./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:19:23,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:19:23,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:19:23,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:19:23,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:19:23,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:19:23,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:19:23,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:19:23,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:19:23,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:19:23,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:19:23,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:19:23,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:19:23,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:19:23,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:19:23,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:19:23,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:19:23,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:19:23,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:19:23,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:19:23,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:19:23,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:19:23,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:19:23,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:19:23,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:19:23,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:19:23,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:19:23,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:19:23,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:19:23,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:19:23,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:19:23,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:19:23,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:19:23,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:19:23,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:19:23,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:19:23,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:19:23,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:19:23,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:19:23,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:19:23,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:19:23,615 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 02:19:23,666 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:19:23,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:19:23,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:19:23,668 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:19:23,669 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:19:23,669 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:19:23,669 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:19:23,669 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:19:23,670 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:19:23,670 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:19:23,671 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:19:23,671 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:19:23,672 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:19:23,672 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:19:23,672 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:19:23,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:19:23,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:19:23,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:19:23,674 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:19:23,674 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:19:23,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:19:23,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:19:23,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:19:23,675 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:19:23,675 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:19:23,675 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:19:23,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:19:23,677 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:19:23,677 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:19:23,678 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:19:23,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:19:23,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:19:23,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:19:23,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:19:23,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:19:23,679 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:19:23,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:19:23,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:19:23,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:19:23,680 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_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae [2021-11-07 02:19:23,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:19:24,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:19:24,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:19:24,025 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:19:24,026 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:19:24,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2021-11-07 02:19:24,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/data/52932b992/130c644d285347059dc3e3327aeb9318/FLAG344970147 [2021-11-07 02:19:24,730 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:19:24,733 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2021-11-07 02:19:24,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/data/52932b992/130c644d285347059dc3e3327aeb9318/FLAG344970147 [2021-11-07 02:19:24,922 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/data/52932b992/130c644d285347059dc3e3327aeb9318 [2021-11-07 02:19:24,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:19:24,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:19:24,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:19:24,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:19:24,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:19:24,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:19:24" (1/1) ... [2021-11-07 02:19:24,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c8ec177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24, skipping insertion in model container [2021-11-07 02:19:24,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:19:24" (1/1) ... [2021-11-07 02:19:24,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:19:25,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:19:25,597 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_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2021-11-07 02:19:25,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:19:25,895 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:19:25,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b9e4480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:25, skipping insertion in model container [2021-11-07 02:19:25,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:19:25,896 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:19:25,898 INFO L168 Benchmark]: Toolchain (without parser) took 966.89 ms. Allocated memory is still 96.5 MB. Free memory was 62.2 MB in the beginning and 52.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:19:25,899 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory is still 51.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:19:25,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 963.89 ms. Allocated memory is still 96.5 MB. Free memory was 62.0 MB in the beginning and 52.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:19:25,901 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory is still 51.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 963.89 ms. Allocated memory is still 96.5 MB. Free memory was 62.0 MB in the beginning and 52.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:19:28,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:19:28,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:19:28,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:19:28,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:19:28,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:19:28,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:19:28,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:19:28,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:19:28,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:19:28,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:19:28,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:19:28,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:19:28,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:19:28,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:19:28,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:19:28,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:19:28,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:19:28,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:19:28,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:19:28,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:19:28,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:19:28,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:19:28,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:19:28,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:19:28,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:19:28,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:19:28,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:19:28,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:19:28,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:19:28,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:19:28,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:19:28,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:19:28,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:19:28,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:19:28,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:19:28,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:19:28,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:19:28,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:19:28,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:19:28,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:19:28,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 02:19:28,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:19:28,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:19:28,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:19:28,151 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:19:28,152 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:19:28,152 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:19:28,152 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:19:28,152 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:19:28,152 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:19:28,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:19:28,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:19:28,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:19:28,155 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:19:28,155 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:19:28,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:19:28,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:19:28,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:19:28,156 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:19:28,156 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:19:28,157 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:19:28,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:19:28,157 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:19:28,157 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:19:28,157 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:19:28,158 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:19:28,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:19:28,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:19:28,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:19:28,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:19:28,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:19:28,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:19:28,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:19:28,160 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:19:28,160 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:28,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:19:28,160 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:19:28,161 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_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae [2021-11-07 02:19:28,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:19:28,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:19:28,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:19:28,620 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:19:28,626 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:19:28,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2021-11-07 02:19:28,710 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/data/6d1d37e29/970dc15077354342be58205b03026e9b/FLAGee66dbe0f [2021-11-07 02:19:29,423 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:19:29,423 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2021-11-07 02:19:29,443 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/data/6d1d37e29/970dc15077354342be58205b03026e9b/FLAGee66dbe0f [2021-11-07 02:19:29,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/data/6d1d37e29/970dc15077354342be58205b03026e9b [2021-11-07 02:19:29,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:19:29,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:19:29,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:19:29,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:19:29,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:19:29,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:19:29" (1/1) ... [2021-11-07 02:19:29,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2040fd78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:29, skipping insertion in model container [2021-11-07 02:19:29,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:19:29" (1/1) ... [2021-11-07 02:19:29,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:19:29,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:19:30,229 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_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2021-11-07 02:19:30,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:19:30,547 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:19:30,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:19:30,590 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_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2021-11-07 02:19:30,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:19:30,734 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:19:30,759 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_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2021-11-07 02:19:30,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:19:30,899 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:19:30,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:30 WrapperNode [2021-11-07 02:19:30,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:19:30,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:19:30,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:19:30,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:19:30,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:30" (1/1) ... [2021-11-07 02:19:30,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:30" (1/1) ... [2021-11-07 02:19:31,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:19:31,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:19:31,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:19:31,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:19:31,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:30" (1/1) ... [2021-11-07 02:19:31,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:30" (1/1) ... [2021-11-07 02:19:31,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:30" (1/1) ... [2021-11-07 02:19:31,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:30" (1/1) ... [2021-11-07 02:19:31,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:30" (1/1) ... [2021-11-07 02:19:31,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:30" (1/1) ... [2021-11-07 02:19:31,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:30" (1/1) ... [2021-11-07 02:19:31,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:19:31,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:19:31,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:19:31,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:19:31,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:30" (1/1) ... [2021-11-07 02:19:31,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:19:31,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:19:31,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:19:31,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:19:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:19:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:19:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:19:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:19:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:19:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 02:19:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:19:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:19:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:19:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:19:31,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:19:31,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:19:42,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:19:42,570 INFO L299 CfgBuilder]: Removed 224 assume(true) statements. [2021-11-07 02:19:42,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:19:42 BoogieIcfgContainer [2021-11-07 02:19:42,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:19:42,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:19:42,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:19:42,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:19:42,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:19:29" (1/3) ... [2021-11-07 02:19:42,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1207a088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:19:42, skipping insertion in model container [2021-11-07 02:19:42,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:30" (2/3) ... [2021-11-07 02:19:42,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1207a088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:19:42, skipping insertion in model container [2021-11-07 02:19:42,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:19:42" (3/3) ... [2021-11-07 02:19:42,587 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test10-3.i [2021-11-07 02:19:42,592 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:19:42,593 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1208 error locations. [2021-11-07 02:19:42,647 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:19:42,663 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:19:42,663 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1208 error locations. [2021-11-07 02:19:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 2500 states, 1291 states have (on average 2.2130131680867544) internal successors, (2857), 2499 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:42,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 02:19:42,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:42,729 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 02:19:42,730 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:19:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:42,735 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-07 02:19:42,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:42,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519441235] [2021-11-07 02:19:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:42,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:42,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:42,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:42,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:19:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:42,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:19:42,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:43,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:19:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:43,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:43,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:43,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519441235] [2021-11-07 02:19:43,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519441235] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:43,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:43,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:19:43,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664535810] [2021-11-07 02:19:43,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:19:43,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:43,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:19:43,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:19:43,136 INFO L87 Difference]: Start difference. First operand has 2500 states, 1291 states have (on average 2.2130131680867544) internal successors, (2857), 2499 states have internal predecessors, (2857), 0 states have call successors, (0), 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) [2021-11-07 02:19:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:48,680 INFO L93 Difference]: Finished difference Result 3353 states and 3561 transitions. [2021-11-07 02:19:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:19:48,681 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 [2021-11-07 02:19:48,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:48,721 INFO L225 Difference]: With dead ends: 3353 [2021-11-07 02:19:48,721 INFO L226 Difference]: Without dead ends: 3351 [2021-11-07 02:19:48,723 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 [2021-11-07 02:19:48,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2021-11-07 02:19:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 2648. [2021-11-07 02:19:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1463 states have (on average 2.0485304169514698) internal successors, (2997), 2647 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 2997 transitions. [2021-11-07 02:19:48,895 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 2997 transitions. Word has length 3 [2021-11-07 02:19:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:48,896 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 2997 transitions. [2021-11-07 02:19:48,897 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) [2021-11-07 02:19:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 2997 transitions. [2021-11-07 02:19:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 02:19:48,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:48,898 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 02:19:48,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:19:49,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:49,101 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:19:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-07 02:19:49,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:49,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734429701] [2021-11-07 02:19:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:49,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:49,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:49,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:49,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:19:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:49,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:19:49,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:49,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:19:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:49,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:49,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:49,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734429701] [2021-11-07 02:19:49,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734429701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:49,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:49,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:19:49,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430235775] [2021-11-07 02:19:49,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:49,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:49,456 INFO L87 Difference]: Start difference. First operand 2648 states and 2997 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) [2021-11-07 02:20:01,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:01,908 INFO L93 Difference]: Finished difference Result 4194 states and 4674 transitions. [2021-11-07 02:20:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:01,910 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 [2021-11-07 02:20:01,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:01,933 INFO L225 Difference]: With dead ends: 4194 [2021-11-07 02:20:01,934 INFO L226 Difference]: Without dead ends: 4194 [2021-11-07 02:20:01,934 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 [2021-11-07 02:20:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-11-07 02:20:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 2812. [2021-11-07 02:20:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 1639 states have (on average 2.0372178157413057) internal successors, (3339), 2811 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 3339 transitions. [2021-11-07 02:20:02,016 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 3339 transitions. Word has length 3 [2021-11-07 02:20:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:02,016 INFO L470 AbstractCegarLoop]: Abstraction has 2812 states and 3339 transitions. [2021-11-07 02:20:02,016 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) [2021-11-07 02:20:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 3339 transitions. [2021-11-07 02:20:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 02:20:02,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:02,018 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:02,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 02:20:02,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:02,228 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:20:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:02,229 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-07 02:20:02,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:02,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890286426] [2021-11-07 02:20:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:02,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:02,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:02,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:02,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:20:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:02,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:20:02,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:02,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:20:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:02,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:02,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:02,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890286426] [2021-11-07 02:20:02,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890286426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:02,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:02,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:20:02,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101589324] [2021-11-07 02:20:02,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:20:02,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:02,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:20:02,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:20:02,553 INFO L87 Difference]: Start difference. First operand 2812 states and 3339 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) [2021-11-07 02:20:06,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:06,444 INFO L93 Difference]: Finished difference Result 3618 states and 4157 transitions. [2021-11-07 02:20:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:20:06,448 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 [2021-11-07 02:20:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:06,467 INFO L225 Difference]: With dead ends: 3618 [2021-11-07 02:20:06,467 INFO L226 Difference]: Without dead ends: 3618 [2021-11-07 02:20:06,468 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 [2021-11-07 02:20:06,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-11-07 02:20:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 2721. [2021-11-07 02:20:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 1639 states have (on average 1.9609517998779744) internal successors, (3214), 2720 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 3214 transitions. [2021-11-07 02:20:06,544 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 3214 transitions. Word has length 8 [2021-11-07 02:20:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:06,544 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 3214 transitions. [2021-11-07 02:20:06,544 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) [2021-11-07 02:20:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 3214 transitions. [2021-11-07 02:20:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 02:20:06,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:06,546 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:06,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:06,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:06,761 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:20:06,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-07 02:20:06,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:06,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396197275] [2021-11-07 02:20:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:06,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:06,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:06,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:06,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:20:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:06,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:06,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:07,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:20:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:07,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:07,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:07,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396197275] [2021-11-07 02:20:07,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396197275] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:07,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:07,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:20:07,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572504481] [2021-11-07 02:20:07,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:07,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:07,164 INFO L87 Difference]: Start difference. First operand 2721 states and 3214 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) [2021-11-07 02:20:17,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:17,946 INFO L93 Difference]: Finished difference Result 3747 states and 4188 transitions. [2021-11-07 02:20:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:17,947 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 [2021-11-07 02:20:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:17,994 INFO L225 Difference]: With dead ends: 3747 [2021-11-07 02:20:17,994 INFO L226 Difference]: Without dead ends: 3747 [2021-11-07 02:20:17,995 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 [2021-11-07 02:20:18,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2021-11-07 02:20:18,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 2713. [2021-11-07 02:20:18,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 1641 states have (on average 1.9463741620962827) internal successors, (3194), 2712 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 3194 transitions. [2021-11-07 02:20:18,054 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 3194 transitions. Word has length 8 [2021-11-07 02:20:18,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:18,054 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 3194 transitions. [2021-11-07 02:20:18,055 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) [2021-11-07 02:20:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 3194 transitions. [2021-11-07 02:20:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 02:20:18,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:18,056 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:18,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:18,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:18,267 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:20:18,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:18,268 INFO L85 PathProgramCache]: Analyzing trace with hash 175289392, now seen corresponding path program 1 times [2021-11-07 02:20:18,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:18,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452600366] [2021-11-07 02:20:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:18,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:18,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:18,272 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:18,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:20:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:18,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:20:18,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:18,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:18,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:18,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452600366] [2021-11-07 02:20:18,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452600366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:18,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:18,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:20:18,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354321249] [2021-11-07 02:20:18,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:18,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:18,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:18,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:18,567 INFO L87 Difference]: Start difference. First operand 2713 states and 3194 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:18,617 INFO L93 Difference]: Finished difference Result 2671 states and 3151 transitions. [2021-11-07 02:20:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:20:18,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 02:20:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:18,632 INFO L225 Difference]: With dead ends: 2671 [2021-11-07 02:20:18,632 INFO L226 Difference]: Without dead ends: 2671 [2021-11-07 02:20:18,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-11-07 02:20:18,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2671. [2021-11-07 02:20:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 1623 states have (on average 1.9414664202094887) internal successors, (3151), 2670 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 3151 transitions. [2021-11-07 02:20:18,689 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 3151 transitions. Word has length 11 [2021-11-07 02:20:18,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:18,690 INFO L470 AbstractCegarLoop]: Abstraction has 2671 states and 3151 transitions. [2021-11-07 02:20:18,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:18,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 3151 transitions. [2021-11-07 02:20:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 02:20:18,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:18,694 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:18,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:18,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:18,909 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:20:18,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:18,909 INFO L85 PathProgramCache]: Analyzing trace with hash 949435626, now seen corresponding path program 1 times [2021-11-07 02:20:18,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:18,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44909684] [2021-11-07 02:20:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:18,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:18,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:18,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:18,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:20:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:19,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:19,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:19,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:19,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:19,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44909684] [2021-11-07 02:20:19,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44909684] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:19,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:19,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:20:19,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375913815] [2021-11-07 02:20:19,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:20:19,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:19,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:20:19,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:19,225 INFO L87 Difference]: Start difference. First operand 2671 states and 3151 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:19,328 INFO L93 Difference]: Finished difference Result 2650 states and 3123 transitions. [2021-11-07 02:20:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:19,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 02:20:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:19,341 INFO L225 Difference]: With dead ends: 2650 [2021-11-07 02:20:19,342 INFO L226 Difference]: Without dead ends: 2650 [2021-11-07 02:20:19,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:20:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-11-07 02:20:19,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2649. [2021-11-07 02:20:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 1615 states have (on average 1.9331269349845202) internal successors, (3122), 2648 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 3122 transitions. [2021-11-07 02:20:19,406 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 3122 transitions. Word has length 13 [2021-11-07 02:20:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:19,407 INFO L470 AbstractCegarLoop]: Abstraction has 2649 states and 3122 transitions. [2021-11-07 02:20:19,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:19,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 3122 transitions. [2021-11-07 02:20:19,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 02:20:19,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:19,409 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:19,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:19,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:19,621 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:20:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:19,622 INFO L85 PathProgramCache]: Analyzing trace with hash 270217471, now seen corresponding path program 1 times [2021-11-07 02:20:19,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:19,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671775761] [2021-11-07 02:20:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:19,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:19,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:19,624 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:19,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:20:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:19,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:20:19,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:19,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:19,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:19,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671775761] [2021-11-07 02:20:19,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671775761] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:19,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:19,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:20:19,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252907560] [2021-11-07 02:20:19,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:19,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:19,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:19,988 INFO L87 Difference]: Start difference. First operand 2649 states and 3122 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:20,050 INFO L93 Difference]: Finished difference Result 4337 states and 4926 transitions. [2021-11-07 02:20:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:20:20,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 02:20:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:20,081 INFO L225 Difference]: With dead ends: 4337 [2021-11-07 02:20:20,081 INFO L226 Difference]: Without dead ends: 4337 [2021-11-07 02:20:20,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4337 states. [2021-11-07 02:20:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4337 to 2571. [2021-11-07 02:20:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 1561 states have (on average 1.9173606662395901) internal successors, (2993), 2570 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 2993 transitions. [2021-11-07 02:20:20,153 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 2993 transitions. Word has length 20 [2021-11-07 02:20:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:20,154 INFO L470 AbstractCegarLoop]: Abstraction has 2571 states and 2993 transitions. [2021-11-07 02:20:20,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 2993 transitions. [2021-11-07 02:20:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 02:20:20,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:20,157 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:20,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:20,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:20,374 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:20:20,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:20,374 INFO L85 PathProgramCache]: Analyzing trace with hash -673839521, now seen corresponding path program 1 times [2021-11-07 02:20:20,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:20,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84539593] [2021-11-07 02:20:20,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:20,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:20,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:20,377 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:20,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:20:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:20,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:20:20,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:20,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:20,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:20,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84539593] [2021-11-07 02:20:20,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84539593] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:20,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:20,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:20:20,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878188836] [2021-11-07 02:20:20,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:20,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:20,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:20,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:20,728 INFO L87 Difference]: Start difference. First operand 2571 states and 2993 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:20,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:20,803 INFO L93 Difference]: Finished difference Result 4260 states and 4849 transitions. [2021-11-07 02:20:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:20:20,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 02:20:20,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:20,818 INFO L225 Difference]: With dead ends: 4260 [2021-11-07 02:20:20,818 INFO L226 Difference]: Without dead ends: 4260 [2021-11-07 02:20:20,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2021-11-07 02:20:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 2529. [2021-11-07 02:20:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 1543 states have (on average 1.911860012961763) internal successors, (2950), 2528 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 2950 transitions. [2021-11-07 02:20:20,876 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 2950 transitions. Word has length 20 [2021-11-07 02:20:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:20,876 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 2950 transitions. [2021-11-07 02:20:20,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 2950 transitions. [2021-11-07 02:20:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:20:20,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:20,878 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] [2021-11-07 02:20:20,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:21,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:21,097 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:20:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1980977049, now seen corresponding path program 1 times [2021-11-07 02:20:21,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:21,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74214489] [2021-11-07 02:20:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:21,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:21,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:21,100 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:21,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:20:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:21,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:21,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:21,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:21,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:21,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74214489] [2021-11-07 02:20:21,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74214489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:21,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:21,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:20:21,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460073419] [2021-11-07 02:20:21,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:20:21,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:21,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:20:21,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:21,498 INFO L87 Difference]: Start difference. First operand 2529 states and 2950 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:21,667 INFO L93 Difference]: Finished difference Result 4218 states and 4756 transitions. [2021-11-07 02:20:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:21,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 02:20:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:21,688 INFO L225 Difference]: With dead ends: 4218 [2021-11-07 02:20:21,688 INFO L226 Difference]: Without dead ends: 4218 [2021-11-07 02:20:21,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:20:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2021-11-07 02:20:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 2491. [2021-11-07 02:20:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 1519 states have (on average 1.8847926267281105) internal successors, (2863), 2490 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 2863 transitions. [2021-11-07 02:20:21,745 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 2863 transitions. Word has length 22 [2021-11-07 02:20:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:21,745 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 2863 transitions. [2021-11-07 02:20:21,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:21,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 2863 transitions. [2021-11-07 02:20:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:20:21,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:21,764 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:21,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:21,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:21,964 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:20:21,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:21,965 INFO L85 PathProgramCache]: Analyzing trace with hash 980278297, now seen corresponding path program 1 times [2021-11-07 02:20:21,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:21,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475708068] [2021-11-07 02:20:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:21,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:21,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:21,967 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:21,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:20:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:22,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:22,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:22,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:22,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:22,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475708068] [2021-11-07 02:20:22,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475708068] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:22,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:22,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:20:22,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641730020] [2021-11-07 02:20:22,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:20:22,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:22,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:20:22,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:22,428 INFO L87 Difference]: Start difference. First operand 2491 states and 2863 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:22,547 INFO L93 Difference]: Finished difference Result 4179 states and 4705 transitions. [2021-11-07 02:20:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:22,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 02:20:22,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:22,556 INFO L225 Difference]: With dead ends: 4179 [2021-11-07 02:20:22,557 INFO L226 Difference]: Without dead ends: 4179 [2021-11-07 02:20:22,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:20:22,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4179 states. [2021-11-07 02:20:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4179 to 2469. [2021-11-07 02:20:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 1511 states have (on average 1.8755790866975512) internal successors, (2834), 2468 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 2834 transitions. [2021-11-07 02:20:22,608 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 2834 transitions. Word has length 22 [2021-11-07 02:20:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:22,608 INFO L470 AbstractCegarLoop]: Abstraction has 2469 states and 2834 transitions. [2021-11-07 02:20:22,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 2834 transitions. [2021-11-07 02:20:22,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:20:22,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:22,610 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:22,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:22,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:22,822 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:20:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:22,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283832, now seen corresponding path program 1 times [2021-11-07 02:20:22,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:22,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100884605] [2021-11-07 02:20:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:22,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:22,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:22,824 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:22,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:20:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:23,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:23,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:23,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:20:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:23,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:23,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:23,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100884605] [2021-11-07 02:20:23,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100884605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:23,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:23,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:20:23,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30698575] [2021-11-07 02:20:23,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:23,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:23,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:23,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:23,319 INFO L87 Difference]: Start difference. First operand 2469 states and 2834 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:27,572 INFO L93 Difference]: Finished difference Result 3093 states and 3377 transitions. [2021-11-07 02:20:27,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:27,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 02:20:27,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:27,579 INFO L225 Difference]: With dead ends: 3093 [2021-11-07 02:20:27,580 INFO L226 Difference]: Without dead ends: 3093 [2021-11-07 02:20:27,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-11-07 02:20:27,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 2465. [2021-11-07 02:20:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2465 states, 1511 states have (on average 1.8729318332230311) internal successors, (2830), 2464 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 2830 transitions. [2021-11-07 02:20:27,646 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 2830 transitions. Word has length 27 [2021-11-07 02:20:27,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:27,646 INFO L470 AbstractCegarLoop]: Abstraction has 2465 states and 2830 transitions. [2021-11-07 02:20:27,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 2830 transitions. [2021-11-07 02:20:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:20:27,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:27,648 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:27,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:27,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:27,863 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:20:27,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:27,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283833, now seen corresponding path program 1 times [2021-11-07 02:20:27,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:27,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438016255] [2021-11-07 02:20:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:27,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:27,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:27,865 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:27,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:20:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:28,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:20:28,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:28,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:20:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:28,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:28,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:28,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438016255] [2021-11-07 02:20:28,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438016255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:28,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:28,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:20:28,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128028683] [2021-11-07 02:20:28,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:20:28,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:28,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:20:28,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:20:28,930 INFO L87 Difference]: Start difference. First operand 2465 states and 2830 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:43,000 INFO L93 Difference]: Finished difference Result 3708 states and 4079 transitions. [2021-11-07 02:20:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:20:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 02:20:43,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:43,009 INFO L225 Difference]: With dead ends: 3708 [2021-11-07 02:20:43,009 INFO L226 Difference]: Without dead ends: 3708 [2021-11-07 02:20:43,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:20:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2021-11-07 02:20:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 2498. [2021-11-07 02:20:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 1545 states have (on average 1.855663430420712) internal successors, (2867), 2497 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 2867 transitions. [2021-11-07 02:20:43,053 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 2867 transitions. Word has length 27 [2021-11-07 02:20:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:43,054 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 2867 transitions. [2021-11-07 02:20:43,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 2867 transitions. [2021-11-07 02:20:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:20:43,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:43,056 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] [2021-11-07 02:20:43,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:43,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:43,271 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:20:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:43,272 INFO L85 PathProgramCache]: Analyzing trace with hash 187122631, now seen corresponding path program 1 times [2021-11-07 02:20:43,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:43,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970617519] [2021-11-07 02:20:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:43,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:43,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:43,276 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:43,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:20:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:43,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:43,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:43,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:20:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:43,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:43,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:43,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970617519] [2021-11-07 02:20:43,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970617519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:43,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:43,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:20:43,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367182029] [2021-11-07 02:20:43,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:43,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:43,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:43,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:43,912 INFO L87 Difference]: Start difference. First operand 2498 states and 2867 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:51,248 INFO L93 Difference]: Finished difference Result 5277 states and 5889 transitions. [2021-11-07 02:20:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:20:51,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-07 02:20:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:51,255 INFO L225 Difference]: With dead ends: 5277 [2021-11-07 02:20:51,255 INFO L226 Difference]: Without dead ends: 5277 [2021-11-07 02:20:51,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2021-11-07 02:20:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 2495. [2021-11-07 02:20:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 1545 states have (on average 1.8485436893203884) internal successors, (2856), 2494 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2856 transitions. [2021-11-07 02:20:51,303 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2856 transitions. Word has length 36 [2021-11-07 02:20:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:51,304 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 2856 transitions. [2021-11-07 02:20:51,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:51,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2856 transitions. [2021-11-07 02:20:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:20:51,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:51,305 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] [2021-11-07 02:20:51,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:51,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:51,519 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:20:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash 187122632, now seen corresponding path program 1 times [2021-11-07 02:20:51,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:51,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427041008] [2021-11-07 02:20:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:51,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:51,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:51,521 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:51,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:20:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:51,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:20:51,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:51,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:20:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:52,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:52,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:52,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427041008] [2021-11-07 02:20:52,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427041008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:52,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:52,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:20:52,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452325494] [2021-11-07 02:20:52,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:20:52,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:52,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:20:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:20:52,708 INFO L87 Difference]: Start difference. First operand 2495 states and 2856 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:15,009 INFO L93 Difference]: Finished difference Result 5397 states and 5957 transitions. [2021-11-07 02:21:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:21:15,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 02:21:15,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:15,017 INFO L225 Difference]: With dead ends: 5397 [2021-11-07 02:21:15,017 INFO L226 Difference]: Without dead ends: 5397 [2021-11-07 02:21:15,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:21:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-11-07 02:21:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 2495. [2021-11-07 02:21:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 1545 states have (on average 1.8459546925566344) internal successors, (2852), 2494 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2852 transitions. [2021-11-07 02:21:15,060 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2852 transitions. Word has length 36 [2021-11-07 02:21:15,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:15,061 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 2852 transitions. [2021-11-07 02:21:15,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2852 transitions. [2021-11-07 02:21:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:21:15,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:15,062 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] [2021-11-07 02:21:15,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:15,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:15,274 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:21:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2021-11-07 02:21:15,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:15,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623025720] [2021-11-07 02:21:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:15,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:15,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:15,276 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:15,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:21:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:15,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:15,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:15,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:21:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:15,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:15,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:15,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623025720] [2021-11-07 02:21:15,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623025720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:15,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:15,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:15,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493006632] [2021-11-07 02:21:15,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:15,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:15,919 INFO L87 Difference]: Start difference. First operand 2495 states and 2852 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:22,022 INFO L93 Difference]: Finished difference Result 4881 states and 5469 transitions. [2021-11-07 02:21:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:22,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-07 02:21:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:22,025 INFO L225 Difference]: With dead ends: 4881 [2021-11-07 02:21:22,026 INFO L226 Difference]: Without dead ends: 4881 [2021-11-07 02:21:22,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4881 states. [2021-11-07 02:21:22,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4881 to 2491. [2021-11-07 02:21:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 1545 states have (on average 1.8433656957928803) internal successors, (2848), 2490 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 2848 transitions. [2021-11-07 02:21:22,067 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 2848 transitions. Word has length 36 [2021-11-07 02:21:22,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:22,068 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 2848 transitions. [2021-11-07 02:21:22,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 2848 transitions. [2021-11-07 02:21:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:21:22,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:22,069 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] [2021-11-07 02:21:22,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:22,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:22,281 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:21:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:22,281 INFO L85 PathProgramCache]: Analyzing trace with hash -773066200, now seen corresponding path program 1 times [2021-11-07 02:21:22,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:22,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531100209] [2021-11-07 02:21:22,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:22,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:22,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:22,283 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:22,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:21:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:22,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:21:22,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:22,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:21:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:23,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:23,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:23,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531100209] [2021-11-07 02:21:23,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531100209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:23,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:23,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:21:23,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878712658] [2021-11-07 02:21:23,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:21:23,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:23,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:21:23,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:23,566 INFO L87 Difference]: Start difference. First operand 2491 states and 2848 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:38,287 INFO L93 Difference]: Finished difference Result 4786 states and 5254 transitions. [2021-11-07 02:21:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:21:38,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 02:21:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:38,291 INFO L225 Difference]: With dead ends: 4786 [2021-11-07 02:21:38,292 INFO L226 Difference]: Without dead ends: 4786 [2021-11-07 02:21:38,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:21:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-11-07 02:21:38,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 2487. [2021-11-07 02:21:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 1545 states have (on average 1.840776699029126) internal successors, (2844), 2486 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 2844 transitions. [2021-11-07 02:21:38,350 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 2844 transitions. Word has length 36 [2021-11-07 02:21:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:38,350 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 2844 transitions. [2021-11-07 02:21:38,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:38,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 2844 transitions. [2021-11-07 02:21:38,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:21:38,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:38,352 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] [2021-11-07 02:21:38,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:38,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:38,565 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:21:38,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:38,566 INFO L85 PathProgramCache]: Analyzing trace with hash -480226171, now seen corresponding path program 1 times [2021-11-07 02:21:38,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:38,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834263617] [2021-11-07 02:21:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:38,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:38,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:38,568 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:38,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:21:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:39,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:39,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:39,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834263617] [2021-11-07 02:21:39,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834263617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:39,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:39,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:21:39,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904338490] [2021-11-07 02:21:39,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:39,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:39,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:39,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:39,207 INFO L87 Difference]: Start difference. First operand 2487 states and 2844 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:39,274 INFO L93 Difference]: Finished difference Result 2481 states and 2830 transitions. [2021-11-07 02:21:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:21:39,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 02:21:39,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:39,277 INFO L225 Difference]: With dead ends: 2481 [2021-11-07 02:21:39,277 INFO L226 Difference]: Without dead ends: 2481 [2021-11-07 02:21:39,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-07 02:21:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2021-11-07 02:21:39,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 1539 states have (on average 1.838856400259909) internal successors, (2830), 2480 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 2830 transitions. [2021-11-07 02:21:39,308 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 2830 transitions. Word has length 40 [2021-11-07 02:21:39,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:39,308 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 2830 transitions. [2021-11-07 02:21:39,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:39,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 2830 transitions. [2021-11-07 02:21:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:21:39,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:39,310 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] [2021-11-07 02:21:39,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:39,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:39,523 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:21:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:39,523 INFO L85 PathProgramCache]: Analyzing trace with hash -952585927, now seen corresponding path program 1 times [2021-11-07 02:21:39,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:39,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766515646] [2021-11-07 02:21:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:39,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:39,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:39,525 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:39,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:21:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:40,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:40,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:40,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:40,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:40,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766515646] [2021-11-07 02:21:40,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766515646] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:40,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:40,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:40,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100513229] [2021-11-07 02:21:40,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:40,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:40,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:40,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:40,755 INFO L87 Difference]: Start difference. First operand 2481 states and 2830 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:41,051 INFO L93 Difference]: Finished difference Result 4076 states and 4571 transitions. [2021-11-07 02:21:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:41,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-07 02:21:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:41,055 INFO L225 Difference]: With dead ends: 4076 [2021-11-07 02:21:41,055 INFO L226 Difference]: Without dead ends: 4076 [2021-11-07 02:21:41,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-11-07 02:21:41,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3245. [2021-11-07 02:21:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 2303 states have (on average 1.8085106382978724) internal successors, (4165), 3244 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 4165 transitions. [2021-11-07 02:21:41,100 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 4165 transitions. Word has length 48 [2021-11-07 02:21:41,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:41,100 INFO L470 AbstractCegarLoop]: Abstraction has 3245 states and 4165 transitions. [2021-11-07 02:21:41,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 4165 transitions. [2021-11-07 02:21:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:21:41,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:41,102 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] [2021-11-07 02:21:41,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-07 02:21:41,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:41,314 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:21:41,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:41,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606781, now seen corresponding path program 1 times [2021-11-07 02:21:41,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:41,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198663397] [2021-11-07 02:21:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:41,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:41,316 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:41,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:21:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:41,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:41,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:41,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:42,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:42,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198663397] [2021-11-07 02:21:42,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198663397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:42,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:42,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:21:42,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664542128] [2021-11-07 02:21:42,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:42,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:42,066 INFO L87 Difference]: Start difference. First operand 3245 states and 4165 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:42,154 INFO L93 Difference]: Finished difference Result 4650 states and 5656 transitions. [2021-11-07 02:21:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:21:42,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 02:21:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:42,160 INFO L225 Difference]: With dead ends: 4650 [2021-11-07 02:21:42,160 INFO L226 Difference]: Without dead ends: 4650 [2021-11-07 02:21:42,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2021-11-07 02:21:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 3221. [2021-11-07 02:21:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3221 states, 2279 states have (on average 1.8100043878894252) internal successors, (4125), 3220 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3221 states to 3221 states and 4125 transitions. [2021-11-07 02:21:42,207 INFO L78 Accepts]: Start accepts. Automaton has 3221 states and 4125 transitions. Word has length 51 [2021-11-07 02:21:42,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:42,207 INFO L470 AbstractCegarLoop]: Abstraction has 3221 states and 4125 transitions. [2021-11-07 02:21:42,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3221 states and 4125 transitions. [2021-11-07 02:21:42,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:21:42,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:42,209 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] [2021-11-07 02:21:42,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:42,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:42,421 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:21:42,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:42,422 INFO L85 PathProgramCache]: Analyzing trace with hash 732181606, now seen corresponding path program 1 times [2021-11-07 02:21:42,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:42,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609257696] [2021-11-07 02:21:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:42,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:42,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:42,424 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:42,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:21:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:42,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:42,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:43,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:43,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:43,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609257696] [2021-11-07 02:21:43,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609257696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:43,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:43,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:21:43,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807500296] [2021-11-07 02:21:43,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:43,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:43,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:43,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:43,246 INFO L87 Difference]: Start difference. First operand 3221 states and 4125 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:43,332 INFO L93 Difference]: Finished difference Result 4386 states and 5145 transitions. [2021-11-07 02:21:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:21:43,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:21:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:43,337 INFO L225 Difference]: With dead ends: 4386 [2021-11-07 02:21:43,338 INFO L226 Difference]: Without dead ends: 4386 [2021-11-07 02:21:43,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:43,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-11-07 02:21:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3209. [2021-11-07 02:21:43,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 2267 states have (on average 1.8107631230701366) internal successors, (4105), 3208 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 4105 transitions. [2021-11-07 02:21:43,388 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 4105 transitions. Word has length 54 [2021-11-07 02:21:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:43,388 INFO L470 AbstractCegarLoop]: Abstraction has 3209 states and 4105 transitions. [2021-11-07 02:21:43,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 4105 transitions. [2021-11-07 02:21:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:21:43,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:43,389 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] [2021-11-07 02:21:43,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:43,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:43,604 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr740ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:21:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:43,605 INFO L85 PathProgramCache]: Analyzing trace with hash -993308447, now seen corresponding path program 1 times [2021-11-07 02:21:43,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:43,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335299119] [2021-11-07 02:21:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:43,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:43,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:43,607 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:43,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:21:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:44,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:44,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:44,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:21:44,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:21:44,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:21:44,318 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 02:21:44,318 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 [2021-11-07 02:21:44,371 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 02:21:44,371 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 [2021-11-07 02:21:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:44,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:44,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:44,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335299119] [2021-11-07 02:21:44,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335299119] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:44,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:44,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:21:44,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091270550] [2021-11-07 02:21:44,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:21:44,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:44,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:21:44,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:44,641 INFO L87 Difference]: Start difference. First operand 3209 states and 4105 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:47,629 INFO L93 Difference]: Finished difference Result 3437 states and 4344 transitions. [2021-11-07 02:21:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:21:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:47,634 INFO L225 Difference]: With dead ends: 3437 [2021-11-07 02:21:47,634 INFO L226 Difference]: Without dead ends: 3437 [2021-11-07 02:21:47,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:21:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2021-11-07 02:21:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3175. [2021-11-07 02:21:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 2233 states have (on average 1.8226600985221675) internal successors, (4070), 3174 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:47,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 4070 transitions. [2021-11-07 02:21:47,690 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 4070 transitions. Word has length 54 [2021-11-07 02:21:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:47,690 INFO L470 AbstractCegarLoop]: Abstraction has 3175 states and 4070 transitions. [2021-11-07 02:21:47,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 4070 transitions. [2021-11-07 02:21:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:21:47,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:47,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:47,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:47,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:47,905 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:21:47,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:47,906 INFO L85 PathProgramCache]: Analyzing trace with hash -637866953, now seen corresponding path program 1 times [2021-11-07 02:21:47,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:47,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594031414] [2021-11-07 02:21:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:47,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:47,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:47,907 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:47,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:21:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:48,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:49,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:49,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:49,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594031414] [2021-11-07 02:21:49,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594031414] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:49,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:49,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:49,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962104577] [2021-11-07 02:21:49,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:49,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:49,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:49,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:49,458 INFO L87 Difference]: Start difference. First operand 3175 states and 4070 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:49,666 INFO L93 Difference]: Finished difference Result 4704 states and 5822 transitions. [2021-11-07 02:21:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:49,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 02:21:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:49,672 INFO L225 Difference]: With dead ends: 4704 [2021-11-07 02:21:49,672 INFO L226 Difference]: Without dead ends: 4704 [2021-11-07 02:21:49,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2021-11-07 02:21:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3943. [2021-11-07 02:21:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3001 states have (on average 1.7887370876374542) internal successors, (5368), 3942 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 5368 transitions. [2021-11-07 02:21:49,733 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 5368 transitions. Word has length 59 [2021-11-07 02:21:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:49,734 INFO L470 AbstractCegarLoop]: Abstraction has 3943 states and 5368 transitions. [2021-11-07 02:21:49,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 5368 transitions. [2021-11-07 02:21:49,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:21:49,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:49,735 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] [2021-11-07 02:21:49,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:49,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:49,950 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:21:49,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:49,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812110, now seen corresponding path program 1 times [2021-11-07 02:21:49,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:49,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566516318] [2021-11-07 02:21:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:49,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:49,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:49,952 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:49,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:21:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:50,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:21:50,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:50,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:21:50,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:21:51,513 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:21:51,513 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 26 treesize of output 28 [2021-11-07 02:21:51,520 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 02:21:51,520 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 25 treesize of output 21 [2021-11-07 02:21:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:51,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:56,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:56,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566516318] [2021-11-07 02:21:56,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566516318] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:56,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:56,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:21:56,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550254978] [2021-11-07 02:21:56,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:21:56,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:56,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:21:56,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-07 02:21:56,798 INFO L87 Difference]: Start difference. First operand 3943 states and 5368 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:28,145 INFO L93 Difference]: Finished difference Result 7168 states and 9781 transitions. [2021-11-07 02:22:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:22:28,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 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 62 [2021-11-07 02:22:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:28,151 INFO L225 Difference]: With dead ends: 7168 [2021-11-07 02:22:28,152 INFO L226 Difference]: Without dead ends: 7168 [2021-11-07 02:22:28,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-07 02:22:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7168 states. [2021-11-07 02:22:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7168 to 3887. [2021-11-07 02:22:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3887 states, 3009 states have (on average 1.7374543037554004) internal successors, (5228), 3886 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3887 states to 3887 states and 5228 transitions. [2021-11-07 02:22:28,250 INFO L78 Accepts]: Start accepts. Automaton has 3887 states and 5228 transitions. Word has length 62 [2021-11-07 02:22:28,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:28,250 INFO L470 AbstractCegarLoop]: Abstraction has 3887 states and 5228 transitions. [2021-11-07 02:22:28,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3887 states and 5228 transitions. [2021-11-07 02:22:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:22:28,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:28,254 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] [2021-11-07 02:22:28,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:28,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:28,468 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr396ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:22:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1203198829, now seen corresponding path program 1 times [2021-11-07 02:22:28,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:28,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125678371] [2021-11-07 02:22:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:28,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:28,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:28,471 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:28,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:22:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:29,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:29,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:29,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:22:29,327 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 [2021-11-07 02:22:29,361 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 25 treesize of output 13 [2021-11-07 02:22:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:29,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:29,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:29,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125678371] [2021-11-07 02:22:29,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125678371] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:29,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:29,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:22:29,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794451582] [2021-11-07 02:22:29,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:22:29,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:29,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:22:29,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:29,521 INFO L87 Difference]: Start difference. First operand 3887 states and 5228 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:40,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:40,058 INFO L93 Difference]: Finished difference Result 6424 states and 8590 transitions. [2021-11-07 02:22:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:22:40,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:22:40,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:40,063 INFO L225 Difference]: With dead ends: 6424 [2021-11-07 02:22:40,063 INFO L226 Difference]: Without dead ends: 6424 [2021-11-07 02:22:40,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:22:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6424 states. [2021-11-07 02:22:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6424 to 3886. [2021-11-07 02:22:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3009 states have (on average 1.7364572947823198) internal successors, (5225), 3885 states have internal predecessors, (5225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5225 transitions. [2021-11-07 02:22:40,138 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5225 transitions. Word has length 68 [2021-11-07 02:22:40,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:40,138 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 5225 transitions. [2021-11-07 02:22:40,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5225 transitions. [2021-11-07 02:22:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:22:40,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:40,139 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] [2021-11-07 02:22:40,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:40,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:40,353 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:22:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1028979469, now seen corresponding path program 1 times [2021-11-07 02:22:40,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:40,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059437992] [2021-11-07 02:22:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:40,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:40,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:40,355 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:40,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:22:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:41,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:41,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:41,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:22:41,214 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 22 treesize of output 18 [2021-11-07 02:22:41,249 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 [2021-11-07 02:22:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:41,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:41,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:41,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059437992] [2021-11-07 02:22:41,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059437992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:41,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:41,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:22:41,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979526058] [2021-11-07 02:22:41,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:22:41,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:41,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:22:41,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:41,435 INFO L87 Difference]: Start difference. First operand 3886 states and 5225 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:52,574 INFO L93 Difference]: Finished difference Result 6416 states and 8576 transitions. [2021-11-07 02:22:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:22:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:22:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:52,580 INFO L225 Difference]: With dead ends: 6416 [2021-11-07 02:22:52,580 INFO L226 Difference]: Without dead ends: 6416 [2021-11-07 02:22:52,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:22:52,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6416 states. [2021-11-07 02:22:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6416 to 3885. [2021-11-07 02:22:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3009 states have (on average 1.7357926221335993) internal successors, (5223), 3884 states have internal predecessors, (5223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 5223 transitions. [2021-11-07 02:22:52,629 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 5223 transitions. Word has length 68 [2021-11-07 02:22:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:52,629 INFO L470 AbstractCegarLoop]: Abstraction has 3885 states and 5223 transitions. [2021-11-07 02:22:52,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 5223 transitions. [2021-11-07 02:22:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:22:52,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:52,631 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] [2021-11-07 02:22:52,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-07 02:22:52,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:52,866 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr397ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:22:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:52,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1355543210, now seen corresponding path program 1 times [2021-11-07 02:22:52,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:52,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619463047] [2021-11-07 02:22:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:52,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:52,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:52,868 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:52,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:22:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:53,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:22:53,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:53,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:22:53,776 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 [2021-11-07 02:22:53,784 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 [2021-11-07 02:22:53,840 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 [2021-11-07 02:22:53,843 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 [2021-11-07 02:22:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:53,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:54,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:54,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619463047] [2021-11-07 02:22:54,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619463047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:54,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:54,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:22:54,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362798546] [2021-11-07 02:22:54,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:22:54,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:54,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:22:54,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:22:54,418 INFO L87 Difference]: Start difference. First operand 3885 states and 5223 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:31,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:31,633 INFO L93 Difference]: Finished difference Result 5915 states and 7866 transitions. [2021-11-07 02:23:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:23:31,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 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 69 [2021-11-07 02:23:31,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:31,640 INFO L225 Difference]: With dead ends: 5915 [2021-11-07 02:23:31,640 INFO L226 Difference]: Without dead ends: 5915 [2021-11-07 02:23:31,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:23:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-11-07 02:23:31,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 3884. [2021-11-07 02:23:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 3009 states have (on average 1.7347956131605184) internal successors, (5220), 3883 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 5220 transitions. [2021-11-07 02:23:31,710 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 5220 transitions. Word has length 69 [2021-11-07 02:23:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:31,710 INFO L470 AbstractCegarLoop]: Abstraction has 3884 states and 5220 transitions. [2021-11-07 02:23:31,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 5220 transitions. [2021-11-07 02:23:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:23:31,711 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:31,712 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] [2021-11-07 02:23:31,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:31,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:31,927 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:23:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:31,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1833592125, now seen corresponding path program 1 times [2021-11-07 02:23:31,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:31,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820551911] [2021-11-07 02:23:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:31,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:31,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:31,929 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:31,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:23:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:32,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:23:32,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:32,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:23:32,907 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 [2021-11-07 02:23:32,918 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 [2021-11-07 02:23:32,999 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 [2021-11-07 02:23:33,003 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 [2021-11-07 02:23:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:33,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:33,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:33,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820551911] [2021-11-07 02:23:33,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820551911] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:33,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:33,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:23:33,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78911246] [2021-11-07 02:23:33,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:23:33,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:23:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:23:33,555 INFO L87 Difference]: Start difference. First operand 3884 states and 5220 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:13,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:13,063 INFO L93 Difference]: Finished difference Result 5910 states and 7857 transitions. [2021-11-07 02:24:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:24:13,065 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 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 69 [2021-11-07 02:24:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:13,069 INFO L225 Difference]: With dead ends: 5910 [2021-11-07 02:24:13,069 INFO L226 Difference]: Without dead ends: 5910 [2021-11-07 02:24:13,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:24:13,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5910 states. [2021-11-07 02:24:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5910 to 3883. [2021-11-07 02:24:13,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3883 states, 3009 states have (on average 1.734130940511798) internal successors, (5218), 3882 states have internal predecessors, (5218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3883 states to 3883 states and 5218 transitions. [2021-11-07 02:24:13,112 INFO L78 Accepts]: Start accepts. Automaton has 3883 states and 5218 transitions. Word has length 69 [2021-11-07 02:24:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:13,113 INFO L470 AbstractCegarLoop]: Abstraction has 3883 states and 5218 transitions. [2021-11-07 02:24:13,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3883 states and 5218 transitions. [2021-11-07 02:24:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:24:13,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:13,114 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, 1, 1] [2021-11-07 02:24:13,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:13,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:13,314 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:24:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1361720913, now seen corresponding path program 1 times [2021-11-07 02:24:13,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:13,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076967140] [2021-11-07 02:24:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:13,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:13,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:13,316 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:13,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 02:24:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:14,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:24:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:14,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:14,512 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:14,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076967140] [2021-11-07 02:24:14,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076967140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:14,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:14,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:24:14,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387576018] [2021-11-07 02:24:14,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:24:14,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:14,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:24:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:24:14,513 INFO L87 Difference]: Start difference. First operand 3883 states and 5218 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:14,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:14,728 INFO L93 Difference]: Finished difference Result 7174 states and 9586 transitions. [2021-11-07 02:24:14,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:24:14,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 [2021-11-07 02:24:14,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:14,734 INFO L225 Difference]: With dead ends: 7174 [2021-11-07 02:24:14,734 INFO L226 Difference]: Without dead ends: 7174 [2021-11-07 02:24:14,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:24:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7174 states. [2021-11-07 02:24:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7174 to 3898. [2021-11-07 02:24:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3898 states, 3024 states have (on average 1.730489417989418) internal successors, (5233), 3897 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3898 states to 3898 states and 5233 transitions. [2021-11-07 02:24:14,824 INFO L78 Accepts]: Start accepts. Automaton has 3898 states and 5233 transitions. Word has length 73 [2021-11-07 02:24:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:14,825 INFO L470 AbstractCegarLoop]: Abstraction has 3898 states and 5233 transitions. [2021-11-07 02:24:14,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3898 states and 5233 transitions. [2021-11-07 02:24:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:24:14,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:14,826 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:14,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:15,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:15,044 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:24:15,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:15,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1412235279, now seen corresponding path program 1 times [2021-11-07 02:24:15,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:15,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789631735] [2021-11-07 02:24:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:15,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:15,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:15,046 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:15,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 02:24:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:15,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:24:15,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:16,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:16,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:16,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789631735] [2021-11-07 02:24:16,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789631735] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:16,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1766325840] [2021-11-07 02:24:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:16,370 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:16,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:16,371 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:16,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 02:24:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:17,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:24:17,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:17,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:17,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1766325840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:17,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974703857] [2021-11-07 02:24:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:17,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:24:17,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:24:17,953 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:24:17,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 02:24:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:24:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:19,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:19,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974703857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:19,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:24:19,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-07 02:24:19,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030364828] [2021-11-07 02:24:19,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:24:19,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:19,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:24:19,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:24:19,569 INFO L87 Difference]: Start difference. First operand 3898 states and 5233 transitions. Second operand has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:21,117 INFO L93 Difference]: Finished difference Result 10493 states and 13982 transitions. [2021-11-07 02:24:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:24:21,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:24:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:21,127 INFO L225 Difference]: With dead ends: 10493 [2021-11-07 02:24:21,127 INFO L226 Difference]: Without dead ends: 10493 [2021-11-07 02:24:21,127 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:24:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10493 states. [2021-11-07 02:24:21,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10493 to 3940. [2021-11-07 02:24:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3940 states, 3066 states have (on average 1.7230919765166341) internal successors, (5283), 3939 states have internal predecessors, (5283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 5283 transitions. [2021-11-07 02:24:21,192 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 5283 transitions. Word has length 75 [2021-11-07 02:24:21,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:21,193 INFO L470 AbstractCegarLoop]: Abstraction has 3940 states and 5283 transitions. [2021-11-07 02:24:21,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:21,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 5283 transitions. [2021-11-07 02:24:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:24:21,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:21,194 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, 1, 1] [2021-11-07 02:24:21,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:21,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:21,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-07 02:24:21,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:21,809 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-07 02:24:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash -547693775, now seen corresponding path program 2 times [2021-11-07 02:24:21,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:21,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385053579] [2021-11-07 02:24:21,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:24:21,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:21,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:21,812 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:21,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fef1bb0-bc6b-42fb-8e85-a5c09e66b8f0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 02:24:22,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 02:24:22,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:24:22,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:24:22,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:23,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:24:23,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:24:23,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:24:23,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:24:23,099 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 02:24:23,099 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 [2021-11-07 02:24:23,201 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:24:23,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-07 02:24:23,478 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-07 02:24:23,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-07 02:24:29,123 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-07 02:24:29,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-07 02:24:38,798 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-07 02:24:38,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-07 02:24:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:24:38,970 INFO L328 TraceCheckSpWp]: Computing backward predicates...