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 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 04:31:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:33,209 INFO L225 Difference]: With dead ends: 7235 [2021-11-03 04:31:33,209 INFO L226 Difference]: Without dead ends: 7235 [2021-11-03 04:31:33,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 04:31:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7235 states. [2021-11-03 04:31:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7235 to 3994. [2021-11-03 04:31:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3994 states, 3148 states have (on average 1.7839898348157561) internal successors, (5616), 3993 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states 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 04:31:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3994 states to 3994 states and 5616 transitions. [2021-11-03 04:31:33,327 INFO L78 Accepts]: Start accepts. Automaton has 3994 states and 5616 transitions. Word has length 60 [2021-11-03 04:31:33,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:33,328 INFO L470 AbstractCegarLoop]: Abstraction has 3994 states and 5616 transitions. [2021-11-03 04:31:33,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 04:31:33,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3994 states and 5616 transitions. [2021-11-03 04:31:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 04:31:33,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:33,330 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:33,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:33,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:33,549 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:31:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:33,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1426362414, now seen corresponding path program 1 times [2021-11-03 04:31:33,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:33,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071188314] [2021-11-03 04:31:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:33,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:33,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:33,553 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:33,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:31:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:33,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:31:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:34,104 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 04:31:34,125 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 24 treesize of output 20 [2021-11-03 04:31:34,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-03 04:31:34,221 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 04:31:34,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:34,426 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 04:31:34,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:34,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071188314] [2021-11-03 04:31:34,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071188314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:34,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:34,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:31:34,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956393283] [2021-11-03 04:31:34,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:31:34,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:34,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:31:34,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:31:34,428 INFO L87 Difference]: Start difference. First operand 3994 states and 5616 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:39,772 INFO L93 Difference]: Finished difference Result 7626 states and 10821 transitions. [2021-11-03 04:31:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:31:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 04:31:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:39,784 INFO L225 Difference]: With dead ends: 7626 [2021-11-03 04:31:39,784 INFO L226 Difference]: Without dead ends: 7626 [2021-11-03 04:31:39,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:31:39,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-11-03 04:31:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 3993. [2021-11-03 04:31:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3148 states have (on average 1.7836721728081322) internal successors, (5615), 3992 states have internal predecessors, (5615), 0 states have call successors, (0), 0 states 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 04:31:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 5615 transitions. [2021-11-03 04:31:39,859 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 5615 transitions. Word has length 66 [2021-11-03 04:31:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:39,860 INFO L470 AbstractCegarLoop]: Abstraction has 3993 states and 5615 transitions. [2021-11-03 04:31:39,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 5615 transitions. [2021-11-03 04:31:39,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 04:31:39,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:39,861 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:39,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:40,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:40,075 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:31:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:40,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1267561538, now seen corresponding path program 1 times [2021-11-03 04:31:40,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:40,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534797783] [2021-11-03 04:31:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:40,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:40,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:40,077 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:40,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:31:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:40,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:31:40,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:40,638 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 04:31:40,670 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 04:31:40,681 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 04:31:40,758 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 04:31:40,763 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 04:31:40,839 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 04:31:40,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:41,290 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 04:31:41,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:41,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534797783] [2021-11-03 04:31:41,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534797783] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:41,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:41,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:31:41,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405641412] [2021-11-03 04:31:41,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:31:41,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:41,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:31:41,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:31:41,293 INFO L87 Difference]: Start difference. First operand 3993 states and 5615 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 04:31:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:55,355 INFO L93 Difference]: Finished difference Result 7477 states and 10635 transitions. [2021-11-03 04:31:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:31:55,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 04:31:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:55,368 INFO L225 Difference]: With dead ends: 7477 [2021-11-03 04:31:55,369 INFO L226 Difference]: Without dead ends: 7477 [2021-11-03 04:31:55,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:31:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7477 states. [2021-11-03 04:31:55,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7477 to 3992. [2021-11-03 04:31:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 3148 states have (on average 1.7833545108005082) internal successors, (5614), 3991 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states 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 04:31:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 5614 transitions. [2021-11-03 04:31:55,479 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 5614 transitions. Word has length 67 [2021-11-03 04:31:55,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:55,479 INFO L470 AbstractCegarLoop]: Abstraction has 3992 states and 5614 transitions. [2021-11-03 04:31:55,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 04:31:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 5614 transitions. [2021-11-03 04:31:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:31:55,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:55,480 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:55,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:55,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:55,694 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:31:55,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:55,695 INFO L85 PathProgramCache]: Analyzing trace with hash -582276570, now seen corresponding path program 1 times [2021-11-03 04:31:55,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:55,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317739686] [2021-11-03 04:31:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:55,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:55,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:55,697 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:55,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:31:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:56,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:31:56,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:56,465 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 04:31:56,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:56,592 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 04:31:56,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:56,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317739686] [2021-11-03 04:31:56,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317739686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:56,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:56,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:31:56,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040432371] [2021-11-03 04:31:56,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:31:56,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:56,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:31:56,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:31:56,594 INFO L87 Difference]: Start difference. First operand 3992 states and 5614 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:56,772 INFO L93 Difference]: Finished difference Result 7635 states and 10829 transitions. [2021-11-03 04:31:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:31:56,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:31:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:56,780 INFO L225 Difference]: With dead ends: 7635 [2021-11-03 04:31:56,780 INFO L226 Difference]: Without dead ends: 7635 [2021-11-03 04:31:56,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 136 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 04:31:56,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7635 states. [2021-11-03 04:31:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7635 to 3995. [2021-11-03 04:31:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3995 states, 3151 states have (on average 1.7826086956521738) internal successors, (5617), 3994 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states 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 04:31:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3995 states to 3995 states and 5617 transitions. [2021-11-03 04:31:56,846 INFO L78 Accepts]: Start accepts. Automaton has 3995 states and 5617 transitions. Word has length 71 [2021-11-03 04:31:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:56,846 INFO L470 AbstractCegarLoop]: Abstraction has 3995 states and 5617 transitions. [2021-11-03 04:31:56,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3995 states and 5617 transitions. [2021-11-03 04:31:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:31:56,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:56,847 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:56,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:57,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:57,062 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:31:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:57,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1283072730, now seen corresponding path program 1 times [2021-11-03 04:31:57,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:57,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193403007] [2021-11-03 04:31:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:57,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:57,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:57,064 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:57,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:31:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:31:57,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:57,809 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 04:31:57,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:58,050 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 04:31:58,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:58,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193403007] [2021-11-03 04:31:58,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193403007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:58,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [522939236] [2021-11-03 04:31:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:58,051 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:31:58,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:31:58,059 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:31:58,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 04:31:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:58,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:31:58,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:58,946 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 04:31:58,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:59,070 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 04:31:59,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [522939236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:59,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867106617] [2021-11-03 04:31:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:59,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:31:59,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:31:59,072 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:31:59,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 04:31:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:59,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:31:59,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:59,838 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 04:31:59,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:59,978 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 04:31:59,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867106617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:59,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:31:59,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 04:31:59,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581459197] [2021-11-03 04:31:59,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:31:59,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:59,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:31:59,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:31:59,981 INFO L87 Difference]: Start difference. First operand 3995 states and 5617 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 04:32:00,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:00,524 INFO L93 Difference]: Finished difference Result 7641 states and 10835 transitions. [2021-11-03 04:32:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:32:00,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 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 73 [2021-11-03 04:32:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:00,532 INFO L225 Difference]: With dead ends: 7641 [2021-11-03 04:32:00,532 INFO L226 Difference]: Without dead ends: 7641 [2021-11-03 04:32:00,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 424 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 04:32:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7641 states. [2021-11-03 04:32:00,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7641 to 4001. [2021-11-03 04:32:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4001 states, 3157 states have (on average 1.7811213177066836) internal successors, (5623), 4000 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states 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 04:32:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 5623 transitions. [2021-11-03 04:32:00,587 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 5623 transitions. Word has length 73 [2021-11-03 04:32:00,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:00,587 INFO L470 AbstractCegarLoop]: Abstraction has 4001 states and 5623 transitions. [2021-11-03 04:32:00,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 04:32:00,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 5623 transitions. [2021-11-03 04:32:00,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 04:32:00,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:00,588 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:00,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:00,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:01,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:01,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:32:01,199 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:32:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:01,199 INFO L85 PathProgramCache]: Analyzing trace with hash -376896730, now seen corresponding path program 2 times [2021-11-03 04:32:01,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:01,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872214162] [2021-11-03 04:32:01,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:32:01,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:01,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:01,201 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:01,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:32:01,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:32:01,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:32:01,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:32:02,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:02,347 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 04:32:02,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:02,847 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 04:32:02,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:02,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872214162] [2021-11-03 04:32:02,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872214162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:32:02,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [98929373] [2021-11-03 04:32:02,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:32:02,848 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:32:02,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:32:02,848 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:32:02,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 04:32:04,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:32:04,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:32:04,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:32:04,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:04,581 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 04:32:04,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:04,742 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 04:32:04,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [98929373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:32:04,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725468249] [2021-11-03 04:32:04,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:32:04,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:32:04,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:32:04,744 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:32:04,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-03 04:32:40,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:32:40,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:32:40,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 04:32:40,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:41,064 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 04:32:41,065 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 17 treesize of output 17 [2021-11-03 04:32:41,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:32:41,153 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 23 treesize of output 19 [2021-11-03 04:32:41,165 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 04:32:41,566 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-03 04:32:41,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-11-03 04:32:41,596 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 04:32:41,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-03 04:32:45,655 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 04:32:45,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 04:32:45,713 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 04:32:45,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 04:32:47,442 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 04:32:47,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 04:32:50,236 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 04:32:50,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 04:32:50,499 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 04:32:50,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 04:32:52,595 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 04:32:52,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 04:32:53,854 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 04:32:53,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 04:32:54,396 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 04:32:54,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 04:32:54,676 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 04:32:54,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 78 [2021-11-03 04:32:55,415 INFO L354 Elim1Store]: treesize reduction 104, result has 19.4 percent of original size [2021-11-03 04:32:55,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 101 [2021-11-03 04:32:55,860 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 04:32:55,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 62 [2021-11-03 04:32:55,878 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 04:32:55,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2021-11-03 04:32:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 04:32:55,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:18,314 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_subst_4 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) |c_ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse1) (bvadd v_subst_4 |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse1))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))) (bvule (bvadd (_ bv16 32) .cse0) (bvadd .cse0 (_ bv20 32))))) (forall ((v_subst_3 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32))) (let ((.cse2 (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse4 (bvadd v_subst_3 |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse5 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (let ((.cse3 ((_ zero_extend 24) ((_ extract 7 0) |c_ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse2 .cse3) .cse4 .cse3))) c_ULTIMATE.start_main_~user~0.base) .cse5) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse2 (_ bv0 32)) .cse4 (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse5)))))) is different from false [2021-11-03 04:33:20,459 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_subst_6 (_ BitVec 32)) (v_subst_3 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32))) (let ((.cse0 (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse2 (bvadd v_subst_6 |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse3 (bvadd v_subst_3 |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse4 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (bvule (bvadd (_ bv20 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) |c_ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse0 .cse1) .cse2 .cse1) .cse3 .cse1))) c_ULTIMATE.start_main_~user~0.base) .cse4)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse0 (_ bv0 32)) .cse2 (_ bv0 32)) .cse3 (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse4))))) (forall ((v_subst_5 (_ BitVec 32)) (v_subst_4 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32))) (let ((.cse5 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (let ((.cse6 ((_ zero_extend 24) ((_ extract 7 0) |c_ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse6) (bvadd v_subst_5 |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse6) (bvadd v_subst_4 |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse6))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))) (bvule (bvadd (_ bv16 32) .cse5) (bvadd .cse5 (_ bv20 32)))))) is different from false [2021-11-03 04:34:01,831 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_subst_6 (_ BitVec 32)) (v_subst_3 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32)) (v_subst_9 (_ BitVec 32)) (v_subst_8 (_ BitVec 32))) (let ((.cse7 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~user~0.base) .cse7)) (.cse1 (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse3 (bvadd v_subst_9 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse4 (bvadd v_subst_8 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse5 (bvadd v_subst_6 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse6 (bvadd v_subst_3 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 (let ((.cse2 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (store (store (store (select |c_#memory_$Pointer$.offset| .cse0) .cse1 .cse2) .cse3 .cse2) .cse4 .cse2) .cse5 .cse2) .cse6 .cse2))) c_ULTIMATE.start_main_~user~0.base) .cse7) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 (store (store (store (store (store (select |c_#memory_$Pointer$.base| .cse0) .cse1 (_ bv0 32)) .cse3 (_ bv0 32)) .cse4 (_ bv0 32)) .cse5 (_ bv0 32)) .cse6 (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse7)))))) (forall ((v_subst_5 (_ BitVec 32)) (v_subst_4 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32)) (v_subst_10 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32)) (v_subst_7 (_ BitVec 32))) (let ((.cse8 (let ((.cse11 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (select (select (let ((.cse9 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~user~0.base) .cse11))) (store |c_#memory_$Pointer$.offset| .cse9 (let ((.cse10 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (store (store (store (select |c_#memory_$Pointer$.offset| .cse9) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse10) (bvadd v_subst_10 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse10) (bvadd v_subst_7 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse10) (bvadd v_subst_5 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse10) (bvadd v_subst_4 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse10)))) c_ULTIMATE.start_main_~user~0.base) .cse11)))) (bvule (bvadd (_ bv16 32) .cse8) (bvadd .cse8 (_ bv20 32)))))) is different from false [2021-11-03 04:34:04,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-03 04:34:04,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-11-03 04:34:04,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 18 [2021-11-03 04:34:04,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997835584] [2021-11-03 04:34:04,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 04:34:04,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:04,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 04:34:04,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=841, Unknown=8, NotChecked=186, Total=1190 [2021-11-03 04:34:04,440 INFO L87 Difference]: Start difference. First operand 4001 states and 5623 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 04:34:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:07,412 INFO L93 Difference]: Finished difference Result 7653 states and 10847 transitions. [2021-11-03 04:34:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 04:34:07,413 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 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 77 [2021-11-03 04:34:07,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:07,419 INFO L225 Difference]: With dead ends: 7653 [2021-11-03 04:34:07,419 INFO L226 Difference]: Without dead ends: 7653 [2021-11-03 04:34:07,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 359 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 67.5s TimeCoverageRelationStatistics Valid=428, Invalid=1646, Unknown=8, NotChecked=270, Total=2352 [2021-11-03 04:34:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7653 states. [2021-11-03 04:34:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7653 to 4013. [2021-11-03 04:34:07,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4013 states, 3169 states have (on average 1.77816345850426) internal successors, (5635), 4012 states have internal predecessors, (5635), 0 states have call successors, (0), 0 states 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 04:34:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4013 states to 4013 states and 5635 transitions. [2021-11-03 04:34:07,465 INFO L78 Accepts]: Start accepts. Automaton has 4013 states and 5635 transitions. Word has length 77 [2021-11-03 04:34:07,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:07,466 INFO L470 AbstractCegarLoop]: Abstraction has 4013 states and 5635 transitions. [2021-11-03 04:34:07,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 04:34:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4013 states and 5635 transitions. [2021-11-03 04:34:07,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 04:34:07,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:07,466 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:07,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:07,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-03 04:34:07,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:08,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:34:08,085 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1031 more)] === [2021-11-03 04:34:08,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:08,085 INFO L85 PathProgramCache]: Analyzing trace with hash 688279334, now seen corresponding path program 3 times [2021-11-03 04:34:08,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:08,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492137830] [2021-11-03 04:34:08,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:34:08,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:08,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:08,087 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:08,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:34:09,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 04:34:09,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:34:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:34:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:10,332 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 04:34:10,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:12,136 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 04:34:12,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:12,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492137830] [2021-11-03 04:34:12,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492137830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:12,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1047982056] [2021-11-03 04:34:12,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:34:12,137 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:12,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:34:12,137 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:34:12,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-03 04:34:15,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 04:34:15,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:34:15,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 04:34:15,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:15,486 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 04:34:15,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:19,424 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 04:34:19,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1047982056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:19,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159915555] [2021-11-03 04:34:19,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:34:19,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:34:19,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:34:19,426 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:34:19,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e970574b-0e45-47e5-912f-416c947c0fe6/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process